m. · 2016-04-18 · the remaining four stations, viz., 220 kv kaiga aps (4-6 april, 2016), 400/...

Minutes of the 52

nd PCSC Meeting held on 30-03-2016 Page 1

SOUTHERN REGIONAL POWER COMMITTEE BENGALURU

Minutes of the 52nd Meeting of Protection Coordination Sub-Committee

(PCSC – 52) of SRPC held on 30.03.2016

1. Introduction The 52nd meeting of Protection Coordination Sub-Committee (PCSC-52) was held on 30th March, 2016 in the Conference Hall of Southern Regional Power Committee (SRPC), Bangalore. The list of participants is enclosed at Annexure-I.

Sh. S.R. Bhat, Member Secretary (MS), SRPC welcomed the Members and Participants to the meeting and briefed them on the following:

Informed members that Protection Audit Review of Stations (15 in number) under Task-2 by the Consultant was under progress. Audit of 11 Stations had already been completed. The remaining four Stations, viz., 220 kV Kaiga APS (4-6 April, 2016), 400/ 220 kV Guttur SS, 400/220 kV Raichur TPS, and 220 kV Nagjheri Station, would also be audited shortly. He requested Constituents’ active cooperation in completing Task-2 activities to the satisfaction of all parties involved.

Reminded members of completion of dead-lines of time-extensions given to various SR-Constituents by Hon’ble CERC for completion of their respective Protection Audit Remarks (PAR), and requested them to approach the Commission for obtaining further time-extension. The PAR-Timelines of various SR-Constituents are given at Annexure-II.

Briefed members of the Grid Disturbances that took place at NTPL on 14/15th March, 2016 and stated that the events would be discussed in detail later in the meeting to identify root cause and remedial measures to be taken.

Apprised members that in pursuance with the decision taken in 26th SRPC meeting, steps had been initiated to procure Protection Suite (Protection Management Suite or PMS) that comprises web-based management software and protection setting calculation tool through PSDF funding. And informed that a model PMS Tender Document (Annexure-III) proposed to be bid out would be discussed later in the meeting.

22. Confirmation of the Minutes of the 51st PCSC meeting held on 25.02.2016

SE (Protection), SRPC stated that the Minutes of the 51st meeting of the PCSC had been circulated vide SRPC letter No. SRPC/SE-III/ PCSC-51/ 2016/ 1702-35 dated 16.03.2016. As no observations had been received from any of the Constituents, the Minutes of the 51st meeting of PCSC were confirmed.

3. Details of Grid Disturbances (GD’s), Grid Incidents (GI’s), Line Trippings due to Auto-Reclose non-operation and PLCC mal- operation.

The trippings due to GD’s, GI’s, Auto-Reclosure failure/ non-operation, and PLCC mal-operation

that had occurred during the period February - March, 2016 were discussed in the Meeting. The deliberations and recommendations of the PCSC-forum are enclosed at Annexure–IV.

Minutes of the 52


4. Status of pending PCSC recommendations The status of implementation of pending PCSC recommendations was discussed in the meeting.

The Constituents had been requested to kindly submit the status of their compliance latest by 25-04-2016. The updated status of the same as on 15-04-2016 is enclosed at Annexure–V.

5. Remedial measures/ Action taken for the tripping incidents of the transmission elements

under forced outage The tripping incidents of the transmission elements under forced outage for which the remedial

measures/ actions taken still awaited were discussed in the meeting. The Constituents had been requested to kindly furnish the remedial measures/ action taken in time so as to forward the same to Central Electricity Authority. The updated list of the same as on 15.04.2016 is enclosed at Annexure-VI.

6. Certificate for Healthiness of Batteries

As per the MoP/ CEA direction given in pursuant to recommendations of the Enquiry Committee (NEW grid disturbance on 30th & 31st July, 2012), RPC’s are required to obtain from their respective Constituents the monthly certificate for healthiness of batteries, installed at 220 KV and above voltage level Substations (for power supply to Relays, RTUs and PLCC equipment) and furnish the same to CEA/ MoP. With reference to above, the Constituents have been requested to submit the certificate on healthiness of batteries on monthly basis (i.e. status for a month may be sent by the 7th day of the following month) to SRPC. The sought status for the month of February, 2016 has not been received from the following SR-Constituents:

TANGEDCO, NTPL, CEPL & SEL

7. Review of Islanding Schemes for Southern Region The issue of reviewing Islanding Schemes of Southern Region as enclosed at Annexure-VII was

first discussed in the 51st meeting held on 25.02.2016, when it was highlighted that Load Generation Balance of Hyderabad and Chennai Islands had not been achieved. It was then assured by the concerned Constituents that the details of (i) load relief from df/dt and AUFR relays, (ii) participating generators, and (iii) participating loads to be considered in various Islanding Schemes would be furnished by 25.03.2016 for finalization.

However, as TSTRANSCO and TANTRANSCO had not provided the requisite data, the

Constituents were informed of the need and urgency of providing sought details without further delay and requested them to ensure that the complete data is furnished latest by 10.04.2016.

As it was felt that completion of above exercise would take some time, it was also agreed that

SRLDC, as a temporary measure, would review the existing Islanding schemes by appropriately

Minutes of the 52


extrapolating the existing data, and make available the thus reviewed schemes by 09.04.2016 for taking up with the Constituents.

8. Model Tender Document for Protection Management Suite (PMS) The model tender document circulated vide Additional Agenda was discussed with a view to

obtain Constituents’ feedback. In this regard, TSTRANSCO sought to provide a feature to optionally embed 132/ 110 kV network also into the proposed PMS database. Similarly, KSEB suggested that the proposed protection suite software should be capable of carrying out Automatic Fault Analysis by interfacing with STU’s protection database. It was also felt necessary to increase maintenance period beyond five years, and make it obligatory for the system provider to ensure software & hardware compatibility for whatever upgrades that may be provided during the maintenance period.

It was agreed to modify Tender Document so as to incorporate above suggestions. It was also agreed (i) to form a Bid Evaluation Committee (BEC) from among SRPC Constituents

for evaluating technical and financial bids, and (ii) to open a bank account by name “SRPC Establishment Fund” to manage the proceeds that would be received as part of tendering process. The Bid Evaluation Committee (BEC) would be consisting of representatives from KPTCL, KSEB, PGCIL (SRTS-II), SRLDC, and SRPC Secretariat.

9. Over Voltage Relay (OVR) Grading for 765 kV & 400 kV lines of the Southern Region In the past one year, a number of new transmission lines (both at 400 kV and 765 kV) have been

added to SR-Grid in addition to reconfiguration (including LILO) works of the existing transmission lines. In this regard, a comprehensive exercise for OVR grading 400 kV & 765 kV transmission lines of SR (existing as on March, 2016) has been done, and the new OVR Gradings proposed to be adopted for these lines (along with study results), have been circulated to all Constituents for any modifications/ omissions/ comments vide Additional Agenda of PCSC-52 issued vide SRPC letter no: SRPC/SE-III/PCSC-52/2016/1839-72 dated 24.03.2016.

In this regard, a Note on the general methodology being adopted for OVR grading of

transmission lines is enclosed at Annexure-VIII for kind reference. The final OVR gradings to be adopted for 400 kV lines after incorporating Constituents

suggestions (along with study results) is enclosed at Annexure-IX. All Constituents are requested to adopt these OVR settings as applicable to their respective system. The settings have also been kept in SRPC website for easy reference.

In the meeting, while there was consensus on adopting the proposed OVR grading for 400 kV

transmission lines after suitably incorporating Constituents’ comments, it was decided to refer the gradings to be adopted for 765 kV transmission lines to OCC forum for the reasons brought

out in the above Note.

Minutes of the 52


10. TANTRANSCO Agenda Items. TANTRANSCO vide their letter No. CE/P&C/SE/D/EEPC 4/AEE 3/F.SRPC/D.42 /16 dated

05.03.2016(Annexure-X) requested to review earlier PCSC recommendation regarding using different make relays at their Alamathy and SV Chatram substations.

In this regard, the wisdom in going for different make or at least different type (though of same

make) relays for Main-1 and Main-2 line protection as recommended by CBIP and Ramakrishna Committee guidelines has been discussed. It is made clear that since the relays make use of different software logics and hardware components to accomplish a certain protection function, the chances of both relays getting failed simultaneously under adverse conditions can be minimized by using relays of different make or at least of different type. In this regard, the recent Grid Disturbance that occurred at NTPL, Tuticorin on 14.03.2016 was cited as example, where both Main-1 and Main-2 relays (being of same make) were failed in providing line protection. By replaying the corresponding DR subsequently in another relay of different make, it was observed that line protection was effective.

It is therefore recommended that the endeavor should be to use relays of different make for

Main protection, and where this is not possible at least the relays of different type should be provided for Main protection.

TANTRANSCO is requested to kindly consider the above, and implement accordingly.

11. PGCIL (SR-II) Agenda Items. PGCIL (SR-II) vide their mail dated 26-03-2016 requested to include the communication from

TANTRANSCO (Annexure-XI) regarding Implementation of SPS for averting ICT loading at Arasur SS. The issue was discussed in the meeting, wherein PGCIL (SR-II) had proposed the following SPS scheme for achieving it:

Minutes of the 52


The above scheme was agreed for implementation. 12. KSEB Agenda Items.

KSEB vide their mail dated 29.02.2016 requested to discuss certain issues regarding implementing Ramakrishna Committee guidelines in 220 kV feeders. These issues circulated vide PCSC-52 Agenda were discussed (Annexure-XII) in the meeting, and Constituents had taken note of them.

13. Network configuration changes

As per the information furnished by SR-Constituents to the OCC forum in their 117th meeting

(held on 10.03.2015; Minutes circulated on 29.03.2016), it is formed that no configuration changes (additions/ deletions/ modifications of transmission elements) took place in the southern grid during February, 2016.

14. Instances of SPS Operation

Based on the information furnished by SRLDC, it is informed that the following instances of SPS operation took place in SR during the period 25.02.2016 – 29.03.2016.

Sl No

Date Time (hrs)

Reason Load relief obtained (MW)

AP KAR KEL TN Total

Minutes of the 52


1 08-Mar-16 1:29 Talcher-Kolar SPS operated as pole-1 tripped 410 600 163 405 1578


3 14-Mar-16 1:36 Raichur-Sholapur SPS operated 88 100 0 64 252
















15. Compliance of Hon’ble CERC Orders

15.1 Petition No. 146/MP/2013 with I.A. 36/2013: Order dated 20.02.2014

Compliance of Regulations 5.2 I of the Grid Code: Issue regarding non-furnishing of FIR / Trip Analysis Report, EL, DR, etc. was also highlighted. It is pointed out that the above reports are to be submitted / uploaded on SRLDC web application within 24 hours as mandated under IEGC / CEA Regulations.

Implementation of Phase-I and Phase-II of Protection Audit Recommendations: All the constituents are requested to submit the updated status of the compliance (those who have not completed recommendations mentioned in the Phase I and Phase II) to SRPC Secretariat at the earliest.

Compliance of Regulations 5.2 (e) & 5.2 (l) of the Grid Code and Regulation 3(1)(e) of CEA Grid Standards: The constituents are requested to strictly comply with these provisions by ensuring standard protections systems having the reliability, selectivity, speed and sensitivity to isolate the faulty equipment and protect all components from any type of faults, within the specified fault clearance time and providing protection coordination

Ensuring proper maintenance of transmission lines and adopting best O&M practices: The constituents are requested to conduct line patrolling regularly as per the SRPC transmission line patrolling guidelines (available under the menu item “All Uploads Operation Miscellaneous Transmission Line Patrolling Protocol / Guidelines for Southern Region” on SRPC website). (http://www.srpc.kar.nic.in/website/2014/operation/patrolling.pdf).

http://www.srpc.kar.nic.in/website/2014/operation/patrolling.pdf

Minutes of the 52


15.2 Petition No. 167/Suo- Motu/2012: Order dated 22.02.2014

The Constituents are requested to follow approved protection philosophy

ISTS licensees are requested to submit details of updated distance protection relay setting of all inter-regional lines to POSOCO & RPCs.

All SLDCs are requested to install/activate sound recording system in their control rooms within three months from the date of issue of this order.

The Constituents are requested to submit the progress of implementation to SRPC and SRLDC as specified in the Hon’ble CERC Order.

15.3 Petition No. 263/MP/2012: Order dated 19.12.2013

Constituents are requested to implement the quantum of relief by AUFR and df/dt relays by identifying additional feeders and keep them functional within one month of issuing this order.

SLDCs are also requested to map these relays on their respective SCADA system within three months of issuance of this order.

The Constituents are requested to submit the progress of implementation to SRPC and SRLDC as specified in the Hon’ble CERC Order.

15.4 APTRANSCO’s Petition No.95/MP/2015: Date of hearing 09-04-2015

It was noted in the Analysis and Decision part of the Order that:

“8. Noting the submissions of the petitioner, SRPC and SRLDC and activities initiated by the petitioner for procurement of materials required for implementation of the remarks of protecting audit, we allow time to the petitioner till 31.12.2015 for completion of our directions in Order dated 19.12.2013 in Petition No. 146/MP/2013.”

“9. SRPC is directed to monitor the status of completion of works relating to protection audit remarks in respect of 7 nos 400 kV sub-stations and 11 nos 220 kV sub-stations of APTRANSCO, protection audit remarks in Protection Coordination Sub-Committee (PCSC) meetings and coordinate the periodic protection audit to be carried out in Southern Region after deliberation in SRPC and submit bi-monthly report to the Commission.”

15.5 TSTRANSCO’s Petition No.83/MP/2015: Order dated 14-05-2015

It was noted in the Order that:

“12. Noting the submission of the petitioner, SRLDC and SRPC and considering the actions already initiated by the petitioner for implementation of works relating to protection audit, we allow time till 31.10.2015 and 31.8.2016 for implementation of Phase-I and Phase -II works respectively. The petitioner is directed to submit affidavit confirming the completion of Phase I of protection audit remarks by 31.10.2015 and Phase-II of protection audit remarks by 31.8.2016.

13. SRPC is directed to monitor the status of completion of remarks in these substations vis-à-vis protection audit remarks in Protection Coordination Sub Committee (PCSC) meetings. SRPC is further directed to coordinate the periodic protection audit to be carried

Minutes of the 52


out in Southern Region after deliberation in SRPC.”

15.6 Order in Petition No. 86/MP/2014 and 374/MP/2014: Order dated 18-08-2015

The time-lines given to the various SR-Constituents for completion of Phase-I and Phase-II activities of Protection Audit Recommendations vide above Order are given below:

(A) KSEBL:

18. Noting the submission of KSEBL, SRLDC and SRPC and considering the actions already initiated by KSEBL for implementation of remarks of protection audit, we allow time till 31.12.2015 and 31.3.2016 for implementation of Phase-II works and R&M works at Idduki HEP respectively.

(B) TANTRANSCO:

21. After considering the submissions of TANTRANSCO, SRLDC and SRPC, it is noted that TANTRANSCO`s request for time till 31.5.2015 for implementation of Phase–I activities of providing numerical relays for feeder protection and Auto transformer protection is already over. We allow time till 30.6.2016 for other Phase-I activities such as provision of line VT, 5 core CT, Time synchronizing with GPS, Disturbance recorder & event logger and Phase-II activities. According to SRLDC, total implementation period is 15 to 16 months for items which involve major procurement, design changes with major site modification/civil activities. Accordingly, we allow 16 months time i.e up to 30.11.2016, for Renovation and Modernization of Singarpet, Singaperumalkoil, Salem and Tondiarpet 230 kV sub-stations from the issue of the order.

(C) NLC:

22. NLC has sought time upto 31.12.2014 and 31.3.2015 for completion of Phase-I work of Numerical Relay Retrofitting and for Phase-II works of providing second battery bank of PLCC respectively. It is noted that the completion dates for Phase-I and Phase-II of protection audit remarks as requested by NLC are already over. Therefore, no direction is required in this regard. However, we direct NLC to file a confirmation report regarding completion of protection audit works for Phase-I and Phase-II.

(D) KPTCL:

23. …

…

Considering the submission of KPTCL and SRLDC, we allow time to KPTCL time till 15.01.2016 for completion of Phase-I and Phase-II of protection audit remarks. No further extension shall be granted in this regard.

(E) KPCL:

24. …

…

Considering the submission of KPCL and SRLDC, we allow time to KPCL till 31.10.2015 and 31.12.2015 for completion of Phase-I for Phase-II of protection audit remarks respectively. No further extension shall be granted in this regard.

26. We direct SRPC to (a) submit status of protection audit remarks in respect of APGENCO,

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NTPC (SR), Talcher, Puducherry, PGCIL (SRTS I & II), MAPS and TANGEDCO, (b) monitor the status of completion of remarks of protection audit in respect of all constituents of Southern Region in Protection Coordination Sub-Committee (PCSC) meetings, and (c) to coordinate periodic protection audit to be carried out in Southern Region after deliberation in SRPC. All the constituents of Southern Region are directed to file their status with SRPC on regular basis to facilitate proper monitoring in PCSC meetings. SRPC is directed to submit bi-annually status report to the Commission confirming the completion of Phase-I, Phase-II and R&M works of protection audit remarks of the constituents of Southern Region.

16. Nomenclature for naming various files uploaded in Web based Tripping Monitoring System of SRLDC Portal

The nomenclature to be followed by the Constituents in naming various files (FIR, DR, EL, TR) corresponding to a tripping incident was brought out in the SRPC letter No. SRPC/ SE-III/ PCSC-45/ 4609 – 649 dated 26.06.2015 and in the minutes of PCSC-45 issued vide SRPC letter No. SRPC/SE-III/ PCSC-45/ 2015/ 5422-455 dated 21.07.2015. As illustrated therein, the format to be followed for the user entered part-name is given below:

Transmission Element File name to be given by the user

Transmission line SSN_DSN_line#_FT

Inter-connecting Transformer SSN_ICT#_FT

Generating Transformer SSN_GT#_FT

Generating Unit SSN_Unit#_FT

Where, SSN = Source Station Name/ From end Station Name/ Sending end Station Name

DSN = Destination Station Name/ To end Station Name/ Receiving end Station Name

FT = File Type (FIR/ DR/ EL/ TR)

All SR-Constituents are requested to kindly intimate the above file naming nomenclature to all the concerned and ensure that it is followed at all stations in their control area so that tripping analysis can be done systematically.

17. Date & Venue of the next Meeting

It is informed that the 53rd PCSC meeting will be held on 28.04.2015 (Thursday) at 10:30 hrs in the Conference Hall of SRPC, Bengaluru.

*****

Minutes of the 52


Annexure- I

1/6

Annexure- I

2/6

Annexure- I

3/6

Annexure- I

4/6

Annexure- I

5/6

Annexure- I

6/6

PAR Timelines of SR-Constituents

The timelines given by Hon’ble CERC to various SR-Constituents for the completion of their respective Phase-I and

Phase-II works of Protection Audit recommendations are given below:

Sl.

No

Constituent CERC

Petition No.

/Date of

Order

Date for

completio

n of

Phase-I

activities

Date for

completion

Phase-II

activities

Remarks

1 APGENCO 146/MP/2013

Date of Order

: 20.02.2014

Affidavits dt:06.09.2014 &

17.09.2014 were filed on

behalf of APGENCO in

CERC duly stating that the

implementation of Phase-l &

Phase-II activities of

Thermal & Hydel Stations

would be completed by 31-

05-2015 & 31-12-2015

respectively, pursuant to

CERC order dated

20.02.2014 against the

Petition No.146/MP/ 2013.

APGENCO informed vide

their letter dated 17.02.2016

that the process of filing

single Affidavit on behalf of

APGENCO Thermal &

Hydel stations in CERC is

under process to consider

for extension of time up to

30.07.2016 & 31.12.2017

respectively for

implementation of all the

identified

activities of APGENCO

Thermal & Hydel

Substations.

2 APTRANSCO 95/MP/2015

Date of Order

: 27.4.2015

31.12.2015 31.12.2015 APTRANSCO informed

vide their letter dated 11-

03-2016 that they have

submitted the interlocutory

application in Petition No.

95/MP/2015 before Hon’ble

CERC on 09-03-2016

seeking extension of time

up to 31-08-2016 for

completion of Phase-I and

II of Protection Audit

Recommendations.

3 TSGENCO 146/MP/2013

Date of Order

: 20.02.2014

TSGENCO made Affidavit

dt: 16.12.2014 on status of

implementation of Phase-I

and Phase-II activities

pursuant to CERC order

dated 20.02.2014 (Petition

No. 146/MP/2013) and

informed to

complete the above subject

work on 31.08.2015.

TSGENCO informed that

their management is in the

process of filing an

application before CERC

for obtaining further time

extension.

Annexure- II

1/3

4 TSTRANSCO 83/MP/2015

Date of Order

: 14.5.2015

31.10.2015 31.08.2016 TSTRANSCO informed

that Phase-I activities are

under advanced stage of

completion as Erection &

commissioning of the same

are in progress.

5 KPCL 374/MP/2014

Date of Order

: 18.8.2015

31.10.2015 31.12.2015 KPCL informed that they

had filed a Petition (No.

265/MP/2015) dated

29.10.2015 before Hon’ble

CERC praying to grant an

extension of time up to

30.12.2016 for completing

the Phases I and II

activities.

The Commission in its

ROP dated 26.11.2015 for

the Petition No.

265/MP/2015 has directed

the KPCL to file additional

submission, if any, by

22.12.2015.

However, as no additional

submission has been made

by KPCL, order of Hon’ble

CERC for the petition is

awaited.

6 KPTCL 374/MP/2014

Date of Order

: 18.8.2015

15.1.2016 15.1.2016 KPTCL filed a separate

application before CERC on

07.01.2016 seeking time

extension up to 31.05.2017,

and the same is under

consideration by CERC.

7 KSEB 86/MP/2014

Date of Order

: 18.8.2015

31.12.2015

31.12.2015

(excepting

for R&M

works at

Idduki HEP

for which

time

extension is

up to

31.3.2016)

KSEB informed that they

would be filing an

application before CERC

within one month for

obtaining further time

extension up to 31.12.2017.

Annexure- II

2/3

8 TANTRANSCO 374/MP/2014

Date of Order :

18.8.2015

30.6.2016 30.11.2016

9 NPCIL 146/MP/2015

Date of Order

: 20.02.2014

01.05.2014 01.09.2014 As per the status furnished

to SRPC, out of the total 9

recommendations given

covering KAPS and MAPS,

two no. of recommendations

pertaining to MAPS are yet

to be complied with.

Note: PGCIL (SR-I & SR-II), NLC, and NTPC (excluding Talcher), and majority of the IPP’s have completed

implementation of their respective Protection Audit Works.

Annexure- II

3/3

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FileNo: SRPC/SE-III/PMS/2016/

TENDER DOCUMENT

FOR

Creation and maintaining a web based Protection Database

and desktop based Protection settings calculation tool for

Southern Regional Grid

Last Date of Receipt of Bids AAAAA up to 14:00 Hrs

Date of Tender Opening AAAAA at 14:30 Hrs

Annexure-III

of 61

No- SRPC/SE-III/PMS/2016/BBBBB Dated-CCCCC

Notice Inviting Quotations for Creation and maintenance of web based Protection Database and

desktop based Protection Settings Calculation tool for Southern Regional Grid

Sealed quotations/ offers are invited on behalf of SRPC Constituents from eligible and reputed agency for

providing services for implementation of “Creation and maintenance of web based Protection Database and

desktop based Protection Settings Calculation tool for Southern Regional Grid” under Single Stage-two

packet/envelope system.

The validity of the offer should be at least 90 days from the date of opening of this tender. The

technical bid and Price bids shall be enclosed in separate sealed envelopes marked with Tender Reference,

Tender Id “Technical/Price bid”as applicable and Tender Name. EMD and copy of receipt of tender fees paid

shall be provided in the Technical bid envelope.

Technical bid envelope and price bid envelope should been enclosed in a separate sealed envelope

superscripted Tender ID, Tender Reference and Tender Name, date and time of opening.

Sealed tenders must reach SRPC not later than AAAAA at 14:00 hrs at the following address:

Member Secretary,

Southern Regional Power Committee,

Central Electricity Authority,

No. 29, Race Course Cross Road

Bengaluru - 560 009

(S. R. BHAT)

Member Secretary

Annexure-III

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TENDER SCHEDULE:

Tender Name

Creation and maintenance of web based

Protection Database and desktop based

Protection Settings Calculation tool for Southern

Regional Grid.

Tender Reference

Tender Id

SRPC/SE-III/PMS/2016/BBBBB Dated: CCCCC

DDDDD

Type of Tender Single Stage-Two Packet/Envelope System

Last Date and Time for receipt of

sealed tender offers

AAAAA (14:00 Hrs.) (In case this date is declared a

public holiday then the next working day shall be the last

date)

Time and Date of Opening of

sealed technical bids

AAAAA (14:30 Hrs) (In case this date is declared a public

holiday then the next working day shall be the tender

opening date)

Time and Date of Opening of

sealed financial bids To be intimated in due course.

Place of Opening tender offers SRPC, Bangalore

Address of Communication

S R Bhat, Member Secretary,


Central Electricity Authority,

#29, Race Course Cross Road,

Bengaluru – 560 009

Email:[email protected]

Email:[email protected]

Contact Telephone Numbers

Website

Phone: 080-22259343, 22287205, 22282516

http://www.srpc.kar.nic.in

Annexure-III

mailto:[email protected]

http://www.srpc.kar.nic.in/

of 61

SECTION A: DEFINITIONS AND ABBREVIATIONS

The following words and expressions shall have the meanings hereby assigned to them:

(a) “Act” shall mean the Electricity Act 2003 unless otherwise specified.

(b) “Agency” shall mean the bidder

(c) "Applicable Law" means the laws and any other instruments having the force of law in India, as they may be issued

and in force from time to time; (d) “Bank” or “Banks”, refers to all scheduled Indian Banks as per the RBI current list (Schedule-II) (e) “Buyer” means the Purchaser calling for BID

(f) “Contract” means the Agreement entered into between the Purchaser and the Agency, together with the Contract

Documents referred to therein, including all attachments, appendices, annexure and all documents incorporated by

reference therein. (g) “Contract Documents” shall mean the following documents listed, including any amendments thereto be read and

construed as part of this Agreement, viz.:

i. All provisions of Tender vide Reference No: SRPC/SE-III/ PMS/ 2016/BBBBB dated CCCCC, Tender ID- DDDDD Tender Name: Creation and maintenance of web based Protection Database and desktop based Protection Settings Calculation tool for Southern Regional Grid including all Annexures/Appendices;

ii. Vendor’s response (proposal) to the NIQ, including the Bid Submission Sheet and the Price Schedules

Cost of Bid Document

Rs.XXXXX/- (Rupess XXXXX in words only) by

demand draft/bankers cheque on a scheduled

commercial bank in favour of “SRPC

Establishment Fund”. Document can be

downloaded for viewing only from,

www.srpc.kar.nic.in, www.eprocure.gov.in,

www.tenders.gov.in

Last date for Purchase of Bid

Documents EEEEE at 15:00 hrs.

EMD

Rs. XXXXX/- (Rupees XXXXX in words only)

payable as A/c payee Demand draft on any

scheduled commercial Indian bank in favor of

“SRPC Establishment Fund”.

Tender Submission mode Manual/post or by courier at SRPC, No. 29, Race Course

Cross Road, Bangalore - 560 009

Tender Value (Ex-Taxes) Rs. XXXXX/- (Rupees XXXXX in words only)

Annexure-III

http://www.srpc.kar.nic.in/

http://www.eprocure.gov.in/

http://www.tenders.gov.in/

of 61

submitted by the Supplier; iii. The Purchaser’s Notification to the Supplier for Letter of Intent;

iv. Acceptance of purchaser’s notification v. The Purchaser’s Notification to the Supplier for Letter of Award;

(h) “Contract Price” means the price payable to the Supplier as specified in the Agreement, subject to such adjustments

thereto, as may be made pursuant to the Contract. (i) “Day” means calendar day. (j) “Delivery” means the transfer of the Goods and/or Services from the Supplier to the Purchaser in accordance with the

terms and conditions set forth in the Contract.

(k) “Completion” shall mean the completion of the Related Services by the Supplier in accordance with the terms and

conditions set forth in the Contract.

(l) "Effective Date" means the date on which this Contract comes into force and effect pursuant to Clause 8 of GCC; (m) “SRPC” Shall mean Southern Regional Power Committee with responsibilities and functions as provided in the Act.

(n) “GCC” mean the General Conditions of Contract.

(o) “Goods” means all hardware, software, networking equipment and/or other equipment accessories and materials

that the Supplier is required to supply to the Purchaser under the Contract. (p) “Go Live” means the date from which the project is implemented with all functionality as envisaged in the scope of

work. Thereafter, support period shall begin.

(q) “Government” means the Government of India or any state government of India unless the context implies

otherwise.

(r) “Intellectual Property Rights” means any patent, copyright, trademark, trade name, service marks, brands, propriety

information, whether arising before or after the execution of this Contract and the right to ownership and registration of

these rights (s) "Party" means the Purchaser or the Agency, as the case may be;

(t) “Personnel" means persons hired by the Agency as employees and assigned to the performance of the Services or any

part thereof; "Foreign Personnel" means such persons who at the time of being so hired had their domicile outside the

Government's country; and "Local Personnel" means such persons who at the time of being so hired had their domicile

inside the Government's country; (u) "Project" means all Activities covered under present contract

(v) “Purchaser’s Country” shall mean India.

(w) “Purchaser” means the SRPC. It has been used to mean Owner or Purchaser in this document.

(x) “Related Services” means the services to be provided as per the requirements / conditions specified in the Contract.

In addition to this, the definition would also include other related/ancillary services that may be required to execute this

Contract. (y) “RPC” shall mean Regional Power Committee

(z) "Starting Date" means the date referred to in Clause 8 of GCC;

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(aa) "Services" means the work to be performed by the Agency pursuant to this Contract for the purposes of the Project,

as described in the Scope of Work hereto; (bb) “Subcontractor” means any natural person, private or government entity, or a combination of the above, including its

legal successors or permitted assigns, to whom any part of the Goods to be supplied or execution of any part of the

Services is subcontracted by the Supplier. Agency shall not sub-contract any part of its obligation under the present

contract. (cc) “Supplier” means the natural person, private or government entity, or a combination of the above, whose bid to

perform the Contract has been accepted by the Purchaser and is named as such in the Agreement, and includes the legal

successors or permitted assigns of the Supplier. Supplier has been used to mean Agency in this document. (dd) “The MoP” is the Ministry of Power, Government of India.

(ee) “The Site,” shall mean all identified locations within the SRPC jurisdiction, where the Supplier carries out any

installation of Goods or is required to provide any Services. (ff) "Third Party" means any person or entity other than the Government, the Purchaser, the Agency or any other party

as implied by the usage and context

(gg) “OEM” means the Original Equipment Manufacturer of any equipment / system / software / product. (hh) “Owner” means the “Purchaser” calling for BID

(ii) “in writing” means communicated in written form with proof of receipt

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SECTION B: INTRODUCTION

SRPC Secretariat on behalf of all the constituents of Southern Region requires the services of eligible and well qualified Firms/agencies for Creation and maintenance of web based Protection Database and desktop based Protection Settings Calculation tool for Southern Regional Grid. The detailed scope of the project is at Section-E.

The work shall broadly include the following deliverables which are detailed subsequently:

Database building activities Protection Setting Calculation Tool Protection Database Management System The vendor should develop and maintain a hardware setup and software package capable of meeting

the following objectives; but not limited to:

Classified database of all bay equipment and the protection system details of all bays 220kV/230kV and above for Southern Regional power system

A user friendly interface for browsing and editing the contents of the database

Tool for simulating the performance/ behavior of the protection system under all possible normal and abnormal operating conditions of the power system, including effect of changing one or more parameter setting of the relays

Diagnostics for verifying proper coordination among various protective relays

Generation of useful reports Five-Year Support Period

Need for implementation:

Southern Regional Grid comprises the electrical system of the states of Andhra Pradesh, Karnataka, Kerala, Tamil Nadu, Telangana and Union Territory of Pondicherry. System security is a critical element of power system operations and management. Having an updated information system including an up to date web based protection database and the ability to remotely run various relevant studies on it, is necessary to ensure that the protective relays will function correctly with proper discrimination to provide the requisite reliable, sensitive and selective isolation of faulty power system equipment. The ‘Task Force on Power System Analysis under Contingencies’ constituted in December 2012 on the backdrop of the 30-31.07.2012 black outs strongly recommended creation & maintenance of protection data base under RPCs. In various Protection Co-ordination Sub- Committee (PCSC) meetings of SRPC, it was also felt that a protection data base for transmission system of Southern Region is urgently needed. This tender is being called to implement the protection database system in SRPC.

Objective:

1. To build the centralized web based Protection database of the Southern region transmission system and

continuously update the same

2. To create facility to store all types of relay settings in one system irrespective of the manufacturer

3. To capture the life cycle of protection settings and template

4. To create an interface with Relay Setting Calculation engine and compute the relay settings (distance,

over current, Generator/EF/unit protection, etc...) for the different operating conditions.

5. Perform of post-mortem analysis of the faults/disturbances in the region in a quicker time as most of the

information is centrally available.

6. Establishing the system which is remotely accessible to common stake holders and having transparency

of operation.

7. To create a system where there is a provision of hierarchical Role based access control and have

reporting procedures.

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SECTION C: Instruction to Bidders

1. The Address for all communication with the purchaser shall be Member Secretary, SRPC, Bengaluru.

2. Request for clarifications if any with regard to the provisions of NIQ may be forwarded to the mssrpc-

[email protected] and [email protected] by FFFFF 15:00 Hrs.

3. Single Stage – Two Envelope Procedure: Bidders should submit two sealed envelopes simultaneously,

one containing the Technical Proposal and the other the Price Proposal, enclosed together in an outer

single envelope. The envelopes should be superscripted with Tender Name, Tender Id, Tender Reference,

Technical bid/Price bid as applicable and date and time of opening of tender.

4. Constituents: Constituent for this tender shall mean the electrical systems of the electricity utilities of the

states of Andhra Pradesh, Telangana, Karnataka, Kerala, Tamil Nadu, and Union Territory of

Puducherry, NTPC, NPCIL and NLC generating Stations of SR and PGCIL Southern regional transmission

system, SRLDC and SRPC.

5. Project completion time: scheduled implementation of all functionality as per the scope of works shall be

18 months from date of award. Thereafter there shall be a support period of 5 years from the date of Go

Live. In case services are required beyond support period the same shall be with mutual agreement

between buyer and agency.

6. Exchange Rate: For any financial figure in other than Indian rupees the exchange rate as on the date of transaction shall be considered for conversion to Indian rupee value.

7. Milestones for the project shall be as under (all from date of award): a. Submission of High level design documents for the protection software implementation:

one month from issue of letter of Award b. Delivery of 35 No base license of protection calculation engine: 2 months from

acceptance of High level design document c. Completion of Training program on the protection setting calculation software, building

the network data for load flow and fault calculation: 15 months d. Protection database and substation SLD preparation for protection study: 2 months e. Delivery of required hardware: 2 months f. Delivery of web based database management system: 2 months g. Site Acceptance Test(SAT) with one pilot state system: 6 months h. Go live with all SRPC constituent data: last 1 month i. Continuation of support activities: up to 5 years from Go Live.

8. Cancellation of contract: The period of contract is subject to cancellation of appointment due to any of

the reasons mentioned hereunder.

• If the Agency is found to have submitted false particulars / fake documents for securing empanelment as Agency or for the award of assignment.

• The Agency’s performance on the job will be constantly monitored for quality, commitment to

delivery period mentioned in contract with the Purchaser, adherence to the guidelines, Statutory regulations, Conduct / Discipline etc., while executing jobs. Any deviations from stated conditions can lead to appropriate deterrent action as deemed fit by Purchaser.

• If the Agency refuses to execute the job at his agreed scope/quoted rates, after the purchaser issue the letter of intent (LoI)

• Manipulation of rates by cartelization shall be viewed very seriously by the Purchaser. If such a situation comes to the notice of the Purchaser and/or there are reasons / circumstances for the Purchaser to believe so, the concerned Agency will be called in to give justification of proposal/rates quoted by them. If they are not able to give a proper or satisfactory justification of their quoted proposal/rates, their appointment is liable to be cancelled.

• Any other reason deemed fit by the competent authority/purchaser for cancellation • Such Agency’s, whose appointment is cancelled due to any of the above reasons, will not be

considered for subsequent assignments for a period of Five years.

9. Language of BID: The language of the bid shall be English

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10. Number of Copies of BID: Two nos of Hardcopies (one marked as “original” and one marked as “Copy”

and 1 Softcopy in CD should be submitted. Each technical proposal should be marked "Original" or "Copy" as appropriate. If there are any discrepancies between the original and the copies of the Proposal, the original governs. In the event of any discrepancy between the hard copy and soft copy, the hard copy shall prevail.

11. Purchase of BID:A demand draft amounting to INR Rs XXXXX/- ( Rupees XXXXX in words only) in favor of “SRPC Establishment Fund” payable at Bangalore as cost of the printing, binding, etc. of the document shall be furnished at the time of purchase of document and receipt enclosed in Technical Bid envelope.

12. Eligible Bidders: Bidders must be registered under Indian business laws. The entire work has to be

undertaken by a single agency. No consortium/ Joint Venture/Association or outsourcing shall be allowed.

13. Conflict Of Interest: The Purchaser considers a conflict of interest to be a situation in which a party has interests that could improperly influence that party’s performance of official duties or responsibilities, contractual obligations, or compliance with applicable laws and regulations, and that such conflict of interest may contribute to or constitute a prohibited corrupt practice. This may include but not limited to circumstances leading to:-

Relationship with Purchaser’s staff: Agency’s (including their personnel) that have a business or family relationship with a member of the Purchaser’s staff who are directly or indirectly involved in any part of: (i) the preparation of the TOR of the contract, (ii) the selection process for such contract, or (iii) supervision of such contract may not be awarded a contract, unless the conflict stemming from this relationship has been resolved in a manner acceptable to the purchaser throughout the selection process and the execution of the contract.

14. Subcontracting: The Agency shall not be permitted to sub-contract any part of its obligations under the

Contract with the purchaser.

15. Corrigendum: Should the Purchaser deem it necessary to amend the BID Document, it shall do so by

uploading the corrigendum in the website(s). At any time prior to the deadline for submission of the BID,

the Purchaser may amend the BID Document by issuing corrigenda. In order to provide prospective

Bidders reasonable time in which to take the amendment into account in preparing their bids, the

Purchaser may, at its discretion, extend the last date for the receipt of BIDs. Any corrigendum issued shall

be part of the BID Document and shall be communicated in writing through registered letter and/ or

Email to all who have obtained the BID Document directly from the Purchaser.

16. Cost of preparation of BID: The Bidder shall bear all costs associated with the preparation and submission

of its BID and the Purchaser shall not be responsible or liable for those costs, regardless of the conduct or outcome of the BID process.

17. Submission of BID: The Bidder shall submit the BID using the appropriate Submission Sheets provided in

the Annexures. These forms must be completed without any alterations to their format, and no substitutes shall be accepted. All blank spaces shall be filled in with the information requested.

18. BID Opening: The Purchaser shall conduct the opening of BIDs in the presence of Bidders‟

representatives who choose to attend, at the address, date and time specified in this document. All other envelopes holding the BID shall be opened one at a time, and the following read out and recorded:

(a) the name of the Bidder; (b) any other details as the Purchaser may consider appropriate.

Only BIDs read out and recorded at opening stage shall be considered for evaluation. Late bids or bids not accompanied with proof of having purchased the document shall be rejected out rightly. Bids shall be

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opened at SRPC, Bangalore.

19. Rights of Use: All rights of use of any process, product, service or facility developed or any other task

performed by the Agency during execution of the engagement for the Purchaser would lie exclusively with the Purchaser in perpetuity free from all liens, encumbrances and other third party rights and the Agency shall, wherever required, take all steps that may be necessary to ensure the transfer of such ownership in favor of the Purchaser.

20. Intellectual Property: The purchaser shall own and have a right in perpetuity to use all newly created

Intellectual Property Rights which have been developed solely during execution of the contract, including

all templates, reports, designs, records, application configurations, data and written material,

specifications, drawings and other documents which have been newly created and developed by the

Agency solely during the performance of Related Services and for the purposes of inter-alia use or sub-

license of such Services under this Contract. The Agency should undertake to disclose all such Intellectual

Property Rights arising in performance of the Related Services to the Purchaser and execute all such

agreements/documents and file all relevant applications, effect transfers and obtain all permits and

approvals that may be necessary in this regard to effectively transfer and conserve the Intellectual

Property Rights of the Purchaser. To the extent that Intellectual Property Rights are unable by law to so

vest, the Agency assigns those Intellectual Property Rights to Purchaser on creation.

The Agency shall be obliged to ensure that all approvals, registrations, licenses, permits and rights etc. which are inter-alia necessary for use of the goods supplied / service provided by the Agency, the same shall be acquired in the name of the Purchaser, and the same may be assigned by the Purchaser to the Agency solely for the purpose of execution of any of its obligations under the terms of the Contract. However, subsequent to the term of the Contract, such approvals, registrations, licenses, permits and rights etc. shall endure to the exclusive benefit of the Purchaser. The Agency shall ensure that while it uses any software, hardware, processes, document or material in the course of performing the Services, it does not infringe the Intellectual Property Rights of any person and the Agency shall keep the Purchaser indemnified against all costs, expenses and liabilities howsoever, arising out of any illegal or unauthorized use (piracy) or in connection with any claim or proceedings relating to any breach or violation of any permission/license terms or infringement of any Intellectual Property Rights by the Agency or its personnel during the course of performance of the Related Services. In case of any infringement by the Agency, the Agency shall have sole control of the defence and all related settlement negotiations. Subject to above sub-clauses on intellectual property, the Agency shall retain exclusive ownership of all methods, concepts, algorithms, trade secrets, software documentation, other intellectual property or other information belonging to the Agency that existed before the effective date of the contract.

21. Area of Work: The Agency may be required to work anywhere in the state or union territory of India

within the concerned area of the Purchaser.

22. Confidentiality: The Agency and the personnel of any of them shall not either during the term or within

two (2) years after the expiration of this contract, disclose any proprietary or confidential information relating to the Project, the Services, this Contract or the Owner’s business or operations without the prior written consent of the owner. Purchaser will ensure confidentiality of the bids submitted.

23. Bid Security / Earnest Money Deposit (EMD): The Bidder shall furnish as part of its Technical Proposal, a

Bid Security in original form and in the amount and currency specified below. The EMD shall be payable in form of Demand Draft in favor of “SRPC Establishment Fund” payable at Bangalore drawn on any scheduled commercial bank. Earnest Money Deposit for the tender shall be Rs. XXXXX (Rupees XXXXX in words only). Earnest Money will not fetch any interest. The EMD made by the bidder will be forfeited if:

i. The bidder withdraws his tender before processing of the same. ii. The bidder withdraws his tender after processing but before acceptance of “Letter of award”

issued by SRPC. iii. The selected bidder withdraws his tender before furnishing an unconditional and irrevocable

Performance Security Deposit.

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iv. The bidder violates any of the provisions of the terms and conditions of this tender specification.

The EMD will be refunded subject to:

i. To the successful bidder, only after furnishing an unconditional and irrevocable Performance Security Deposit for 5% of the contract price.

ii. To the successful bidder if for any reasons beyond the control of the purchaser, the purchaser fails to award LOI within one month of the date of acceptance of tender by the agency.

iii. To the unsuccessful bidders, after acceptance of the “Letter of Award” by the selected bidder.

24. Price Offer:The Bidder may provide ONLY ONE Price bid. In case of more than one price bid, the submission will be considered non-responsive. Prices will be firm and inclusive of all cost minus taxes and no change alternate/conditional price offers shall be allowed. The price offer shall be firm and no escalation would be allowed

25. Performance Security: Within twenty-eight (28) days of the issue of Letter of Intent from the Purchaser,

the successful Bidder shall furnish the Performance Security in accordance as provided below. The value

of Performance Security would be 5% of the bid value/contract price.

The successful bidder will have to furnish a Performance Security Guarantee Deposit @ 5% of the bid

value/contract price in form of an irrevocable bank guarantee as per format at Annexure G from a

scheduled commercial bank within 28 days after the issue of Letter of Intent (LoI).

This guarantee will be for faithful performance of the contract in accordance with the terms and

conditions and technical specification specified in the contract bid documents. The purchaser shall be at

liberty to deduct appropriately from the Performance Security Deposit such sums as are due and payable

to the agency by purchaser as may be determined in terms of the contract.

The performance guarantee shall remain valid for a period of 60 days beyond the support period of five

years from the date of project ‘go live’ and shall be renewed for a further period, if required so by the

purchaser. Performance Security Guarantee in form of bank guarantee will be discharged and returned

to the successful bidder after satisfactory performance of all the terms and conditions of contract.

26. Bid Validity Period: Bid should be valid for a period of 90 days from the date of opening of proposal.

27. Acceptable Banks: All bank related documents should be submitted only from a bank listed in Schedule-2 of Reserve Bank of India (RBI).

28. Currency of Contract: The currency of contract shall be Indian Rupees only.

29. SRPC shall mean the Southern Regional Power Committee as defined under the Electricity Act, 2003 and

having its secretariat at No. 29, Race Course Cross Road, Bangalore - 560 009and headed by Member Secretary.

30. The website of SRPC is at www.srpc.kar.nic.in

31. Purchaser/owner shall mean the SRPC.

32. The competent Authority for this Tender shall be The Member Secretary, SRPC.

33. The competent Authority reserves to cancel this tender without assigning any reason whatever.

34. Part bids, incomplete bids will not be accepted. No part of this tender may be outsourced under any circumstances.

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35. The competent authority reserves the right to postpone and/or extend the date of receipt of tender or to withdraw the tender notice without assigning any reasons thereof. In such an event, bidders shall not be entitled to any compensation, in any form whatsoever.

36. Terms and Conditions described in this NIQ shall be binding on all bidders. 37. All entries in the tender forms should be legible and filled clearly. If the space for furnishing information

is insufficient, a separate sheet duly signed by the authorized signatory may be attached. 38. Each page of this tender document/NIQ should be signed by the bidder or by the authorized signatories

with seal of the agency and require to be enclosed with the technical bid. Signing each page of this document will be implied as its acceptance in unequivocal manner with clear understanding and interpretations.

39. All pages in technical and commercial bid/response documents shall be stamped with the official company seal and duly signed by the authorized signatory.

40. The offer shall be of single stage-two packet/envelope type, containing Technical and Price offers. Two separate sealed envelopes containing the Technical and Price offers separately should be enclosed together in a large envelop, sealed and superscripted with the Tender Reference Number, Tender ID, Tender Name, Name and address of the Bidder. Tender Offer without separate envelops for technical offer and price offer will be rejected outright.

41. Even if the tender document is downloaded from the website, the tender must necessarily be purchased by the last date of purchase of bid documents.

42. Late bids: Any bid received by courier/post/by hand after the deadline for submission of bids prescribed, shall not be accepted.

43. The envelope shall be sealed by signing across all joints & pasting good quality transparent adhesive tape on top of such joints & signatures with company seal. Proposals sent through telex/telegrams/fax/e-mail shall not be accepted. SRPC shall not be responsible for delay on account of delivery by the postal authorities as well as courier companies. Such delivery shall be at the risk and cost of the bidder. If the envelopes are not sealed and marked as required above, SRPC shall assume no responsibility for the proposal’s misplacement or premature opening.

44. Bidder is expected to examine all instructions, forms, terms and requirement in the bid document. The invitation to bid together with all its attachment thereto shall be considered to be read, understood and accepted by the bidder in full and binding manner. Failure to furnish all information required by the bid document or a bid not substantially responsive to the bid document in every respect may result in rejection of the bid.

45. The language of the bid shall be English. All documents enclosed should also be in English language. In case the original document is in a different language, a certified true translation in English language must be furnished, in which case, for purposes of interpretation of the bid, the translation shall govern. All such translated documents should bear the signature and stamp of the authorized signatory of the bidder signing the document, as a token of authentication of the same.

46. The bidders will have to accept unconditionally all the Terms and Conditions of NIT along with an undertaking in support of the authenticity of the declarations regarding the facts, figures, information and documents furnished by the Bidder in order to become an eligible bidder. Conditional bids against the terms of the bid may be rejected upon sole discretion of purchaser.

47. Based on undertaking furnished by the bidder, as per format given at Annexure-E, certifying the authenticity and statement made in the bid,If any information or document submitted by the bidder is found to be false/incorrect, the offer shall be considered absolutely null and void and penal action as deemed fit shall be taken against the bidder which may include termination of contract / forfeiture of all dues including EMD/ Security Deposit / banning of the firm along with all partners of the firm as per provisions of law. Further, suitable action shall be taken for claiming damages from the bidder.

48. SRPC reserves the right to accept or reject any or all offers in part or not to make any procurement against this tender, without assigning any reasons. No dispute of any kind can be raised against this right of the SRPC in any court of law or elsewhere.

49. No deviation from the terms and conditions mentioned in this tender shall be accepted.

50. The purchaser shall be entitled and it shall be lawful on his part to forfeit the amount of Performance Security in whole or in part in the event of any default, failure or neglect on part of the agency in

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fulfillment or performance of the contract under reference in all respects to the satisfaction of the purchaser. The purchaser shall be entitled to deduct from the amount of Performance Security any loss or damage which the purchaser may suffer due to any act or default of the Agency as per stipulations of the contract.

51. In the event of termination of agreement for any reasons, or in the event the successful bidder is discharged of its obligations clauses 36-39 of GCC shall be applicable

52. Tender documents are not transferable. Bidders must buy the tender documents in their own name.

53. A tender offer determined as not substantially responsive will be rejected by the purchaser and the price

bid for such Bidder will not be opened.

54. The Purchaser may waive any minor infirmity or irregularity in a Tender offer, which does not constitute a material deviation. This shall be binding on all Bidders and the Purchaser reserves the right of such waivers.

55. After award and before starting of work the selected agency shall give a presentation detailing the proposed architecture and their work plan, support services required and deliverables.

56. The Bidder will be responsible for sizing the hardware to support the scalability and performance requirements of the protection database application. The Bidder shall ensure that the servers are sized adequately and redundancy is built into the architecture required to meet the service levels mentioned in the NIQ.

57. The IT Infrastructure proposed should be compatible with infrastructure at SRPC and constituents. 58. The Bidder will be responsible for providing all the details of the Bill of Material (BoM) and specifications

of the IT Infrastructure proposed, specifications of the system software, all other equipment proposed as part of its Technical Proposal. The price quote submitted by the Bidder should include costs for these.

59. After completion of the 5-year support period the successful agency will provide a proposal for AMC which may be accepted /declined by the purchaser.

SECTION D: SCHEDULE OF REQUIREMENTS

1. Deliverables: j. High level design documents for the protection software implementation. k. Web based database management tool-1 License l. Protection calculation & Analysis tool with laptop computers - 35 Licenses m. User Manuals- 35 sets n. Associated servers for installation and Deployment of application and database software

along with standard Operating System -8 Nos. (communication is excluded in the scope) o. Training for 5 days at SRPC/SRLDC premise and 5 days at each Constituent premise

including printed reading material/soft files. p. 5 year comprehensive Support including incorporation of any new network configuration,

addition of new substation, change of relays, settings, CT/PT, support for database software, web access and various analysis engines.

2. Minimum Hardware BOQ and Specifications:

Sl No Hardware Description Qty Required

1

Application server with following configuration: Quad Core 3.06 GHz X 2, 64 GB RAM, 500 GB HDD, 4 USB port, 18.5” monitor supporting 1024 X 1024, Standard Key Board & Mouse, Windows Server 2012 R2 Operating System

2 No

Main and backup

2

Database server with following configuration: Quad Core 3.06 GHz X 2, 64/128 GB RAM, 1 TB HDD, 4 USB port, 18.5” monitor supporting 1024 X 1024, Standard Key Board & Mouse, Windows Server 2012 R2 Operating System

2 No

Main and backup

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3

Database Historian server with following configuration: Quad Core 3.06 GHz X 2, 64 GB RAM, 8 TB HDD, 4 USB port, 18.5” monitor supporting 1024 X 1024, Standard Key Board & Mouse, Windows Server 2012 R2 Operating System,

2 No

4

Web server: Quad Core 3.06 GHz X 2, 64 GB RAM, 500 GB HDD, 4 USB port, 18.5” monitor supporting 1024 X 1024, Standard Key Board & Mouse, Windows Server 2012 R2 Operating System

2 No

5 The database license with Oracle 11G and above. Enterprise

license.

6

Laptop systems (intel core i5-4210U processor 4GB RAM 500 GB HDD, 14’ LED, Win 8 Pro, Minimum 2 USB Ports) along with three year Antivirus for the SRPC constituent member for installation of protection setting calculation tool

35 No Total

7 Protection setting calculation tool to be installed in the laptop

35 Licenses

8 Web based database management tool 1 License

9. Hardware and Software Firewall As applicable

10. Support for the period for the components supplied including hardware and software.

As detailed in E.5

SECTION E: DETAILED SCOPE OF WORK

Bidder should supply Protection Analysis Software Package with following requirements but not limited to the

following modules for the supply of Software and Database building activities:-

Broad scope of supply includes following.

1. Database building activities

2. Protection Setting Calculation Tool

3. Protection Database Management System

4. The vendor should develop and maintain a hardware setup and software package capable of meeting the

following objectives; but not limited to:

Classified database of all bay equipment and the protection system details of all bays 220kV/230kV and

above for Southern Regional power system

A user friendly interface for browsing and editing the contents of the database

Tool for simulating the performance/ behavior of the protection system under all possible normal and

abnormal operating conditions of the power system, including effect of changing one or more parameter

setting of the relays

Diagnostics for verifying proper coordination among various protective relays

Generation of useful reports

5. Five Year Support Period

E.1 Database building activities:

One time power system network model building for the Load-flow, Short circuit and dynamic simulations of entire Southern region with Indian national grid transmission network model.

Data collected from respective substations to be validated before populating the same in the database.

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Complete modeling of SR transmission network for 220 kV/ 230 kV and above including HVDC systems connected with SR, with relevant system parameters collecting from the field like transmission lines, generators, transformers, reactors, substation layouts, and associated protective relays in the substations. The model should include CT, PT, Isolator, Breaker and other bay equipment’s ratings along with rating of the BUS and the type of conductor used for the BUS. The modeling should be done as per bus-breaker philosophy instead if node oriented model.

Building of network Database and populations of relay data for all existing substations of 220 kV / 230 kV and above voltage level, of Southern region including Generating station switchyards as well as the Generators.

Prepared network should be ready for base case load flow analysis and the same has to be verified with field engineers of SR constituents. Both MW and MVAR flow should be computed and Voltage Level at different Buses should be ascertained along with suggestive conditions to reduce or enhance Bus voltage.

Short circuit, transient stability and contingency analysis have to be simulated and the results have to be demonstrated to the SR constituents for approval. There should be features to study low frequency oscillations, 3

rd zone tripping, PSS tuning support and Voltage collapse prediction feature.

Transient stability and grid disturbance simulation studies for the southern region database and performing the com-trade file analysis.

Over current and distance relay coordination settings have to be calculated and coordination curves should match the existing protection schemes of the substations. Some critical contingencies have to be discussed with SR constituents and the same has to be simulated and results to be demonstrated.

Computation of critical clearing time for the most of the voltage level and critical stations.

Review of the unit protection like Generators, GT’S, Unit transformers, Station transformers), ICTs, Main power transformers, Reactors, Dynamic and Static Compensators, bus-bars and other differential protection relays.

Following are estimated details of the existing sub-station in the SRPC region and same should be modeled in the software with all details. However, actual number may vary within close limits and has to be considered by the bidder in his proposal.

No. of 765 kV sub-station

No. of 400 kV sub-station

No. of 220/230 kV sub-station

6 111 478

Capacity building and training at SRPC office and each state.

E.2 Protection Setting Calculation Tool

This module gives new relay settings for improved performance and computes panel settings for type of distance/over

current/EF/differential/line/transformer protection relays. Relay co-ordination will be conducted for relays of all make

and with user defined characteristics for over current and distance relays in line with the protection philosophy,

followed by SRPC.

The practice of protection engineering involves fault studies followed by relay setting, checking and co-ordination

studies. These studies are necessary in order to ensure that the wide variety of protective relays function correctly

with proper discrimination to provide the required reliable, sensitive and selective isolation of faulty power system

equipment.

Relay co-ordination for radial and interconnected power system networks for over current relays.

Primary/back-up relay pairs generation.

Fault calculation will be a part of relay co-ordination program.

Transparent Fault calculation results.

Built with standard relays library data for different manufacturers, including but not restricted to the

following protection features

i. Line protection: Distance, over current, earth fault, over voltage

ii. Line Differential protection

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iii. Transformer Differential Protection

iv. Transformer Over fluxing Protection

v. Transformer Thermal Overload Protection

vi. Transformer Low Impedance Restricted Earth Fault Protection and High Impedance Restricted Earth

Fault Protection

vii. Generator Overall, Generator Transformer and Unit Differential Protection

viii. Generator Inter – Turn Differential Protection (ix) Generator Transformer Low Impedance and High

Impedance Restricted Earth Fault Protection

ix. Generator Stator Earth Fault Protection ( Both 95% and 100% protection)

x. Generator Rotor Earth Fault Protection

xi. Generator Loss of Excitation Protection(Field Failure) ( with and without Under voltage)

xii. Generator Forward Power and Reverse Power Protection

xiii. Generator Back-Up Impedance protection

xiv. Generator Inadvertent energization

xv. Generator Negative Sequence Protection,

xvi. Generator Pole Slip Protection

xvii. Generator Thermal Overload Protection

xviii. Feeders Directional and Non-Directional Over current and Earth Fault Protection with standard and

nonstandard curves (User defined curves).

Plotting Log-Log grid and graphs.

Option to check existing relay settings as per the field or vice versa.

Unit protection settings computation for Generators/ line/transformer / breaker /reactor/ busbar etc.

Computation of Out of Step Tripping Protection Settings.

Display of sequence operation of relays with respect to tripping time.

Switching status for all relays elements from the screen.

Association of relays to power system elements.

Co-ordination check can be conducted for relays of all make and with user defined characteristics for over

current and distance relays.

Disturbance analysis can be done with single click on mapping of disturbances files with corresponding relay.

It has standard power system components and relay symbols.

Phase and Earth relay co-ordination. Co-ordination between Normal, Non - Directional Earth Fault and

Common Earth Fault should be provided.

Instantaneous setting for relays.

Automatic computation of zone setting.

Feature for viewing existing and newly computed relay settings simultaneously.

Pre-loaded standard relay curves.

Directional and non-directional feature for relays.

Overload factor, unbalance factor and discrimination time (user defined/selectable) for each relay.

Inbuilt discrimination time calculator.

Facility to model the back-up protection settings of generating units / GTs connected to the grid at 230 kV/

220 kV and above level, with the exception where the generator is connected to the lower voltage network

which will be considered so that coordination between power plant and transmission system protections may

also be tested / verified.

E.3 Protection Database Management System:

Web-based Enterprise license of Database tool and populating of all the relay templates and also relay field data into

the software and customizing the approval procedures.

Protection data management system is an asset management tool for maintaining information on relay attributes and

settings. The software should be capable of maintaining the entire data belonging to all relays. Once data fits in the

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software it should be capable of porting the data to any third party application for analysis and also various reports

generated. The data would be accessed over web for use in protection calculation tool.

The Protection database management system has following capabilities

1. Web based System.

2. Role based access control

3. Flexible customization of user roles, grants, actions from Master control panel

4. User Access Monitor

5. Relay Template Management

6. Create\Edit\Delete relay templates

7. Viewing relay template

8. Locking and Unlocking templates

9. Copy & Edit templates from the existing template

10. Import and Export templates

11. Relay Data management

12. Create\Edit\Delete relay data

13. Viewing relay data

14. Locking and Unlocking relay data

15. Copy & Edit relay data from the existing data

16. Import and Export relay data

17. Configuration management : Should have option to configure user defined levels for generating relay indexing

18. Work flow Management

19. Relay template life cycle management

20. Relay data life cycle management

21. Reports :

a. Possible to generate report as per user requirement

b. User can generate report in standard format like .xls, .pdf.

c. History logger: All user activities including user operations, data management, template management,

configuration management and workflow can be logged to track the user activities over a period of time

d. Import and Export: There is an option to import template and data from any third party application in

standard formats like xml and .xls format

e. Option to integrate any third party application to share data between protection database management

software and calculation engine\tool and vice versa.

f. Relay characteristics curve can be drawn from the setting data.

g. Provision to attach documents to relay template and relay data can be made available.

h. Option to accept setting data as per the audit and verify/compare the field setting with protection

database setting and generate error report.

i. Provision to store and retrieve audit reports

j. Provision to store and retrieve relay tripping incidence report

k. Facility to store and retrieve setting guidelines as per various committees.

l. Automatic Reconciliation Tool is available which will generate automatic reconciliation requests for relay

settings in the database and in the relay hardware.

m. Up-to-date application guides and user manuals of all relays is a part of the relay library.

n. Web-based Checklist for protection audit is available

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E.4 Technical Specification of Software

There must be an integration of setting calculation and database management system.

Description

General/Graphical User Interface

1. Windows based state-of the-art Graphical User Interface(GUI)

2. User friendly screens with integrated help

3. Compatible with latest Operating systems Windows 95, Windows 98, Windows 98 SE, Windows NT 4.0, Windows 2000, Windows XP, Windows 2003, Windows 2007, Windows Vista, 7, 8 and above.

4. Support for both RDBMS & ASCII data

5. Self-contained Graphic editor for generation single line diagrams that does not depend on any other drafting package such as AutoCAD.

6. Provision for exporting the Single Line diagram to AutoCAD

7. Software based on standards (IEEE/ANSI…) that are widely acceptable by national and international community.

8. Single line diagram (SLD) / Network Creation with detailed modeling of all the network elements/equipment and interfaced with relational database.

9. Module for creating SLD has advanced features as in a professional drafting / drawing package like AutoCAD. For e.g. layering, panning, zooming, real-time zoom, scaling to fit any paper size (A5toA0), printing / plotting of full diagram, selected window, current window, copy and paste options etc.

10. Different views of the same network. Meaning, there is a provision to display /print /plot SLD showing only system topology / with load flow results / with fault study results /others.

11. SLD to .PDF conversion, scaling to fit any paper size (A5toA0)

12. Flexibility in modeling the system. Meaning there is provision for

SLD-Database integrated mode for network creation

Independently draft the SLD using IEC or ANSI symbols

Data entry using interactive forms without SLD

Associate any SLD with any database at any point of time

Create input data in ASCII files

13 Automatically generates SLD from given system connectivity data

14. Different ways of executing analysis

Run any analysis directly from graphic editor

Run while interactively entering data through forms

Run studies using ASCII input files

15 User defined reports including MIS information of the system under study.

16 Reports in Standard and IEEE Formats

17 Generate reports in .csv, html format as well

18. Should have inbuilt library of all major power system equipment like Generators, lines, cables, transformers, Reactors both Line and Bus, Dynamic and Static Compensators, relays etc. The libraries have all the equipment that is widely in use by Indian Utilities and industries.

19 User friendly GUI for entering new equipment into library.

20. Software supports modeling of unlimited buses and unlimited number of other power system equipments like transformers, lines, Generators etc...

21 Provision for importing of GPS points and generating the network.

22. Performing the analysis of the single file com-trade file for the associated relay through the network element modeled.

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Software Licensing/Commercials

23. Software License is such that it can be loaded in any number of PC’s. The dongle/ hardware lock required for the functioning of the software would then be attached to which ever PC the software is required to run

24. There is a provision for further extending the license in future if required.

25. Any software upgrade within the AMC period should be free of cost

Power Flow Analysis

27. Solution methods - Gauss-Seidel, Newton-Raphson, Fast-DeCoupled, current Injection

28. Zone / Area wise modeling & control, islanding.

29. Simulating the study mode in dynamic changes in the network

30. Modeling loads as constant power, constant current, constant impedance or any combination of these.

31. Determine MVAR Compensation.

32. Contingency analysis ranking.

33. Slack Bus Concept uses Gauss - Seidel, Newton - Raphson, Fast-DeCoupled techniques.

34. Frequency dependent Load flow uses Fast-DeCoupled technique. The options available are

Flat Tie-Line Control

Flat Frequency Control

35. Optimal load flow uses Fast-DeCoupled technique. The different optimizations available are

P - Optimization

Q - Optimization

P & Q Optimization.

36. AC-DC load flow - this shall be in built feature of load flow program

37. Possible to simulate Looped and radial systems.

38. Possible to simulate Multiple Islanded systems.

39. Transmission line can be opened at one or both sides.

40. Possible to Model HVDC systems.

41. Computation of Total Transfer Capability (TTC) and Available Transfer Capability (ATC) between two Buses/Areas/Zones and estimation of Loop flows.

42. Sub Station wise load flow for utilities.

43. Simple and Detailed Wind Turbine Model considering all the four IEEE/WECC generic wind turbines

models (WT1 to WT4)

44. IEEE/WECC standard models for performing Grid Interconnection Studies, Studying Wind Plant behavior, etc. are included

45. Modeling suitable for individual Solar plant, Wind Turbine and Wind Farm (Group of Wind Turbines)

46. Provision to enter user specific Wind Power curves in various formats.

47. FACTS devices namely – SVC, STATCOM, TCSC, SPS and UPFC are modeled

48. Modeling of two and three winding transformers with auto tap, off nominal fixed tap and phase shift.

49. The real and reactive power load values, scheduled generation, reactor and capacitor values can be changed globally or zone wise using reduction factors.

50. Generator Q - check limit violations after a specified number of iterations.

51. Changing the load model from the given type to impedance type automatically, when the voltage magnitude at load bus goes below specified value to have better and realistic convergence.

52. Load shedding during under frequency to maintain the frequency at desired value.

53. Efficient memory management by using sparsity technique.

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54. Estimation of Inter regional load flow on various corridors by proper modeling of other regions of the country including all scenarios of peak/off peak, seasonal, etc.

Short Circuit Analysis

55. The module shall Compute fault level for both symmetrical and asymmetrical faults.

56. Report post-fault bus voltages, currents and impedances as seen at relay. Also fault MVA and current, Peak / crest asymmetrical and symmetrical components at fault busses.

57. Open conductor faults, traveling shunt fault simulations.

58. Option of running fault studies taking initial conditions from load flow results or flat-start.

59. Shall comply with IEC 363 & IEC 909 Fault analysis.

60. Simulation of number of faults one at a time at various buses in a single execution.

61. Computation of fault contributions from adjacent/next adjacent/all buses in the neighborhood of fault and from the user defined nodes.

62. While computing the program shall take Transformer vector groups, earthing of transformer and generator neutrals.

63. HVDC system contribution to faults.

64. Zero sequence, mutual coupling values will be taken from element modeling However, provision for

multiplication factors for the calculation of unknown zero-sequence impedance/admittance of lines/transformers, negative/zero sequence resistance/reactance of generators, negative/zero sequence impedance of loads and zero sequence impedance of series reactors/shunt reactors are there.

65. Fault MVA and current, Peak/Crest asymmetrical current and symmetrical components at the fault bus are reported.

66. Wind Turbines contribution to Faults for all the four IEEE/WECC generic wind turbines models (WT1 to WT4)

Transient Stability Studies

67. Study of system stability for various faults and disturbances.

68. Study the effects of sudden load / generation variations.

69. Modeling of cyclic loads and different types of synchronous machine.

70. User defined modeling of loads such as constant power / current / impedance or as any combination of the three

71. Motor starting analysis is inbuilt.

72. Built in standard IEEE type voltages regulators, AVR, governors, static VAR compensators, power system stabilizers

73. Support for user defined control system

74. Reports critical fault clearing time to aid in deciding rating of various equipment’s.

75. Study of machine swing curves at various machines and its states

76. Simulation of user-specified number of disturbances.

77. Disturbances that can be simulated are listed below:

1. Change in transformer parameters (for changing number of transformers in parallel, tripping and reconnecting transformer)

2. Change in transmission line parameters (for changing the number of circuits, tripping and reconnecting transmission line)

3. Change in real and reactive power of the load.

4. Change in shunt impedance

5. Change in load model

6. Change in number of generator sets.

7. Total generation outage.

8. Single line to ground fault with pole reclosure.

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9. Three phase to ground fault with auto-reclosure.

10. Loss of excitation

11. Motor starting studies

78. Possible to simulate Load shedding schemes.

79. Simulation of operation of voltage/current/frequency relays and distance relays.

80. Load modeling according to user-defined load characteristics as a constant power / current / impedance or as a combination of all the three.

81. Simulation of over/under frequency and df/dt relays for different levels of load shedding at three setting levels of load frequencies.

82. Simulation of over/under voltage relays.

83. Possible to plot Linear graph of absolute/relative swing curves for various machines.

84. Power swing curves of transmission lines and distance relay performance verification.

85. Wind Turbine behavior considering all the four IEEE/WECC generic wind turbines models (WT1 to WT4)

Over current & Distance Co-ordination Studies

86. Software shall support Standard Power System components and Relay symbols.

87. Software should have Inbuilt library of all widely used relays / fuses used in Indian scenario.

88. Software shall Co-ordinate the over current, earth fault relays, distance relays

89. Fault calculation will be inbuilt in the relay co-ordination program

90. Primary and backup relay pairs will be automatically generated.

91. There shall be a provision for manual selection of primary and backup relays.

92. Shall Consider thermal curve of all equipments

93. Simulation of relay responses for Existing settings of the relays

94. Relay co-ordination for radial and interconnected power system networks for over current relays.

95. Motor hot and cold curves.

96. Plotting Characteristic Curves on Log-Log grid.

97. Option to check existing relay settings as per the site.

98. Switching status for all Relay elements from the screen.

Highlighting of Relay Operational Sequence after the analysis.

99. Display of Sequence Operation of Relays with respect to tripping time.

100. Display of Fault on the SLD with standard notation after fault creation.

101. Disturbance Analysis with single click on mapping of disturbance files with corresponding relay.

102. Possible to model Transformer Differential Protection

103. Possible to model Restricted Earth Fault Protection

104. Possible to model Line Pilot Protection

105. Possible to model Bus Bar Differential Protection

106. Possible to model Line/Cable Differential Protection

107. Transformer over fluxing computations

108. Specific Features of Over Current Relay Coordination:

1. Phase Relay Coordination

2. Earth Relay Coordination (Co-ordination between Normal Non - Directional Earth Fault and Common Earth Fault should be provided.)

3. Standby Earth Fault

4. Partial Bus-bar Protection Simulation

5. Fuse Coordination

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6. Instantaneous Setting for Relays

7. Directional and Non-directional Feature for Relays

8. Pre-loaded Standard Relay Curves

9. Normalized Curve and Fault Line Feature

10. View existing and newly computed relay settings simultaneously

11. Partial Analysis for selected relays

12. Quick Solve

109. Specific Features of Distance Relay Coordination:

1. Automatic computation of zone setting in terms of Primary and Secondary for the standard make Relays. It will be the approved database (along with facility to update) for all types of conductors (for example from Dog to Quad Moose, Cables etc.)datai.e.R1/X1/Z1R0/X0/Z0,Zero Sequence Impedance angle etc. for computing the Line impedances. For Zone 2 and Zone 3, Zone 4 setting it has the facility to check whether the setting is not covering the next voltage level (considering the Transformer impedances from the Percentage impedances data).

2. Recommended Arc Resistance, Tower footing Resistance for different voltage level

3. Standard Relay Characteristics (example: mho, circular, quadrilateral, user defined etc.).


5. Impedance seen by the relay for faults

6. Quick Solve

Unit Protection/ Equipment Protection

110. Specific Features of Transformer Differential Protection:

1. Choice of relay library based on the manufacturer.

2. User defined bias slope setting

3. Provision to enter CT details for 2 winding and 3 winding Transformers &Single Phase Transformer for Railway Application.

4. Provision to enter existing relay settings.

5. Program Computed Transformer differential settings.

6. Program Computed Operating Time

111. Specific Features of Restricted Earth Fault Relay:


2. User choice of Current or voltage setting

3. Provision to enter current setting range details like minimum, Maximum and step Sensitive or

Normal selection will be from the REF data.

4. User choice of voltage setting details in % or volts.

5. Choice of continuous, uniform or discrete voltage setting variation.

6. Provision to add and delete voltage setting records.

7. User defined bias slope setting for Low Impedance RE/F application

8. Provision to enter CT details for 2 winding and 3 winding Transformers along with Neutral CT details.


10. Program Computed Restricted Earth Fault settings.


112. Specific Features Line Pilot Relay

1. User defined Line Pilot relay characteristics

2. Choice of pilot wire voltage (either 5 or 15 kV)

3. Choice of Loop Resistance between measured and computed data

4. Provision to input isolation transformer data

5. Provision to input CT data

6. Padding resistance as a computed output.

113. Specific Features Bus Bar Differential:

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1. Provision to enter relay details like max, min and step values of current in %.

2. Provision to enter relay details like max, min and step values of alarm in %.

3. Provision to enter relay details like max, min and step values of time in seconds.

4. Variable resistor Values: Enter Minimum, Maximum and step values

5. Provision to input Pick up Characteristics data for minimum, maximum and step details for over current setting in %, Stabilizing factor (selective), stabilizing factor (check zone) and Time in ms.

6. Provision to view computed and existing stabilizing resistance simultaneously

Specific Features Line/Cable Differential:

1. User defined values for minimum, maximum and step values in % for differential set, switch on, high set and 2nd harmonic restraint.

2. Provision to view computed and existing settings simultaneously.

114. Specific Features of Generator Overall, Generator Transformer and Unit Differential Protection

o Choice of relay library based on the manufacturer.

o User defined bias slope setting

o Provision to enter CT details for 2 and 3 and Multiple winding (for Overall differential)

Transformers

o Provision to enter existing relay settings.

o Program Computed Transformer differential settings.

o Program Computed Operating Time.

115. Specific Features of Generator Inter-turn Differential Protection.

i. Choice of relay library based on the manufacturer.

ii. User choice of Current or voltage setting

iii. Provision to enter current setting range details

iv. User choice of voltage setting details in % or volts.

v. Provision to enter CT details

vi. Provision to enter existing relay settings.

vii. Program Computed Generator Inter-turn Differential Protection settings.

viii. Program Computed Operating Time

116. Specific Features of Generator Stator Earth Fault Protection (Both 95% and 100% protection).

Choice of relay library based on the manufacturer.

User choice of Selection of 100% Generator Stator Earth Fault Protection ( 20Hz or Third Harmonic Principle)

Provision to enter Voltage setting range details

User choice of voltage setting details in % or volts.

Provision to enter CT details ( for 20Hz Principle)

Provision to enter existing relay settings.

Program Computed 95% and 100% Stator Earth Fault Protection settings.

Program Computed Operating Time.

117. Specific Features of Generator Rotor Earth Fault Protection


2. User choice of Selection of Rotor Earth Fault Protection

3. Provision to enter Voltage & Ohms setting range details



6. Program Computed Rotor Fault Protection settings.

7. Program Computed Operating Time.

118. Specific Features of Generator Loss of Excitation Protection(Field Failure) ( with and without Under voltage)

1. Automatic computation of Different Stages of Loss of Excitation

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2. Standard Relay Characteristics


4. Impedance seen by the relay.


6. Program Computed Rotor Fault Protection settings.


119. Specific Features of Forward Power and Reverse Power Protection

Automatic computation of Different Stages of Power Protection.

View existing and newly computed relay settings simultaneously

Provision to enter existing relay settings.

Program Computed Power Relay settings.

Program Computed Operating Time

120. Specific Features of Back-Up Impedance protection

Automatic computation of zone setting

Standard Relay Characteristics (example: mho, circular etc.

View existing and newly computed relay settings simultaneously

Impedance seen by the relay for faults

Quick Solve

121. Specific Features of Generator Inadvertent energisation


2. User choice of Selection of Generator Inadvertent energisation.

3. Provision to enter Voltage & current setting range details



6. Program Computed Generator Inadvertent energisation settings.


122. Specific Features of Generator Negative Sequence Protection


2. User choice of Selection of Generator Negative Sequence.

3. Provision to enter Voltage & current setting range details


5. Program Computed Generator Negative sequence settings.


123. Specific Features of Generator Thermal Overload Protection


2. User choice of voltage setting details in % or volts and necessary curves.

3. Choice of continuous, uniform or discrete voltage setting variation.


5. Program Computed Generator Thermal Overload Relay settings.


COMTRADE Viewer

124. Viewing of Analog and Digital plots of disturbance files stored in the relay

125. Computation of harmonics in the wave forms of analog channels

126. Harmonics up to the order of N/2 Hz (N-> Sampling Frequency)

127. Harmonics view in Tabular form /bar graphs

128. Saving of the analyzed file in Image format

129. Summary of the report includes

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1. File Information

2. Summary of Analog Channels

3. Digital channel data

4. Digital channel sequence events

5. Images of analog, digital and phasor section

6. Report types: Multiple

130. Merging of two existing COMTRADE files received from disturbance recorder can be edited or modified by removing unwanted channels and create a new COMTRADE file for further processing.

131. Comparison of 2 or more channels on the same screen

132. Computational View

133. Export to Excel, jpeg

134. Customized Printing: Printing of only required area on the viewer

Network Reduction Module

135. Used defined number of cases is possible

136. Static and dynamic equivalents (equivalent inertia constant) for the power system

137. Initial system condition will be taken from load flow

138. It is possible to select the busses to be retained, individually or zone/area wise.

139. Output of network reduction will give output for both Ybus and Zbus matrices for the reduced system.

140. Network reduction module will give impedance values of additional series and shunt connections arising out of network reduction.

141. Output of network reduction includes equivalent generator's inertia, power, voltage and impedance.

142. The reduced network database and diagram will be created automatically.

Electro-Magnetic Transient Analysis

143. Programiscapableofmodelingoftransmissionline(bothshortandlong),seriesreactor, seriescapacitor,synchronousmachines,inductionmotors,transformerwithmagnetizing component,shuntreactor(includingsaturation),shuntcapacitor,instantaneousvoltageand currentsources,RMSvoltageandcurrentsources,lightningarrestors,Instrument Transformers such as VT, CT&CVT.

It is possible to obtain the statistical analysis of breaker closing and opening.

Facility to create both symmetrical and asymmetrical faults with varying fault impedance.

It is possible to model the time varying resistor.

Impulse voltage/current can be injected at a bus as disturbance.

It has facility to incorporate user defined filters.

The module will generate the following results

Instantaneous voltage/current waveforms for three phases.

COMTRADE file generation.

Average power & energy output waveforms.

Electrical machines speed, angle, torque etc. waveforms

Protection Database Management system

144. Protection data management system is an asset management tool for maintaining information on relay attributes and settings. The software is capable of maintaining the entire data belonging to all relays. Once data fits in the software it will be capable of porting the data to any third party application for analysis and also various reports generated.

145. Web based software and Remotely accessible

146. Role based access control and user control

147. Customization of user roles, grants, actions

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148. User Access Monitor

149. Relay Template management

i. Create\Edit\Delete relay templates

ii. Viewing relay template

iii. Locking and Unlocking templates

iv. Copy & Edit templates from the existing template

v. Important Export templates

150. Relay Data management

a. Create\Edit\Delete relay data

b. Viewing relay data

c. Locking and Unlocking relay data

d. Copy & Edit relay data from the existing data

e. Import and Export relay data

151. Configuration management : It has option to configure user defined levels for generating relay indexing

152. Work flow Management

a) Relay template life cycle management

b) Relay data life cycle management.

153. History Logger : All user activities including user operations, data management, template management, configuration management and workflow should be logged to track the user activities over a period of time

154. Import and Export : It has an option to import template and data from any third party application in standard formats like xml and xls format

155. There is an option to integrate any third party application to share data between protection database management software and calculation engine\tool and vice versa.

156. Able to draw the relay characteristic curve from the setting data.

157. Provision to attach documents to relay template and relay data will be available.

158. There is option to accept setting data as per the audit and verify\compare the field setting with protection database setting and generate error report

159. Provision to store and retrieve relay tripping incidence report

160. There is facility to store and retrieve setting guidelines as per various committees.

161. Capturing the History of Protection audit of the sub-stations and reports are available each region-wise.

162. Reports:

Possible to generate reports as per user requirement

User can export generated report to the standard format like .xls, pdf, .doc.

Tripping Incidence Analysis Report

Sequence of Events Operation as viewed from SLDC Operation

Sequence of Breakers Tripped as viewed from Substation

Relays operated on each element-wise

Distance relay operation with different characteristics modeling

Security and data back up

163. Latest software and hardware firewalls to be installed for security of the database from hacking or other malicious manipulation.

Use should be made of 128 bit SSL protocol to encrypt the channel between a client and server to protect data during transit

164. All settings data, SLD, configuration data, hierarchy controls, etc. will be backed up by Network Data Management Protocol (NDMP) for faster disaster recovery. All hardware, software for such backup

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creation shall be deemed to be considered part of the project.

Reconciliation Tool

165. The package will contain an automatic reconciliation tool which would generate requests for reconciliation of substation wise data present on-site, which is obtained by audit and present in the database on a periodical basis. There is no direct communication with Relay is envisaged here. All constituents will be able to see a red colored buzzer on the dashboard informing them of the pending reconciliation. On clicking the buzzer, the constituent will be able to see the list of its substation where reconciliation is pending.

The administrator/SRPC Secretariat and SRLDC should be able to see the pending reconciliation status on constituent wise/substation wise report format. After reconciliation, the administrator shall be able to disengage the buzzer

Disaster recovery/Backup

166. The database has automatic backup/failsafe mechanisms to prevent loss of data with at least two separate storages.

E.5 Five Year Support Period

The following are the broad activities envisaged during the five year support period for this project.

Support period shall be for a period of 5 years beyond the date of Go Live.

Technical support for the protection setting computational tool and training programs on every quarterly

basis.

Updating and entering the protection and network database of the SR region for the next five years on

regular/daily basis which shall include changes in system configuration, addition of new substations,

generators, etc.

Bug fixing and free updation of the software release during the support period.

Performing the grid disturbance simulation for the events occurring in the system on daily basis.

Deployment of two qualified protection engineers for the support period. The engineers shall be available

for the technical support during official working hours.

Providing the expert technical advisory from the protection expert on the grid disturbance and simulation

studies in the events of faults

E.6 Exclusions:

Except the following exclusions all requirements for successful completion of the project shall be deemed to be the responsibility of the successful bidder.

The communication infrastructure/facility is not part of this scope.

The civil building infrastructure for the Hardware and software is not included. The control room Air-

conditioner and electrical power supply is not part of this scope.

This scope of work does not include online real time communication with any of the remote substation

equipment like relays, DR’s etc. It is to be noted that such a facility will call for providing necessary

communication infrastructure and special devices\tools to communicate with various makes\brand\versions

of equipment’s\protocols.

SECTION F: Bid Evaluation and Selection of Agency and Award of Work

The following is the Bid process/ evaluation methodology that will be adapted by purchaser for appointment of Agency.

1. Single Stage – Two packet/Envelope Procedure: Bidders should submit two sealed envelopes simultaneously, one containing the Technical Proposal (marked with Tender ID, Tender Name and “Technical Bid”) and the

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other the Price Proposal (marked with Tender ID, Tender Name and “Price Bid”), enclosed together in an outer single envelope (marked with Tender ID, Tender Reference, Tender Name and date of opening). Initially, only the Technical Proposals will be opened at the date and time advised in the Bidding Document. The Price Proposals remain sealed and are held in custody by the purchaser. The Technical Proposals are evaluated by the purchaser. No amendments or changes to the Technical Proposals are permitted. The objective of the exercise is to allow the purchaser to evaluate the Technical Proposals without reference to price for transparency.

2. Following the approval of the technical evaluation, and at an address, date and time advised by the purchaser, the Price Proposals will be opened for technically approved bidders. The Price Proposals are evaluated and, following approval of the price evaluation, the Contract is awarded to the Bidder who’s Bid has been determined to be successful based lowest quote.

3. Alternate bids will not be allowed. Alternate technical modules, methodologies, approach, project plan or timelines that deviate from the defined scope and the SRS document will be considered as alternate bid and will be considered as non responsive.

4. Preliminary Evaluation: The technical proposals will be reviewed for deviations, acceptance of terms and

conditions, adherence to scope of work, formats required, purchase of bid document etc. along with the demonstration during bid evaluation. In case of non compliance on any of the above, bids will be considered as technically non-responsive.

5. MANDATORY QUALIFYING REQUIREMENTS FOR TECHNICAL EVALUATION:

i. The Tenderer must have the complete knowledge of the protection system data base modeling and analysis for a big transmission utility. They should have completed at least ONE Job with the protection modeling, database building, simulations and protection setting calculation to a large transmission utility with more-than 150 sub-stations with the voltage level of 400kV to 132kV in the last seven years ending 31.03.2016. The documentary evidence for the same shall be submitted in the form of documents like PO/WO/Completion Letter/Reference letter/Payment received should be submitted along with the bid.

ii. The proposed Protection analysis software must be in use for at least 7 years ending 31.03.2016 in any Indian State Electricity Boards /transmission companies. Proof of the same like PO/WO/Completion Letter/ Reference letter/Payment received should be submitted along with the bid

iii. Tenderer must have software development center, technical and support team for support in India. Details such as address, phone no and name of relevant personnel along with their designation should be provided.

iv. Bidder must have at least Rs. XXXXX Crores (Rupees XXXXX in words) each year average turnover for the past three financial years that is from 01.04.2013 to 31.03.2016. Certificate from CA is to be submitted.

v. The bidder must have completed at least THREE works of not less than Rs. XXXXX Crores each OR at least TWO works of not less than Rs. XXXXX Crores each OR ONE work of not less than Rs. XXXXX Crores for power system analysis software development/supply for electrical utility in the last seven financial years that is from 01.04.2009 to31.03.2016. Proof of the same like PO/WO/Completion Letter/ Reference letter/Payment received should be submitted along with the bid (Except Hardware and before taxes and not including any AMC component)

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vi. The bidder must have completed at least THREE works of not less than Rs. XXXXX Crores each or at least TWO workS not less than Rs. XXXXX Crores OR at least ONE work of not less than Rs. XXXXX Crores for protection system modeling database building and maintenance along with supply of software in power sector in the last seven financial years that is from 01.04.2009 to 31.03.2016. Proof of the same like PO/WO/Completion Letter/ Reference letter/Payment received should be submitted along with the bid (Except hardware and before taxes and not containing any AMC component)

vii. The bidder must submit banker’s solvency certificate for at least Rs. XXXXX Crores.

viii. Tenderer must have the web based protection database software which can be customized to SRPC requirement and will be able to build/model the different manufactures relays.

ix. Key protection simulation functionality as at Annexure-A (Technical bid) shall be complied and confirmation documents shall be submitted along-with the bid. The same shall be demonstrated for the technical evaluation committee of SRPC.

x. The bidder must be able to assign minimum 20(Twenty) number of power system & protection engineer on his role full time with Electrical Engineering degree for the works involved in the project as detailed in Annexure-B.

xi. Tenderer should have an office set up for technical support in the Southern region.

xii. The company should practice ISO industry standard Quality process and systems for the software development and activities. The company should have a relevant ISO 9001 certificate for the software development and power system consultancy and the same should be submitted along with the bid.

xiii. No part of the work can be outsourced to other third parties. All works including collection of data, preparation of Database and integration of analysis tools shall be done by the bidder in house utilizing its own resources. Proprietary third party software available in the market/open source, if required may be purchased with the license in favor of SRPC.

xiv. Tenderer should not be in blacklist of any department of Government in India and Abroad. Submit undertaking in Annexure E

xv. Should have worked with at least one power utility company in India in providing IT consulting (power system analysis software tool development/supply, data collection and database building/maintenance work/consultancy), in the last three financial years.

xvi. Should have positive net worth in the last three audited financial years that is from 01.04.2013 to 31.03.2016.

6. Documents comprising the Technical bid: Technical bids and shall contain no prices or price schedules.

Technical bids containing such price information will be rejected. Attachments to the Technical bid:

Each Bidder shall submit with its First Stage bid the following attachments:

a. EMD b. Power of Attorney c. Bidder’s Eligibility and Qualifications as per Mandatory Qualifying Requirements d. The bidder should submit a statement informing the detailed methodology for executing

the complete assignment along with key points. Work completion schedule, deliverables and detailed technical specifications of hardware and software proposed to be supplied.

e. Tender document signed and sealed on all pages as an unequivocal acceptance of terms and conditions.

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f. Manpower deployment schedule with CV’s. g. Manufacturer’s Authorization Form h. Additional Information which bidder intends to submit along with the tender like quality

certifications etc. i. Technical bid form Annexure-A j. Receipt of tender fees k. All other enclosures required to be submitted as per Technical Specification at Annexures

7. Technical Bid Form: The Bidder shall complete the Technical Bid Format Annexure A in the manner and

details indicated therein and submit the same with its first stage bid. 8. Technically qualified bidder: The technical bids shall be opened by a Tender Evaluation Committee (TEC)

formed for this purpose. The Qualifying Criteria & Technical bid shall be analyzed first. TEC will scrutinize the offer to determine whether the offer is complete, whether required technical documentation have been furnished, whether the documents have been properly signed, whether the bidder has made successful demonstration and whether the offer is in order.The decision of the Evaluation Committee in the evaluation of the Qualification criteria and Price bids shall be final and binding.

9. Price bid: The Price bids may be opened on the same day o r at a later date to be intimated on the same day based on the number of bids received. The Price bid of only those bidders would be opened who have qualified the mandatory qualifying requirements. All figures in financial bids shall be in Indian currency only. The financial bid must be submitted in format at Annexure C only. Validity of the Price bids shall be 90 days from the date of opening of financial bid. Selection of Successful bidder: The L1 bidder among technically qualified bidders will be awarded the work after recommendation of TEC.

10. Notification of Award and Initiation of Contract: The Bidder, whose Bid has been accepted, will be notified of the award by SRPC prior to expiry of the Bid validity period by cable, e-mail, or facsimile confirmed by registered letter/speed post. This letter (hereinafter and in the Conditions of Contract called the "Letter of Intent"(LOI)) will state the sum that purchaser will pay the Agency in consideration of the execution, completion and maintenance of the Works by the Agency, as prescribed by the Contract (hereinafter and in the Contract called "the Contract Price").

11. The successful qualified Bidder(s) will confirm acceptance of LOI through ‘Letter of Acceptance’ within seven days from the date of issue of LOI along with the Performance Security Guarantee.

12. Award of work: Thereafter “Letter of Award” shall be issued after receipt of ‘Letter of Acceptance’ and submission of Performance Security.

13. Upon the furnishing of Performance Security Guarantee Deposit by the successful Bidder and receipt of “Letter of Acceptance” SRPC will promptly notify the other Bidder(s) that their Bids have been unsuccessful and refund the Bid Security/Earnest Money Deposit as promptly as possible.

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Section G: General Conditions of Contract

1. Contract Documents 1.1 All documents forming the Contract (and all parts thereof) are intended to be

correlative, complementary, and mutually explanatory.

2. Corrupt Practices

The bidder shall not have been blacklisted by any State/Central Government or PSU

Organization or bilateral/multilateral funding agencies for breach of ethical conduct

or fraudulent practices as on date of submission of the proposal. There should be no

investigations pending/proceedings contemplated against the bidder by any

government agency.

1.2 The Purchaser requires bidders, suppliers, and contractors to observe

the highest standard of ethics during the execution of such contracts.

(a) The following definitions apply:

“corrupt practice” means the offering, giving receiving, or soliciting, directly or

indirectly, of anything of value to influence the action of any party in the

procurement process or the execution of a contract;

“fraudulent practice” means a misrepresentation or omission of facts in order to

influence a procurement process or the execution of a contract;

“collusive practices” means a scheme or arrangement between two or more

bidders, with or without the knowledge of the SRPC,- designed to influence the

action of any party in a procurement process or the execution of a contract;

“coercive practices” means harming or threatening to harm, directly or indirectly,

persons, or their property to influence their participation in a procurement process,

or affect the execution of a contract;

(b) The Purchaser will reject a proposal for award if it determines that the bidder

recommended for award has, directly or through an agent, engaged in corrupt,

fraudulent, collusive, or coercive practices in competing for the Contract.

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3. Interpretation 1.3 In this Contract unless a contrary intention is evident:

(a) the clause headings are for convenient reference only and do not form

part of this Contract. The headings shall not limit, alter or affect the meaning of this

Contract;

(b) unless otherwise specified a reference to a clause number is a reference to all of

its sub-clauses;

(c) unless otherwise specified a reference to a clause, sub-clause or section is a

reference to a clause, sub-clause or section of this Contract including any

amendments or modifications to the same from time to time;

(d) a word in the singular includes the plural and a word in the plural includes the

singular;

(e) a word imparting a gender includes any other gender;

(f) a reference to a person includes a body corporate;

(g) a reference to legislation includes legislation repealing, replacing or amending

that legislation;

(h) where a word or phrase is given a particular meaning it includes the appropriate

grammatical forms of that word or phrase which have corresponding meanings;

(i) in the event of an inconsistency between the terms of this Contract and the

proposal, the terms of this contract hereof shall prevail.

1.4 Entire Agreement

The Contract constitutes the entire agreement between the Purchaser and the

Supplier and supersedes all communications, negotiations and agreements

(whether written or oral) of parties with respect there to made prior to the date of

Contract.

1.5 Amendment

No amendment or other variation of the Contract shall be valid unless it is in writing,

is dated, expressly refers to the Contract, and is signed by a duly authorized

representative of each party thereto.

1.6 Non-waiver

(a) Subject to GCC Clauses 32 and 34 below, no relaxation, forbearance, delay, or

indulgence by either party in enforcing any of the terms and conditions of the

Contract or the granting of time by either party to the other shall prejudice, affect,

or restrict the rights of that party under the Contract, neither shall any waiver by

either party of any breach of Contract operate as waiver of any subsequent or

continuing breach of Contract.

Any waiver of a party’s rights, powers, or remedies under the Contract must be in

writing, dated, and signed by an authorized representative of the party granting

such waiver, and must specify the right and the extent to which it is being waived.

1.7 Severability

If any provision or condition of the Contract is prohibited or rendered invalid or

unenforceable, such prohibition, invalidity or unenforceability shall not affect the

validity or enforceability of any other provisions and conditions of the Contract.

4. Language 1.8 The Contract as well as all correspondence and documents relating to the

Contract exchanged by the Agency and the Purchaser, shall be written in English.

Supporting documents and printed literature that are part of the Contract may be in

another language provided they are accompanied by an accurate translation of the

relevant passages in English, in which case, for purposes of interpretation of the

Contract, this translation shall govern.

1.9 The Agency shall bear all costs of translation to English and all risks of the

accuracy of such translation.

5.Joint

Venture/Consortium/Association

1.10 No Joint venture/Consortium/Association is allowed to participate in this

tender. All works envisaged in the scope of work are to be undertaken by the bidder

with manpower on its own rolls.

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6. Eligibility 1.11 Eligibility criteria shall be as per the Technical bid evaluation criteria

7.Location 1.12 The Services shall be performed at the area under the jurisdiction of SRPC

, or at such location required by SRPC.

8.Effectiveness of Contract 1.13 This Contract shall come into force and effect on the date of award

(the“Effective Date") of the Purchaser’s notice to the Agency confirming that the

following conditions have been met:

a) This Contract has been approved by Purchaser

b) Requisite Performance Bank Guarantee has been submitted.

9. Warranty/ Licenses and Annual

Maintenance Contract (AMC)

1.14 Server, storage hardware and Laptops supplied in the contract shall be covered

under warranty for at least five year onsite manufacturer's warranty.

Warranty period for the all other hardware shall be on site for twelve months or as

per manufacturer standard warranty whichever is higher.

All warranties and licenses for hardware and software shall be in favor of purchaser.

10.Authorized Representatives 1.15 Any action required or permitted to be taken, and any document

required or permitted to be executed under this Contract, may be taken or

executed:

a) on behalf of the Purchaser by competent authority or his designated

representative;

b) on behalf of the Agency by PoA or his designated representative.

11. Relation between the Parties 1.16 Nothing contained herein shall be construed as establishing a relation of

master and servant or of agent and principal as between the Purchaser and the

Agency. The Agency, subject to this Contract, has complete charge of Personnel

performing the Services and shall be fully responsible for the Services performed by

them or on their behalf hereunder.

12. Notices 1.17 Any Notice given by one party to the other pursuant to the Contract shall be in

writing. The term “in writing” means communicated in written form with proof of

receipt.

1.18 Any such notice, request or consent shall be deemed to have been given or

made when delivered in person to an authorized representative of the Party to

whom the communication is addressed, or when sent by registered post, telex,

telegram, email or facsimile to such Party at the following address:

1.19 For the Owner: Member Secretary, SRPC

Email: [email protected] and [email protected] Telephone: 22287205,

26682396

1.20 For the Agency: (pl.fill up)__________________

Attention: ___________________ Telegram: ___________________

Facsimile: ___________________

1.21 Notice will be deemed to be effective as follows:

(a) in the case of personal delivery or registered mail, on delivery;

(b) in the case of email twenty four(24) hours following confirmed transmission.

(c) in the case of facsimiles, twenty four(24) hours following confirmed transmission

1.22 A Party may change its address for notice hereunder by giving the

other Party notice of such change pursuant to this Clause.

13. Governing Law 1.23 The Contract shall be governed by and interpreted in accordance with the laws

of the India. The Courts in Bangalore shall have exclusive jurisdiction with respect of

the tendering process, award of Contract and execution of the Contract.

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14.Settlement of Disputes 1.24 The Purchaser and the Supplier shall make every effort to resolve amicably by

direct informal negotiation any disagreement or dispute arising between them

under or in connection with the Contract.

1.25 If the parties fail to resolve such a dispute or difference by mutual consultation

within twenty-eight (28) days from the commencement of such consultation, either

party may require that the dispute be referred for resolution to the formal

mechanisms specified below:

If the parties fail to resolve such a dispute or difference by mutual consultation

within twenty-eight (28) days from the commencement of such dispute and

difference, either party may require that the dispute be referred for resolution to

the formal mechanisms, described below (The date of commencement of the

dispute shall be taken from the date when this clause reference is quoted by either

party in a formal communication clearly mentioning existence of dispute or as

mutually agreed) :

a. The mechanism for resolution of disputes for bidders shall be in accordance with

the Indian Arbitration and Conciliation Act of 1996 as amended from time to time.

The Arbitral Tribunal shall consist of 3 (Three) Arbitrators. Each Party shall nominate

an Arbitrator and the two nominated Arbitrators shall mutually agree and nominate

a third Presiding Arbitrator. b. The place for arbitration shall be Bangalore

15. Scope of Work 1.26 The services to be rendered by Agency shall be as per scope of work (Given in

the Section E-Scope of Work). At the time of awarding the contract, the Purchaser

shall specify any change in the Scope of Work. Such changes may be due to increase

or decrease in the scope of work at the time of award.

1.27 Unless otherwise stipulated in the Contract, the Scope of Work shall include all

such items not specifically mentioned in the Contract but that can be reasonably

inferred from the Contract as being required for attaining Delivery and Completion

of Related Services as if such items were expressly mentioned in the Contract.

16.Commencement of Services 1.28 The Agency shall begin carrying out the Services immediately viz. from the date

of issue of Letter of Award (the "Starting Date"), or on such date as the Parties may

agree in writing.

17. Delivery 1.29 The Delivery of services and Completion of the Related Services shall be in

accordance with the milestones specified in the Section E, Scope of Work and

acceptance of the services rendered by the Purchaser.

1.30 The Agency, in relation to its deliverables, shall provide any supporting data or

information required by the Purchaser.

18.Agency Responsibilities 1.31 The Agency shall provide the services mentioned in the Scope of Work and the

Delivery and Completion Schedule, as per Section–E-Scope of Work.

19.Purchaser’s Responsibilities 1.32 For successful completion of the assignment, as and when required by the

Agency, the Purchaser shall provide data and support based on availability of the

same and without prejudice. In the event that the purchaser is unable to provide the

required data or support for a requirement which the Agency cannot be reasonably

expected to procure on its own or from alternate sources, the Agency’s failure to

deliver shall not be held against it.

1.33 The Agency shall bear all costs involved in the performance of

its responsibilities, in accordance with GCC Clause 20.

1.34 The Competent authority of Purchaser shall act as the nodal point for

implementation of the contract and for issuing necessary instructions, approvals,

commissioning, acceptance certificates, payments etc. to the Agency.

1.35 The Competent authority of Purchaser shall approve all such documents within

30 working days.

1.36 Purchaser may provide on Supplier’s request, particulars/information / or

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documentation that may be required by the Supplier for proper planning and

execution of Scope of Work under this contract.

1.37 Purchaser shall provide to the Supplier sitting space and infrastructure and

utilities, in the Purchaser’s offices at such location as may be mutually decided by

the Parties.

20. Contract Price 1.38 The Contract Price shall be as specified in the Agreement subject to any

additions and adjustments thereto, or deductions there from, as maybe made

pursuant to the Contract.

1.39 Prices charged by the agency for the service provided under the Contract shall

not vary from the prices quoted by the Agency in its Bid (bid value).

21. Terms of Payment 1.40 The Contract Price shall be paid in the manner specified in the Payment

Schedule GCC 51. No invoice for extra work/change order on account of change

order will be submitted by the Supplier unless the said extra work /change order has

been authorized/approved by the Purchaser in writing. , as appropriate, Services

provided, accompanied by the documents submitted pursuant to GCC Clause 17.

The Agency shall submit the bills in triplicate to the concerned purchaser.

1.42 Payments shall be made promptly by the Purchaser, not later than sixty (60)

days after submission of an invoice along with supporting documents or request for

payment by the Supplier, and the Purchaser has accepted it. But if the progress is

not satisfactory and according to agreed work program/schedule the payment may

be withheld.

1.43 The final payment under this Clause shall be made only after satisfactory

completion of the activities mentioned in the Scope of Work.

1.44 If any excess payment has been made by the Purchaser due to difference in

quoted price in proposal and Supplier’s invoice, the purchaser may without

prejudice to its rights recover such amounts by other means after notifying the

Supplier or deduct such excess payment from any payment subsequently falling due

to the Agency.

22. Taxes and Duties 1.45 The Agency and the personnel shall pay the taxes, duties, fees, levies and other

impositions levied under the existing, amended or enacted laws during life of this

contract.

The purchaser shall reimburse all applicable taxes such as VAT and Service Tax

directly related to the execution of the works to the agency and the purchaser shall

perform such duties in regard to the deduction of such tax as may be lawfully

imposed.

Payment of taxes/duties shall not be made separately in any case.

For goods/services supplied from outside the Purchaser’s country, the Supplier shall

be entirely responsible for all taxes, duties, stamp duties, license fees, and other

such levies imposed outside the Purchaser’s country.

23. Performance Security 1.48 The Supplier shall, within twenty eight (28) days of the issue of Letter of Intent,

provide a Performance Security for the due performance of the Contract in the

amounts and currencies specified below:

The successful bidder will have to furnish a Performance Security Guarantee

Deposit @ 5% of the bid value/contract price in form of an irrevocable bank

guarantee as per format at Annexure G from a scheduled commercial bank within

28 days after the issue of letter of intent (LoI).

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The performance guarantee shall remain valid for a period of 60 days beyond the

support period of five years from the date of project ‘go live’ and shall be

renewed for a further period, if required so. Performance Security Guarantee in

form of bank guarantee will be discharged and returned to the successful bidder

after satisfactory performance of all the terms and conditions of contract.

This guarantee will be for faithful performance of the contract in accordance with

the terms and conditions and technical specification specified in the contract bid

documents.

1.49 The Purchaser shall at its sole discretion invoke the Performance Security and

appropriate the amount secured there-under, in the event that the Supplier

commits any delay or default in Services rendered or commits any breach of the

terms and conditions of the Contract.

1.50 The Performance Security shall be denominated in the currencies of the

Contract, and shall be in one of the forms stipulated by the Purchaser in Annexure

G.

1.51 The Performance Security shall be discharged by the Purchaser and

returned to the Agency not later than sixty (60) days following the date of

completion of the Supplier’s performance obligations under the Contract, unless

specified.

24. Intellectual Property 1.52 Purchaser shall own and have a right in perpetuity to use all newly created

Intellectual Property Rights which have been developed solely during execution of

this Contract, including all records, reports, designs, application configurations, data

and written material, specifications, reports, drawings and other documents which

have been newly created and developed by the Supplier solely during the

performance of Related Services and for the purposes of inter-alia use or sub-license

of such Services under this Contract. The Supplier undertakes to disclose all such

Intellectual Property Rights arising in performance of the Related Services to the

Purchaser and execute all such agreements/documents and file all relevant

applications, effect transfers and obtain all permits and approvals that may be

necessary in this regard to effectively transfer and conserve the Intellectual Property

Rights of the Purchaser. To the extent that Intellectual Property Rights are unable,

by law, to so vest, the Supplier assigns those Intellectual Property Rights to

Purchaser on creation.

1.53 The Supplier shall be obliged to ensure that all approvals, registrations,

licenses, permits and rights etc. which are inter-alia necessary for use of the goods

supplied / installed by the Supplier (if any),as part of the service obligations under

the present contract, shall be acquired in the name of the Purchaser, and the same

may be assigned by the Purchaser to the Supplier solely for the purpose of

execution of any of its obligations under the terms of this Contract. However,

subsequent to the term of this Contract, such approvals, registrations, licenses,

permits and rights etc. shall endure to the exclusive benefit of the Purchaser

1.54 The Supplier shall ensure that while it uses any software, hardware, processes,

document or material in the course of performing the Services, it does not infringe

the Intellectual Property Rights of any person and the Supplier shall keep the

Purchaser indemnified against all costs, expenses and liabilities howsoever, arising

out any illegal or unauthorized use(piracy) or in connection with any claim or

proceedings relating to any breach or violation of any permission/license terms or

infringement of any Intellectual Property Rights by the Supplier or its personnel

during the course of performance of the Related Services. In case of any

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infringement by the Supplier, the Supplier shall have sole control of the defense and

all related settlement negotiations

1.55 Subject to sub-clauses 1.52 to 1.54, the Supplier shall retain exclusive

ownership of all methods, concepts, algorithms, trade secrets, software

documentation, other intellectual property or other information belonging to the

Supplier that existed before the effective date of the contract.

25. Confidential Information 1.56 The Agency/Consortium and the personnel of any of them shall not either

during the term or within two (2) years after the expiration of this contract, disclose

any proprietary or confidential information relating to the Project, the Services, this

Contract or the Owner’s business or operations without the prior written consent of

the owner.

1.57 The Purchaser shall not use such documents, data, and other information

received from the Supplier for any purposes unrelated to the Contract. Similarly, the

Supplier shall not use such documents, data, and other information received from

the Purchaser for any purpose other than the design, procurement, or other work

and Services required for the performance of the Contract.

1.58 The obligation of a party under this clause, however, shall not apply to

information that:

(a) the Purchaser or Agency need to share with the institutions participating in the

financing of the Contract;

(b) now or hereafter enters the public domain through no fault of that party;

(c) can be proven to have been possessed by that party at the time of disclosure and

which was not previously obtained, directly or indirectly from the other party; or

(d) Otherwise lawfully becomes available to that party from a third party that has no

obligation of confidentiality.

1.59 The above provisions of GCC Clause 25 shall not in any way modify any

undertaking of confidentiality given by either of the parties hereto prior to the date

of the Contract in respect of the Supply or any part thereof.

1.60 The provisions of GCC Clause 25 shall survive completion or termination, for

whatever reason, of the Contract.

26. Subcontracting 1.61 The Agency shall not be permitted to sub-contract any part of its obligations

under the Contract with the utilities.

Neither the contract nor any rights granted under the contract may be sold,

leased/sublet, assigned, or otherwise transferred, in whole or in part, by the

agency., and any such attempted sale, lease, assignment or otherwise transfer shall

be void and of no effect without the advance written consent of the purchaser .

27. Service Quality 1.62 The Purchaser may reject any Service rendered or any part thereof

that fail to conform to the specifications. The Supplier shall take measures

necessary to meet the specifications at no cost to the Purchaser.

28.Liquidated Damages and Penalty 1.63 Except as provided under GCC Clause 32, if the Supplier fails to perform any or

all of the Services within the period specified in the Contract, the Purchaser may

without prejudice to all its other remedies under the Contract, deduct from the

Contract Price, as liquidated damages,

a)sum equivalent to 0.5% of the value of the Services, supplied beyond stipulated

delivery schedule for each week or part thereof of delay until actual performance,

subject to a maximum of 10% of value of such services.

b) To obtain services from elsewhere, after due notice to the successful bidder on

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the account and at the risk of the defaulting service provider.

c) To cancel the work order or a portion thereof and if so desired to get the services

at the risk and cost of the defaulting supplier and also,

d) To extend the period of delivery with or without penalty as may be considered fit

and proper, the penalty, if imposed shall not be more than the agreed liquidated

damages referred to in clause (a) above.

e) To forfeit the security deposit fully or partly.

f) Whenever, under this contract, a sum of money is recoverable from and payable

by the Service Provider, purchaser shall be entitled to recover such sum by

appropriation in part or in whole by deducting any sum or which at any time

thereafter may become due to the successful bidder in this or any contract should

this sum be not sufficient to cover the full amount recoverable, the successful

bidder shall pay purchaser on demand the remaining amount. The supplier shall not

be entitled to any gain on any such purchase.

The bidder shall not be in any manner liable for any delay arising out of purchaser’s

inability to make the site ready within the stipulated period.

29.Liability/ Indemnity 1.64 The Supplier hereby agrees to indemnify the Purchaser, for all conditions and

situations mentioned in this clause, in a form and manner acceptable to the

Purchaser. The supplier agrees to indemnify the Purchaser and its officers, servants,

agents (“ Purchaser Indemnified Persons”) from and against any costs, loss,

damages, expense, claims including those from third parties or liabilities of any kind

howsoever suffered, arising or incurred inter alia during and after the Contract

period out of:

(a) any negligence or wrongful act or omission by the Supplier or its agents or

employees or any third party associated with Supplier in connection with or

incidental to this Contract; or

(b) any infringement of patent, trademark/copyright or industrial design rights

arising from the use of the supplied Goods and Services or any part thereof.

1.65 The Supplier shall also indemnify the Purchaser against any privilege, claim or

assertion made by third party with respect to right or interest in, ownership,

mortgage or disposal of any asset, property, movable or immovable as mentioned in

any Intellectual Property Rights, licenses and permits

1.66 Without limiting the generality of the provisions of this article 1.67and 1.68,

the Supplier shall fully indemnify, hold harmless and defend the Purchaser

Indemnified Persons from and against any and all suits, proceedings, actions, claims,

demands, liabilities and damages which the Purchaser Indemnified Persons may

hereafter suffer, or pay by reason of any demands, claims, suits or proceedings

arising out of claims of infringement of any domestic or foreign patent rights,

copyrights or other intellectual property, proprietary or confidentiality rights with

respect to any Goods, Services, information, design or process supplied or used by

the Supplier in performing the Supplier’s obligations or in any way

incorporated in or related to the Project. If in any such suit, action, claim or

proceedings, a temporary restraint order or preliminary injunction is granted, the

Supplier shall make every reasonable effort, by giving a satisfactory bond or

otherwise, to secure the suspension of the injunction or restraint order. If, in any

such suit, action, claim or proceedings, the Goods or Services, or any part thereof or

comprised therein, is held to constitute an infringement and its use is permanently

enjoined, the Supplier shall promptly make every reasonable effort to secure for the

Purchaser a license, at no cost to the Purchaser, authorizing continued use of the

infringing work. If the Supplier is unable to secure such license within a reasonable

time, the Supplier shall, at its own expense, and without impairing the specifications

and standards, either replace the affected work, or part, or process thereof with

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non-infringing work or part or process, or modify the same so that it becomes non-

infringing. Survival on Termination The provisions of this Clause 29 shall survive

Termination.

1.67 Defense of Claims:

If any proceedings are brought or any claim is made against the Purchaser arising

out of the matters referred to in GCC Sub-Clause 1.67, 1.68, or 1.69the Purchaser

shall promptly give the Supplier a notice thereof, and the Supplier may at its own

expense and in the Purchaser’s name conduct such proceedings or claim and any

negotiations for the settlement of any such proceedings or claim.

1.68 If the Supplier fails to notify the Purchaser within twenty-eight (28)days after

receipt of such notice that it intends to conduct any such proceedings or claim, then

the Purchaser shall be free to conduct the same on its own behalf.

1.69 The Purchaser shall, at the Supplier’s request, afford all available assistance to

the Supplier in conducting such proceedings or claim, and shall be reimbursed by

the Supplier for all reasonable expenses incurred in so doing.

30. Limitation of Liability 1.70 Except in cases of gross negligence or willful misconduct :

(a) neither party shall be liable to the other party for any indirect or consequential

loss or damage, loss of use, loss of production, or loss of profits or interest costs,

provided that this exclusion shall not apply to any obligation of the Supplier to pay

liquidated damages to the Purchaser; and(b) the aggregate liability of the Supplier

to the Purchaser, whether under the Contract, in tort, or otherwise, shall not exceed

the amount specified in the Contract Price. Provided that this limitation shall not

apply to the cost of repairing or replacing defective equipment, or to any obligation

of the Supplier to indemnify the Purchaser with respect to patent infringement.

31. Change in Laws and Regulations 1.71 Unless otherwise specified in the Contract, if after the date of the Invitation for

Bids, any law, regulation, ordinance, order or bylaw having the force of law is

enacted, promulgated, abrogated, or changed in the place of the Purchaser’s

country where the Site / area of work is located(which shall be deemed to include

any change in interpretation or application by the competent authorities) that

subsequently affects the Delivery Date, then such Delivery Date shall be

correspondingly increased or decreased, to the extent that the Supplier has thereby

been affected in the performance of any of its obligations under the Contract.

32. Force Majeure If the execution of the contract is delayed beyond the period stipulated in the

contract as a result of outbreak of hostilities, declaration of an embargo or blockage

or fire, flood, acts of nature or any other contingency beyond the supplier’s control

due to act of God, then purchaser may allow such additional time by extending the

delivery period as it considers to be justified by the circumstances of the case and

the decision of the purchaser in this regard shall be final.

If and when additional time is granted by the purchaser, the contract shall be read

and understood as if it had contained from its inception the delivery date as

extended subject to the following conditions. Power failure will not be considered as

a force majeure conditions.

1.75 A Party affected by an event of Force Majeure shall take all reasonable

measures to remove such Party's inability to fulfill its obligations hereunder with a

minimum of delay.

1.76 A Party affected by an event of Force Majeure shall notify the other Party of

such event as soon as possible, and in any event not later than fourteen (14) days

following the occurrence of such event, providing evidence of the nature and cause

of such event, and shall similarly give notice of the restoration of normal conditions

as soon as possible.

1.77 The Parties shall take all reasonable measures to minimize the consequences of

any event of Force Majeure.

1.78 The decision of the Purchaser with regard to the occurrence, continuation,

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period or extent of Force Majeure shall be final and binding on the Supplier.

1.79 Any period within which a Party shall, pursuant to this Contract, complete any

action or task, shall be extended for a period equal to the time during which such

Party was unable to perform such action as a result of Force Majeure.

1.80 Not later than thirty (30) days after the agency, as the result of an event of

Force Majeure, have become unable to perform a material portion of the Services,

the Parties shall consult with each other with a view to agreeing on appropriate

measures to be taken in the circumstances.

33. Change Orders and Contract

Amendments

1.81 The Purchaser may at any time order the Agency through Notice in accordance

GCC Clause 12, to make changes within the terms and conditions of this Contract,

including any modification of the scope of the Services.

1.82 If any such Change Order causes an increase or decrease in the cost of, or the

time required for, the Supplier’s performance of any provisions under the Contract,

an equitable adjustment shall be made in the Contract Price or in the Delivery and

Completion Schedule, or both, and the Contract shall accordingly be amended. Any

claims by the Agency for adjustment under this Clause must be asserted within

twenty-eight (28)days from the date of the Supplier’s receipt of the Purchaser’s

Change Order.

1.83 No variation or modification of the terms of the contract shall be made except

by written amendment signed by the parties.

34. Extensions of Time 1.84 If at any time during performance of the Contract, the Supplier should

encounter conditions impeding timely completion of Services pursuant to GCC

Section-E, the Supplier shall promptly notify the Purchaser in writing of the delay, its

likely duration, and its cause. As soon as practicable after receipt of the Supplier’s

notice, the Purchaser shall evaluate the situation and may at its discretion extend

the Supplier’s time for performance, in which case the extension shall be ratified by

the parties by amendment of the Contract.

1.85 Except in case of Force Majeure, as provided under GCC Clause 32 or where the

delay in delivery of the Goods or completion of Services is caused due to any delay

or default of the Purchaser, any extension granted under clause 34 shall not absolve

the Supplier from its liability to the pay of liquidated damages pursuant to GCC

Clause 28.

35. Suspension 1.86 The Purchaser may, by written notice of suspension to the Agency, suspend all

payments to the Agency hereunder if the Agency fail to perform any of their

obligations under this Contract, including the carrying out of the Services as per

schedule, provided that such notice of suspension (i) shall specify the nature of the

failure, and (ii) shall request the Agency to remedy such failure within a period not

exceeding Seven (7) days after receipt by the Agency of such notice of suspension

and shall invoke contract performance guarantee.

36. Termination 1.87 Termination of Contract for Failure to Become Effective

(a) If the purchaser fails to issue letter of intent (LoI) within 90 days of the date of

opening of bids for whatever reasons, either Party may, by not less than two weeks

(2) weeks' written notice to the other Party, declare this Contract to be null and

void, and in the event of such a declaration by either Party, neither Party shall have

any claim against the other Party with respect hereto.

1.88 Termination for Default

(a) The Purchaser may, without prejudice to any other remedy for breach of

Contract, by Notice of default sent to the Agency terminate the Contract in whole or

in part:

(i) if the Agency fails to provide acceptable quality of Services within the period

specified in the Contract, or within any extension thereof granted by the Purchaser

pursuant to GCC Clause34; or

(ii) if the Agency, in the judgment of the Purchaser has engaged in corrupt,

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fraudulent, collusive, or coercive practices, as defined in GCC Clause 2, in competing

for or in executing the Contract; or

Any representation made by the bidder in the proposal is found to be false or

misleading if the Agency commits any breach of the Contract and fails to remedy or

rectify the same within the period of two weeks (or such longer period as the

Purchaser in its absolute discretion decide) provided in a notice in this behalf from

the Purchaser.

If the Agency fail to comply with any final decision reached as a result of arbitration

proceedings.

If, as the result of Force Majeure, the Agency is unable to perform a material portion

of the Services for a period of not less than sixty (60) days.

If the Agency has been blacklisted by the any government agency due to misconduct

etc.

In the event the Purchaser terminates the Contract in whole or in part, pursuant to

GCC Clause36, the Purchaser may procure, upon such terms and in such manner as

it deems appropriate, Goods or Services similar to those undelivered or not

performed, and the Agency shall be liable to the Purchaser for any additional costs

for such similar Goods or Services. However, the Supplier shall continue

performance of the Contract to the extent not terminated.

1.89 Termination for Insolvency

The Purchaser may at any time terminate the Contract by giving Notice to the

Agency if the Supplier becomes bankrupt or otherwise insolvent. In such event,

termination will be without compensation to the Agency, provided that such

termination will not prejudice or affect any right of action or remedy that has

accrued or will accrue thereafter to the Purchaser

1.90 Termination for Convenience

The Purchaser, by Notice sent to the Agency, may terminate the Contract, in whole

or in part, at any time for its convenience. The Notice of termination shall specify

that termination is for the Purchaser’s convenience, the extent to which

performance of the Agency under the Contract is terminated, and the date upon

which such termination becomes effective.

1.91 Consequences of Termination

Upon Termination of the Contract, the Agency shall:

Prepare and present a detailed exit plan within five calendar days of termination

notice receipt to the competent authority of Purchaser (“Exit Plan”).

The competent authority and along with designated team will review the Exit plan. If

approved, Supplier shall start working on the same immediately. If the plan is

rejected, Agency shall prepare alternate plan within two calendar days. If the

second plan is also rejected, competent authority will provide a plan for Supplier

and it should be adhered by in totality.

The Exit Plan should cover at least the following :-

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Execute all documents that may be necessary to effectively transfer the ownership

and title, including OEM warranties in respect of all leased equipment;

(ii) Handover all developed codes, related documentation and other Configurable

Items, if any in his possession;

(iii) Handover the list of all IT Assets, passwords at all locations to the Purchaser.

37. Cessation of Rights & Obligations 1.92 Upon termination of this Contract pursuant to Clause 36 hereof, or upon

expiration of this Contract pursuant to Clause 49 hereof, all rights and obligations of

the Parties hereunder shall cease, except

a) Such rights and obligations as may have accrued on the date of termination or

expiration,

b) The obligation of confidentiality set forth in Clause 25 hereof,

c) Any right which a Party may have under the Applicable Law.

38. Cessation of Services 1.93 Upon termination of this Contract by notice to pursuant to Clause 36hereof,

the Agency shall, immediately upon dispatch or receipt of such notice, take all

necessary steps as provided in Clause 36 hereof, to bring the Services to a close in a

prompt and orderly manner and shall make every reasonable effort to keep

expenditures for this purpose to a minimum.

39. Payment upon Termination 1.94 Upon termination of this Contract pursuant to Clause 36 hereof, the

Purchaser shall make the following payments to the Agency:

a) Remuneration pursuant “Payment Schedule” GCC 51 for Services satisfactorily

performed prior to the effective date of termination;

b) Reimbursable expenditures pursuant to “Terms of Payment” GCC 51 for

expenditures actually incurred prior to the effective date of termination; and

c) Except in the case of termination pursuant failure to perform, insolvency of the

Agency, deliberate false submission by the Agency or for failure to comply with the

final decision of an arbitration process, reimbursement of any reasonable cost

incident to the prompt and orderly termination of the Contract.

40. Assignment 1.95 The Agency shall not assign to any other party, in whole or in part, their

obligations under this Contract.

41. Disclaimer 1.96 Purchaser reserves the right to share, with any agency of its choosing, any

resultant Proposals in order to secure expert opinion.

1.97 Purchaser reserves the right to accept or reject any proposal deemed to be in

the best interest of the SRPC

42. Public Disclosure 1.98 All materials provided to the Purchaser by bidder are subject to Country public

disclosure laws such as RTI etc.

1.99 The Vendor shall not make or permit to be made a public announcement or

media release about any aspect of this Contract unless the Purchaser first gives the

Vendor its written consent.

43. Adherence to safety procedures,

rules regulations and restriction

1.100 Agency shall comply with the provision of all laws including labor laws, rules,

regulations and notifications issued there under from time to time. All safety and

labour laws enforced by statutory agencies and by Purchaser shall be applicable in

the performance of this Contract and Vendor’s Team shall abide by these laws.

1.101 The Agency shall take all measures necessary or proper to protect the

personnel, work and facilities and shall observe all reasonable safety rules and

instructions. Supplier’s Team shall adhere to all security requirement/regulations of

the Purchaser during the execution of the work. Purchaser’s employee also shall

comply with safety procedures/policy.

1.102 The Supplier shall report as soon as possible any evidence, which may indicate

or is likely to lead to an abnormal or dangerous situation and shall take all necessary

emergency control steps to avoid such abnormal ituations.

1.103 The Purchaser will be indemnified for all the situations mentioned

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44. Removal and/or Replacement of

Personnel

1.104 Except as the appropriate Purchaser may otherwise agree, no changes shall be

made in the Personnel. If, for any reason beyond the reasonable control of the

Agency, it becomes necessary to replace any of the Personnel, the Agency shall

forthwith provide as a replacement a person of equivalent or better qualifications.

If the Purchaser:

a) Finds that any of the Personnel has committed serious misconduct or has been

charged with having committed a criminal action, OR

b) Has reasonable cause to be dissatisfied with the performance of any of the

Personnel, then the Agency shall, at the Purchaser’s written request specifying the

grounds therefore, forthwith provide as a replacement a person with qualifications

and experience acceptable to the Purchaser.

1.105 The Agency shall bear all additional travel and other costs arising out of or

incidental to any removal and/or replacement, and

1.106 No extra payment is to be made to the agency due to such replacement of

personnel.

45. Fairness & Good Faith 1.107 The Parties undertake to act in good faith with respect to each other's rights

under this Contract and to adopt all reasonable measures to ensure the realization

of the objectives of this Contract.

1.108 Operation of the Contract: The Parties recognize that it is impractical in this

Contract to provide for every contingency which may arise during the life of the

Contract, and the Parties hereby agree that it is their intention that this Contract

shall operate fairly as between them, and without detriment to the interest of either

of them, and that, if during the term of this Contract either Party believes that this

Contract is operating unfairly, the Parties will use their best efforts to agree on such

action as may be necessary to remove the cause or causes of such unfairness, but no

failure to agree on any action pursuant to this Clause shall give rise to a dispute

subject to arbitration in accordance with Clause 14 hereof.

46. Insurance 1.109 The Agency shall take and maintain at their own cost, insurance coverage

against the risks to their personnel and properties relating to this assignment.

47. Conflict of Interest 1.110 The Process Agency shall not engage, and shall cause their Personnel not to

engage, either directly or indirectly, in any business or professional activities which

would conflict with the activities assigned to them under this Contract.

1.111 The Purchaser considers a conflict of interest to be a situation in which a party

has interests that could improperly influence that party’s performance of official

duties or responsibilities, contractual obligations, or compliance with applicable

laws and regulations, and that such conflict of interest may contribute to or

constitute a prohibited corrupt practice.

1.112 If the Agency is found to be involved in a conflict of interest situation with

regard to the present assignment, the Purchaser may choose to terminate this

contract as per Clause 36 of GCC.

48. Standard of Performance 1.113 The Agency shall perform the Services and carry out their obligations

hereunder with all due diligence, efficiency and economy, in accordance with

generally accepted techniques and practices used with professional engineering and

consulting standards recognized by professional bodies, and shall observe sound

management, and technical and engineering practices, and employ appropriate

advanced technology and safe and effective equipment, machinery, materials and

methods. The Agency shall always act, in respect of any matter relating to this

Contract or to the Services, as faithful advisers to the Owner.

49. Expiration of Contract 1.114 Unless terminated earlier pursuant to Clause 36 hereof, this Contract shall

terminate when, pursuant to the provisions hereof, the Services have been

completed and the payments of remuneration and reimbursable expenditures have

been made.

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50. Risk Purchase Clause

1.115 In the event of failure of the agency to provide service under this contract

within the stipulated date/period of the order, or in the event of breach of any of

the terms and conditions mentioned in the order, purchaser shall have the right to

procure such service from elsewhere after due notice to the defaulting agency at

the risk and cost of the defaulting agency. In the event of failure of the agency as

detailed above, the cost as per risk purchase exercise may be recovered from the

bills against any other contracts pending in purchaser.

51. Payment Schedule 1.116 The bidders may please note that the prices are Firm. All statutory taxes,

levies, duties, etc. shall be paid on actual.

Payment Terms:

The bidder shall quote VAT TIN, Service Tax Registration No. and PAN No. in the

offer.

Payment would be released via account payee cheque after deduction of statutory

dues such as TDS/eSTDS, etc.

Rates quoted shall remain firm till the completion of work. Rates are not subject to

revision under any circumstances.

Payment will be released on presentation of bills in triplicate via account payee

cheques/RTGS/NEFT within 60 days after completion of milestones and the same

being certified by the competent authority as per the following schedule.

For payment against Part A price(see price bid)

10% on submission of High level design document for implementation of

web based protection management system to SRPC.

25 % of the order value on delivery of 35 No of base license of protection

calculation engine along with laptops

5 % of the order value after completion of Training program on the desktop

based protection setting calculation software.

10 % of the order value after Building the network data for operational load

flow and fault calculation

15 % of the order value on completion of Protection database and

substation SLD preparation for protection study

10 % of the order value on delivery of required server hardware

10 % of the order value on delivery of web based database management

system

5 % of the order value on completion of Site Acceptance Tests with one pilot

state system

10 % of the order value after uploading all SRPC constituent data along with

SLD and Go Live.

For payment against Part B price(see price bid)

20% on completion of each annual support period.

The Certificate of Completion in respect of the works referred to in 1.116 above

shall not absolve the Agency from its liability to make good any defects

imperfections, shrinkages or faults which may appear during the period of

maintenance specified in the tender arising in the opinion of the Engineer from

materials or workmanship not in accordance with the drawings or specifications or

instruction of the Engineer, which defects, imperfections, shrinkages or faults shall

upon the direction in writing of the Engineer be amended and made good by the

Agency at his own cost; and in case of default on the part of Agency, the Engineer

may employ labour and materials or appoint another Agency to amend and make

good such defects, imperfections, shrinkages and faults and all expenses

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consequent thereon and incidental thereto shall be borne by the Agency and shall

be recoverable from any moneys due to him under the contract.

52. Monitoring Mechanism 1.117 Competent Authority shall nominate a monitoring committee for certification

of completion of milestones. No payment shall be released unless the competent

authority is satisfied with the completion of works envisaged as per the milestones.

The competent authority may design acceptance tests for some or all of the

milestones envisaged in the project within the overall scope of works and the

agency shall satisfy the competent authority with regard to the correctness of

response /performance of the system. The competent authority may choose to be

advised by technical experts from relevant field with respect to the design of

acceptance tests.

53. Acceptance Tests: 1.118 A list of the various planned tests and a brief explanation follows below:

Functionality Testing-Execute each function, using valid & invalid data to verify

the following: The expected result occurs when valid data used. The

appropriate error / warning messages are displayed when invalid data is used.

Integration Testing-Integration testing ensure that interface of coupling

between the module is working fine. The goal here is to see if the modules can

be integrated properly. Hence the emphasis is on testing interface between

modules.

System Testing- The System tests will focus on the behavior of the application.

Conditions specified in Software Requirement Specification will be executed

against the system and error message testing. Overall, the system tests will test

the system testing and verify that it meets the requirements defined in the

requirements document.

User Acceptance Testing-The purpose of these tests is to confirm that the

system is developed according to the specified user requirements and is ready

for operational use. Acceptance Testing checks the system against the

"Requirements". It is similar to systems testing in that the whole system is

checked but the important difference is the change in focus.

54. Guaranteed Availability and

Penalty

1.119 The supplier shall ensure that the Guaranteed Availability of the application

system shall not be less than 95% (Ninety five percent) during the period of 5 years

from the date of ‘go live’ on quarterly basis.

The following calculation shall determine the availability of the total system:

Scheduled Available Time – Downtime

% Availability = -------------------------------------------------------------------X 100

Scheduled Available Time

Scheduled Available time shall equate to 24 hours x 7 days per week.

In the event that the application system fails to achieve the guaranteed availability

as mentioned above, aggregated over the quarter, during 5 years period from the

date of ‘go live, SRPC shall be at liberty of deducting 1% contract value for every

percent reduction in availability from the agency’s bills/performance security as

penalty.

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Annexure-A

From: <Bidder> (On official letterhead)

To: The Member Secretary, SRPC, No. 29 Race Course Cross Road Bangalore-560 009 Sir, I/we ____________________________________Consultant / Developer Firm herewith enclose our bid for

appointment of my/our firm as the agency for implementation of________________. I/We hereby accept and abide by the

scope & terms and conditions of NIQ document unconditionally.

Yours faithfully,

Signature: _________________ Full Name: _________________ Address: _________________

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A. Proforma for Submission of Technical bid for Creation and maintaining a Protection Database and desktop based Protection Settings calculation tool for Southern Regional Grid

1 Name of Agency

2 Profile of the agency(in brief)

3 Name of proprietor/Director of the Agency

4 Full Address of Registered Office

a. Telephone No.

b. Fax No.

c. E-Mail address

5 Full Address of Local Office (ER)

6 a. Telephone No.

b. Fax No.

c. E-mail Address

7 All necessary supporting documents as mentioned in the technical qualification criteria as per

checklist

B.CHECK LIST for documents (to be self attested) to be enclosed with Technical Bid:

Sl.No Documentary proof of Attached (Y/N)

1. Completed at least ONE Job with the protection modeling, database building, simulations and setting calculation to a large transmission purchaser with more-than 150 plus sub-stations with the voltage level of 400kV to 132kV in the last 7(seven) years ending 31.03.2016. PO/WO/Completion Letter/Reference letter/Payment received

2. The proposed Protection analysis software must be in use for at least seven (7 ) years ending 31.03.2016 in any Indian State Electricity Boards /transmission companies. PO/WO/Completion Letter/Reference letter/Payment received

3. Details of software development center, technical and support team for support in India such as address, phone no and name of relevant personnel along with their designation should be provided

4. Average turnover for the past three financial years that is

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from 01.04.2013 to 31.03.2016 at least Rs. XXXXX/- Crores (Rupees XXXXX in words). Certificate from CA is to be submitted.

5. Tenderer must have the web based protection database software which can be customized to SRPC requirement and will be able to build/model the different manufactures relays. The software must have been in use for at elast last 7 years ending 31.03.2016. Copy of PO/WO/Completion Letter/Reference letter/Payment received

6. The tenderer must be able to assign minimum 20 number of power system & protection engineer on his role full time with Electrical Engineering degree for the works involved in the project. Attach Resume (Annexure B) with proposed work allocation such as data collection, update of database, database engineer, power system engineer, etc

7. The tenderer should have an office set up for technical support in the Southern region. Provide full address, telephone, fax, email address and contact personnel.

8. Whether work is proposed to be outsourced?

9. Has the bidder been blacklisted by any Government organization? If no then give declaration as per Annexure E

10. The bidder must have completed at least THREE works of not less than Rs. XXXXX/- Crores each OR at least TWO works of not less than Rs. XXXXX/- Crores each OR ONE work of not less than Rs. XXXXX/- Crores for power system analysis software development/supply for electrical utility in the last seven financial years that is from 01.04.2009 to 31.03.2016. Proof of the same like PO/WO/Completion Letter/ Reference letter/Payment received should be submitted along with the bid (cost should not include Hardware cost, taxes and not including any AMC component)

11. The bidder must have completed at least THREE works of not less than Rs. XXXXX/- Crores each OR at least TWO works not less than Rs. XXXXX/- Crores OR at least ONE work of not less than Rs. XXXXX/- Crores for protection system modeling database building and maintenance along with supply of software in power sector in the last seven financial years that is from 01.04.2009 to31.03.2016. Proof of the same like PO/WO/Completion Letter/ Reference letter/Payment received should be submitted along with the bid (Except hardware and before taxes and not containing any AMC component)

12.

The bidder must submit banker’s solvency certificate for at least Rs. XXXXX Crores (Rupees XXXXX in words only). Submit certificate from bank.

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13. Should have worked with at least one power utility in India for providing IT consulting (power system analysis software tool development/supply, data collection and database building activities) , in the last three financial years from 01.04.2013-31.03.2016.

14. Should have positive net worth in the last three audited financial years ended 31.03.2016. Submit certificate from CA

15. Power of Attorney as per format in Annexure

16. Manufacturer’s Authorization Form

17. Additional Information, if any which bidder intends to submit along with the tender like quality certifications

18. VAT/CST of the bidder. Please enclose copies

19. EMD draft. Please Enclose

20. Brief note on the work as understood by the bidder including a plan of action along with pert chart and proposed system architecture including details of hardware and software proposed with their technical specifications. Detailed methodology for executing the complete assignment along with key points. Deliverables and detailed technical specifications

21. Copies of latest service tax and income tax returns. Please submit return for last three years ending 31.03.2016.

22. Copy of PAN card, service tax registration certificate, VAT TIN registration certificate (if applicable)

23. Copy of registration certificate of the company of bidder/lead bidder

24. Turn-over certificate and P&L statement of past three financial years certified by CA.

25. Copies of ISO 9001 certification for software development and consultancy

26. Listing with NIC documentary evidence copy thereof in respect of bidder/lead bidder

27. Copy of the tender document signed on all the pages. Enclose copy

28. Receipt of tender fees to be enclosed.

C. Demonstration during Technical Evaluation:

Sl. No.

Key Functionality Availability

Yes No

01

Protection database software demonstration-it should be able to produce SLDs showing key protection elements along with the CT, PT, and different type of Relays modeled, run a sample base case LF on data provided, add/update various relay setting in the database and show their operation by simulating a fault.

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02

Key protection simulation functionality as at Annexure-A (Technical bid) shall be complied and confirmation documents shall be submitted along-with the bid. The same shall be demonstrated for the technical evaluation committee of SRPC.

03 Web Based Protection Database Management System with User Role management and tracking the details

04 Enhanced database creation including detailed modeling of all relay elements with standard libraries

05 Possible to create user defined Relay template and life cycle management of the relay

06 Possible to reduce Regional/ Bigger Transmission Network to equivalent network and to perform EMTP Simulation

07 Distance Relay simulation and showing the zone of Operation in the graph of R/X plot

08 Relay co-ordination can be conducted for relays of all make and with user defined characteristics for over current and earth fault relays.

09 Automatic / Interactive / Manual Primary-back-up relay pairs generation

10 Simulation of relay responses for the program Computed & Existing Field settings of the relays

11 Highlighting of Relay Operational Sequence after the analysis.

12 Fault simulation and relay trip currents plotted on the SLD for different type of fault currents including user defined fault current.

13 Fault Simulation and Relay trip sequence on the SLD and showing the sequence of relay pick-up.

14 Unit protection of Transformers/lines

15 Attaching the COMTRADE file to the Relay for analysis.

16 Performing the analysis of the single file COMTRADE file for the associated relay through the network element modeled.

17 Viewing of Analog and Digital plots of disturbance files stored in the relay using the COMTRADE Viewer.

18 Merging of two existing COMTRADE files received from disturbance recorder and removing unwanted channels and storing as a new COMTRADE file for further processing.

19 EMTP analysis for the given network and generating COMTRADE files to match with the disturbance records as part of the Post-mortem analysis.

20 Under frequency and df/dt relay modeling and simulation of load shedding schemes.

21 Possible to model user defined control block for simulation of AVR, Governor and special protection schemes.

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Annexure B

The following are the minimum Human Resource requirements to be deployed for the execution of the

tender(CV of the personnel proposed to be entrusted to be enclosed with detailed experience)

Key Personnel Qualifications/Experience No

Power System Advisors and Team Leader

He/ She should be Ph.D holder in power systems domain with 20 years of power system and protection field. He/ She should have advised several projects in protection and one project for complete modeling of network with protection elements and database modeling

2

Senior Power System Consultants

He/ She should be Bachelor/ Master’s Degree with more than 10 years of experience in transmission system protection analysis and studies.

2

Software Consultants/Experts

He/ She should be Bachelor/Master’s Degree with more than 7 years’ of experience in designing database concepts for power system products. He/she should have experience in handling data base structures for any reputed power system domain applications. He/ She should have successfully completed the implementation of database structure design for any power system application under reputed projects of India in the past 3 years.

2

Power System Engineers

He/She should be Bachelor /Master’s Degree holder in Electrical Engineering and should have minimum 3 years’ experience in power system consulting services and protection system

20

The format for submission of CVs is the following:

………………………………………………………………………………………………………………………………………………………………………

1. Name: __________________________________________________________

2. Profession / Present Designation: ____________________________________

3. Years with firm: ____________________Nationality: ____________

4. Area of Specialization: ___________________________________________

5. Proposed Position on Team: ______________________________________

6. Key Qualification/Experience: (Under this heading give outline of staff members experience and training most pertinent to assigned work on proposed team. Describe degree of responsibility held by staff member on relevant previous assignments and give dates and locations. Use up to half-a-page.)

7. Education: (Under this heading, summarize college/ university and other specialized education of staff member, giving names of colleges, dates and degrees obtained. Use up to quarter page.)

8. Experience: (Under this heading, list of positions held by staff member since graduation, giving dates, names of employing organization, title of positions held and location of assignments. For experience in last ten years also give types of activities performed and Owner references, where appropriate. Use up to three quarters of a page.

9. Language: (Indicate proficiency in speaking, reading and writing of each language by “excellent‟,

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“good‟ or “poor‟).

Signature : _________________

Full Name : _________________ Address : _________________

Date : _________________

Kindly ensure that the relevant work experience and its applicability to the present assignment are clearly articulated. The CVs should not be longer than 4 type-written pages.

Signature : _________________ Seal:

Full Name : _________________ Address : _________________

………………………………………………………………………………………………

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Annexure C

PROFORMA FOR PRICE BID TO BE SUBMITTED BY BIDDER

Creation and maintaining a web based Protection Database and desktop based Protection settings calculation tool for Southern Regional Grid

Sl No Item Price Quote

Part A. Price for completion of High level design, Web based database management tool-1 License, desktop based Protection settings calculation & Analysis tool with laptop computers - 35 Licenses, User Manuals- 35 sets, Associated servers for installation and Deployment of application and database software along with standard Operating, Training for 5 days at SRPC/SRLDC premise and 5 days at each constituent premises including printed reading material/soft files and all activities up to Go Live.

Part B 5 year comprehensive Support after Go Live including incorporation of any new network configuration, addition of new substation, change of relays, settings, CT/PT, support for database software, setting calculation tool and various analysis engines updates.

Total contract price* to be considered for determination of L1 party (Part A+PartB):

Part C

Taxes as applicable (estimated)

Part D

Grand Total (Part A+ Part B + Part C):

Date:.................... (Signature).................................

Place:.....................

Name.....................

Designation......…...

(Common Seal)

*The agency shall not be entitled to any other payments other than contract price and statutory taxes as applicable.

**The prices shall remain FIRM till completion of the Assignment.

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Annexure-D

Guarantee Declaration by Bidder

Bidder’s Name and Address: To: The Member Secretary


No. 29, Race Course Cross Road,

Bengaluru-560 009

Dear Sir,

1. We confirm that the services offered including all hardware, software and database building works shall have minimum performance specified in Technical Specification.

2. We further guarantee the performance/efficiency of all hardware, software and database building

works in response to the Technical Specifications.

Date:.................... (Signature).................................

Place:.....................

Name.....................


(Common Seal)

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Annexure-E

UNDERTAKING BY BIDDER

1. I,Son/Daughter/WifeofShri……………….…………..………………………………………………………,Proprietor/Director/authorizedsignatoryof………………………………..,is competent to sign this declaration and execute this tender document;

2. I, have carefully read and understood all the terms and conditions of the tender and undertake

to abide by them.

3. The information/documents furnished along with the above application are true and

authentic to the best of my knowledge and belief. I/we, am/are well aware o f the fact that furnishing of any false information/ fabricated document would lead to rejection of my tender at any stage besides liabilities towards prosecution under appropriate law.

4 Certified that no investigations is pending/legal action contemplated against

…………………………………….(name of agency) by any government authority to the best of my knowledge and belief.

5. Certified that the agency has not been blacklisted/ security deposit has not been forfeited in

case of the agency during the last five years.

Date:.................... (Signature).................................

Place:.....................

Name.....................


(Common Seal)

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Annexure-F MANDATE FORM ELECTRONIC FUND TRANSFER/ RTGS TRANSFER

To The Member Secretary, Southern Regional Power Committee No. 29 Race Course Cross Road Bangalore-560 009 Sub: Authorization for release of payment / dues from Southern Regional Power Committee, Bangalore through Electronic Fund Transfer / RTGS Transfer:

1. Name of the Party / Firm/ Company/ Institute:

2. Address of the Party: City _________________________________ Pin code _________________ E-mail ID _____________________________ Mob No: _________________ Permanent Account Number _______________________________________

3. Particulars of Bank

Bank Name Branch Name

Branch Place Branch City

Pin Code Branch Code

MICR No

(9 Digit number appearing on the MICR Bank of the Cheque supplied by the Bank, Please attach a Xerox copy of a cheque of your bank for ensuring accuracy of the bank name , branch name and code number)

IFS Code: (11 digit alpha numeric code)

Account Type Savings Current Cash Credit

Account Number

DECLARATION I hereby declare that the particulars given above are correct and complete. If any transaction delayed and not effected for reasons of incomplete or incorrect information I shall not hold, Southern Regional Power Committee, Bangalore responsible. I also undertake to advise any change in the particulars of my account to facilitate updating of records for purpose of credit of amount through NEFT/ RTGS Transfer. Place: _____________________ Date: _____________________ Signature & Seal of the Authorized Signatory of he Party

Certified that particulars furnished above are correct as per our records. Bankers Stamp: Date: Signature of the Authorized Official from the Bank N.B: Please fill in the information in CAPITAL LETTERS, computer typed; please Tick wherever it is applicable.

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Annexure-G BANK GUARANTEE FORMAT FOR PERFORMANCE SECURITY

To The Member Secretary, Southern Regional Power Committee No. 29 Race Course Cross Road Bangalore-560 009. WHEREAS M/s _________________________ having its office at _______________________________ (hereinafter referred to as the “ Supplier”) which expression shall repugnant to the context or meaning thereof, include its successors, administrators, executors and assigns), in pursuance of the Work Order/LOA No. ____________________ dated __________________________ has undertaken for execution of ___________________________ (hereinafter referred to as the “ Contract”) on behalf of Southern Regional Power Committee, Bangalore ( hereinafter referred to as the “ Purchaser”) AND WHEREAS it has been stipulated by you in the said contract that the “ Supplier” shall furnish you with a irrevocable bank guarantee by a Scheduled Commercial Bank for the sum specified therein as security for compliance with its obligations in accordance with the contract: AND WHEREAS we have agreed to give the “ Supplier” such a bank guarantee NOW THEREFORE we hereby affirm that we are guarantors and responsible to you, on behalf of the Supplier and we undertake to pay you, upon your first written demand declaring the “Supplier” to be in default under the contract and without cavil or argument, any sum or sums within the limits of (Rupees ____________________ as aforesaid, without your needing to prove or to show grounds or reasons for your demand or the sum specified therein. We hereby waive the necessity of your demanding the said debt from the Supplier before presenting us with the demand. We further agree that no change or addition to or other modification of the terms of the contract to be performed there under or of any of the contract documents which may be made between you and the Supplier shall in any way release us from any liability under this guarantee and we hereby waive notice of any such change, addition or modification. This guarantee shall be valid until the (Signature of the authorized officer of the Bank) .................................................................................. Name and Designation of the Officer …………………………………………………………………………….. Seal,name& address of the Bank and Address of the Branch.

Note:

1. The stamp papers of appropriate value shall be purchased in the name of bank who issues the `Bank Guarantee‟.

2. PBG should remain valid for a period of sixty days beyond the end of support period. 3. PBG Should be from a schedule commercial bank operating in India as approved by RBI. 4. It should be send directly by the banker of the vendor to Member Secretary, Southern Regional

Power Committee, Bangalore.

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Annexure-H

MANUFACTURER’S AUTHORIZATION FORM

The Bidder shall require the Manufacturer to fill in this Form in accordance with the instructions indicated. This letter of authorization should be on the letterhead of the Manufacture and should be signed by a person with the proper authority to sign documents that are binding on the Manufacturer. Date: [ insert date (as day, month and year) of Bid submission] Tender No. [ insert number from Invitation For Bids] To: [ insert complete name and address of Purchaser] WHEREAS We [ insert complete name of Manufacturer] who are official manufacturers of [insert type of goods manufactured], having factories at [insert full address of Manufacturer’s factories], do hereby authorize [insert complete name of Bidder] to submit a bid the purpose of which is to provide the following Goods, manufactured by us [insert name and or brief description of the Goods] and to subsequently negotiate and sign the Contract. We hereby extend our full guarantee and warranty in accordance with the General Conditions of Contract, with respect to the Goods offered by the above firm. Signed:[ insert signature(s) of authorized representatives(s) of the Manufacturer] Name:[ insert complete name(s) of authorized representative(s) of the Manufacturer] Title: [insert title] Duly authorized to sign this Authorization on behalf of : [insert complete name of Bidder] Dated on ___________________ day of _______________________ , _____________ [insert date of signing]

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Annexure-I

Agreement (On Non-Judicial Stamp Paper of appropriate value to be arranged by the agency)

THIS AGREEMENT is made this ________ day of ________________________, _____, between Southern Regional Power Committee (hereinafter called “SRPC”/”Purchaser”/”Owner”), of the one part, and __________________________________ of ______________________________ (hereinafter called “THE

Agency”/”Supplier”), of the other part: AND WHERAS the Purchaser invited bids for Related Services, viz.,

____________________________________________________________________ and has accepted a Bid

by the Consultant for the supply of those Related Services in the sum of ________________________________________________________ (hereinafter Called “the Contract Price”). NOW THIS AGREEMENT WITNESSETH AS FOLLOWS:

2. In this Agreement words and expressions shall have the same meanings as are respectively assigned to them in the Contract referred to.

3. The following documents (collectively referred to as “Contract Documents”) shall be deemed to form and be read and construed as part of this Agreement, viz.:

i. All provisions of Tender vide Reference No- Tender ID- Tender Name

including all Annexures/Appendices; ii. Vendor’s response (proposal) to the RFP, including the Bid Submission Sheet and the

Price Schedules submitted by the Supplier; i. The Purchaser’s Notification to the Supplier for Letter of Intent;

ii. Acceptance of purchaser’s notification iii. The Purchaser’s Notification to the Supplier for Letter of Award;

3. In consideration of the payments to be made by the Purchaser to the Agency as indicated in this Agreement, the Agency hereby covenants with the Purchaser to provide the Related Services and to remedy defects therein in conformity in all respects with the provisions of the Contract.

4. The Purchaser hereby covenants to pay the Consultant in consideration of the provision of the Goods and Related Services and the remedying of defects therein, the

Contract Price or such other sum as may become payable under the provisions of the Contract at the times

and in the manner prescribed by the Contract. IN WITNESS whereof the parties hereto have caused this

Agreement to be executed in accordance with the laws of ________________________ on the day, month

and year indicated above.

Signed by __________________________________________ (Authorized official on behalf of purchaser)

Signed by ___________________________________________(Authorized official on behalf of Supplier)

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Annexure-J

CERTIFICATE AS TO CORPORATE PRINCIPAL

(To be signed by any of Board Directors or Company Secretary)

I _______________________ certify that I am _________________ of the Company under the laws of

_____________________ and that __________________ who signed the above tender is authorized to bind the Company

/ Firm by authority of its governing body.

Signature : _________________ Seal: Full Name : _________________ Address : _________________

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Annexure-K

Approach and Methodology

Please provide details of methodology to be followed for successful implementation of the project. Please provide the details of the following:

a. UNDERSTANDING OF THE UTILITY AND ITS REQUIREMENTS (Also provide Prior interaction with Utility, if any) b. DETAILS OF METHODOLOGY c. PROJECT MANAGEMENT OFFICE STRUCTURE d. RESOURCE PLANNING AND ESTIMATION INCLUDING HARDWARE AND SOFTWARE

PROPOSED TO BE SUPPLIED e. RISK MANAGEMENT*

*Kindly provide a detailed list of all risks envisaged during the execution of the assignment and specify how the firm/consortium plans to mitigate each of them. Please also indicate the seriousness of each risk envisaged on a scale of 1 to 5 with 1 being “Not Serious‟ and 5 being “Very Serious‟.

Signature : _________________ Seal: Full Name : _________________ Address : _________________

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1/35 Grid Occurrences discussed in 52nd

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Grid Occurrences - 52

1. Details of Grid Disturbances (GD’s):

1 Complete outage of 230kV Tiruvalam Substation of TANTRANSCO

(i) Date and Time of Event 10-2-2016 at 15:42hrs

(ii) Location 230kV Tiruvalam substation

(iii) Reported Disturbance /

Fault

Mal-operation of 230 KV Bus Bar protection relay at 230 KV

Tiruvalam Substation led to tripping of all 230 kV feeders and

resulting in total supply failure

(iv) Generation/ Load Loss

(v) Category GD-1

SLD:

• Single Line Diagram of 230 kV Tiruvalam SS as provided by TANTRANSCO is attached at the end.

As per Tripping Report of TANTRANSCO dated 21.03.2016:

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TANTRANSCO:

• It was a suspected case of mal-operation of BBP relay (RADSS realy; ABB make). Because there was no

indication of Phase-flags (R, S, T) that denotes pick-up in a particular phase; only U-flag (tripping flag)

indication was observed.

• There was no visible fault. Relay spill current was measured and found to be normal

• The measuring unit of the relay was got tested by the manufacturer and found to be OK.

• On this point, KSEB suggested that since the in-built main and check zones of RADSS relay derive the current

from same CT-core, it’s better to provide a separate Check relay in series with the BBP relay.

• To this, TANTRANSCO replied that providing separate (over current) check relay is practically very difficult as

it requires wiring all CT cores to that relay. In any case, since the station is on single-bus, single zone

operation, no useful purpose will be served by providing separate check relay.

• As a permanent solution, TANTRANSCO has planned for commissioning of numerical bus bar protection

(BBP), replacement of existing bus-section isolator with bus-coupler breaker, and configuring BBP for two

main-zone operation in addition to check-zone as part of upgradation works.

2

Complete outage of 220kV Yerraguntla substation and tripping of running Units at Rayalaseema TPS

(i) Date and Time of Event 21-02-2016 at 10:39 hrs

(ii) Location 220kV Yerraguntla substation and tripping of running Units at

Rayalaseema TPS


Fault

HV B-Ph Current transformer of 100MVA Power Transformer -1

failed resulting into a bus fault on 220KV Bus-1. Unit-1 and Unit-5

at RYTPS tripped during the fault at Yerraguntla substation

(iv) Generation Loss 400 MW

(v) Category GD-1

SLD:

• The single line diagram of Yerraguntla SS as provided by APTRANSCO is attached at the end.

Outage of 220 kV Yerraguntla SS of APTRANSCO:

• As per FIR, HV B-Ph Current transformer of 100MVA Power Transformer -1 blasted at 10:36 hrs resulting into

a bus fault on 220KV Bus-1. Bus bar protection of 220kV bus-1 got operated tripping the elements connected

to bus-1. However the Bus coupler breaker did not trip with actuation of bus-bar protection. LBB of Bus

coupler breaker operated resulting in tripping of both 220kV buses at Yerraguntla substation.

• DR & proper EL not furnished.

• As per the part-EL (uploaded in place of DR), the following were observed:

� Zone-1 BBP (B-ph) operated at 10:15:47.753 hrs. However, B/C CB did not trip with actuation of BBP.

Before its LBB could act, the fault got cleared (in about 50 sec).

� Again at 10:15:49.748 hrs, BBP (all phases) operated. This time also B/C CB did not trip with actuation of

BBP. But, its LBB acted this time to open both the buses (Bus-1 and Bus-2) resulting in outage of

Yerraguntla SS.

• Time-sync of EL with GPS needs to be ensured.

Tripping of RyTPS Unit-1:

• As per FIR, 100MVA, Transformer-1’s CT blast at 10:36 hrs at 220 kV Yerraguntla SS (which is 20 km away

from RyTPS) caused heavy voltage dip at RyTPS. This Voltage disturbance caused Unit-1 to trip on 'Furnace

Pressure V.Low'

• DR & EL not furnished. Tripping of RyTPS Unit-5:

• As per FIR, 100MVA, Transformer-1’s CT blast at 10:36 hrs at 220 kV Yerraguntla SS (which is 20 km away

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from RyTPS) caused heavy voltage dip at RyTPS. This Voltage disturbance caused Unit- 5 to trip on 'Both ID

Fans OFF'.

• DR & EL not furnished.

APTRANSCO (w.r.t. outage of 220 kV Yerraguntla SS):

• HV side B-phase CT failure of 100 MVA Transformer-1 had created a bus fault on Bus-1 and tripped all the

bays connected to the Bus-1 except the Bus coupler breaker. Since B/C CB did not open, Bus-1 was alive. But

before B/C CB’s LBB could act, the fault got cleared (in about 50 sec).

• After about 2 sec, the heavy smoke that resulted from previous bus fault created second bus fault. This

caused BBP to operate. However, as the B/C CB did not open, it’s LBB operated tripping CB’s connected to

Buses 1 and 2.

• It was later diagnosed that Bus coupler failed to open due to problem in its master trip relay (it got stuck).

• Remedial action:

� The failed CT and the faulty trip relay associated with B/C CB were replaced with spare.

APGENCO (w.r.t. RyTPS, Unit-1 tripping):

• Due to the bus fault at 220 kV Yerraguntla SS, there was a heavy dip in voltage. This resulted in the under

voltage relay’s contactors at RyTPS to drop instantaneously. Even though the voltage recovered within 2 sec

due to clearance of the fault, the lube oil pump’s pressure could not regain to its normal value, and tripped

the associated Mills on Low pressure indication. Due to this, Unit -1 protection acted and tripped the Unit.


� The pressure drop-off relay time setting was revised from 2 sec to 8 sec.

• On this, NTPL & TANGEDCO pointed out that the fact that lube oil pressure was not regained in 2 sec

indicates that there could be a problem with pressure switches or the pressure level prior to the tripping

event might be at its lowest level.

• SRLDC also opined that it’s better to check associated pump logic for correct operation. APGENCO (w.r.t. Unit-5 tripping):

• Unit- 5 was commissioned recently. Due to the wrong time setting of VFD speed sensor associated with the

ID fans, the dip in system voltage due to bus fault at 220 kV Yerraguntla SS caused it to give tripping

command instantaneously to ID fans. issued a trip command. As such, Unit-5 tripped on 'Both ID Fans OFF'.

• On this, SRPC pointed out that time delay setting to be adopted for VFD speed sensor relay was deliberated

in PCSC-44 in the context of SR and NEW grids separation event on 24.05.2015 (GD-I.3) when it was

recommended to all generators in the Southern region to implement appropriate time delay in VFD speed

sensor relay (typically 2sec). And the fact that Unit-5 tripped due to same reason indicates a serious lapse on

the part of APGENCO to implement the said recommendation at its generating stations.

Recommendations:

APGENCO to check associated logic for lube oil pump for correct operation under transient low voltage

conditions at Rayalaseema TPS, Unit-1. APGENCO to keep appropriate time delay/ fault ride through delay (typically 2 sec) in VFD speed sensor

relay at all its generating Units including Rayalaseema TPS Units.

3

Complete outage of 220kV Shimoga substation


(ii) Location 220kV Shimoga substation


Fault

220kV Bus Bar protection operated during failure of R phase CT

in DVG-2 line bay.


(v) Category GD-1

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SLD:

• The single line diagram of 220 kV Shimoga SS as provided by KPTCL is attached at the end.

As per FIR of Shimoga SS of KPTCL:

• Complete outage of Shimoga substation occurred at 15.03 hrs due to 220 kV Bus Bar protection operation

during Flash over of R phase CT in 220kV Davanagere -2 line.

• Arrangement of lines/ transformers prior to Fault: All 220kV lines and transformers were connected to

single bus during the instance. SGS connected lines S2, S3, S4 and B1 were under open condition.

• During the event, Bus Bar Protection (96 relay) operated (As per the bay arrangement, CT is towards bus

side. Hence Bus bar protection operated as failure of DVG-2 line CT is a bus fault).

• It was informed that DR and EL records for this incident is not available as the existing bus bar protection is

of static type.

SRLDC:

• The above GD basically occurred because of single-bus operation. Hence, the station should be put on to

double bus operation forthwith.

Recommendations:

KPTCL to operate 220 kV Shimoga on multi-bus operation under normal conditions, put it on single-bus

operation only under emergency conditions.

4 Complete outage of NTPL power station


(ii) Location 400 kV NTPL power station


Fault

400kV Coastal-NTPL, 400kB NTPL-Tuticorin PS and running units

at NTPL tripped during the incident. LBB protection got operated

at NTPL


(v) Category GD-1

*** File Naming Nomenclature not followed by NTPL and CEPL. SLD:

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Pre-Fault Condition:

• Unit 1: 437 MW

• Unit 2: 408 MW

• Feeder 1 (NTPL-CEPL): 207.3 MW (Bus I) ---- Bay: 404

• Feeder 2 (NTPL-Tuticorin PS): 551 MW (Bus II) --- Bay: 406

400 kV NTPL – Tuticorin PS S/C line: NTPL end:

• As per FIR/DR/EL, the line tripped (in Y-ph) at 7:20:16.821 hrs on Y-E fault due to A/R operation (Z1 and Z1B;

10.8 kA; 9.5 km from NTPL end). However within 250 msec from A/R initiation, the other Poles (R-ph & B-

ph) also got tripped.

• From EL, DT send was observed at 07:20:17.058 hrs. Tuticorin PS (PGCIL-SR2) end:

• As per FIR/DR/EL/TR, the line tripped (in Y-ph) at 07:20:16.810 hrs on Y-E fault due to A/R (Z1) operation.

However within 250 msec from A/R initiation, the other Poles (R-ph & B-ph) got tripped due to DT receipt

from the remote end.

400 kV NTPL – CEPL S/C line: NTPL end:

• As per FIR/DR/EL, the line tripped (in B-ph) at 7:20:32.202 hrs on B-E fault due to A/R operation (Z1; 7.35 kA;

4.7 km from NTPL end). However within 230 msec from A/R initiation, the other Poles (R-ph & B-ph) got

tripped.

• From EL, DT send was observed at 07:20:32.441 hrs. CEPL end:

• As per FIR/DR/EL/TR, the line tripped (in B-ph) at 07:20:32.202 hrs on B-E fault due to A/R (Z2, CAT)

operation. However within 230 msec from A/R initiation, the other Poles (R-ph & Y-ph) got tripped due to DT

receipt from the remote end.

Tripping of NTPL, Unit-1:

• As per FIR/EL, Unit-1 tripped at 07:20:33.838 hrs due to operation of Low Forward Power (LFP) protection.

• In DR all V & I’s were superimposed. Also LFP event was not shown.

Tripping of NTPL, Unit-2:

• As per FIR/DR/EL, Unit-1 tripped at 07:20:33.058 hrs due to operation of Over Frequency (OF) protection.

• In DR all V & I’s were superimposed. Also OF event was not shown.

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NTPL:

• Remedial Action (NTPL):

� DT signal sending during A/R dead-time was traced to some wiring problems from the Auxiliary tripping

Relay to CB. The same was rectified.

� The protective relays were checked for wiring in both the feeders. In 404 CEPL feeder instead of 1-Pole

LBB initiation during auto-reclosure attempt, 3-Pole LBB initiation was not noticed due to wiring

interchange. The same was rectified.

� From the repeated auto-reclosure failure events, they suspected some problem with the Main-I and

Main-II relays (Siemens make). This was confirmed later by replaying the corresponding DR’s on Micom

relays, and noticing the successful A/R operation in each case. Therefore, the matter was taken up with

OEM. It is further observed that whenever the fault current/pre fault load current is high, auto-reclosure

is failing due to delayed resetting of Zone-1 element. So, following changes, as suggested by OEM, have

been done temporarily in Main-I and Main-II relays:

� The Zone- 1 resetting time which was kept higher at 300ms, has now been revised to 100ms.

� The distance threshold (pick-up) has also been increased from 0.1 to 0.4.

� The failure of auto-reclosure during transient condition has also been taken up with M/s Siemens for

permanent solution.

PGCIL (SR-II):

• Insulator replacement works on 400 kV NTPL – Tuticorin PS were completed by 28.03.2016.

5 Complete outage of 220kV Regulapadu substation of APTRANSCO

(i) Date and Time of Event 02.03.2016 at 14:32 hrs

(ii) Location 220kV Regulapadu substation

(iii) Reported Disturbance / Fault 220KV R-ph Metering PT failed at 220KV Regulapadu Substation.

(iv) Generation Loss Nil

(v) Category GD-1

SLD:

• The single line diagram of Regulapadu SS as provided by APTRANSCO is attached at the end.

Outage of Regulapadu SS of APTRANSCO:

• As per FIR of APTRANSCO, 220KV R-ph Metering PT got blasted at 14:32 hrs. The fault got cleared from the

remote ends.

• From PMU plot, voltage dip was prominent in B-phase voltage, and observed for 360ms.


220 kV Regulapadu – Alipura S/C line: Regulapadu (APTRANSCO) end:

• As per FIR of APTRANSCO, 220 kV R-ph Metering PT got blasted at 14:32 hrs. The fault got cleared by the

remote end source feeders.

• DR & EL not furnished. Alipura (KPTCL) end:

• No files FIR/DR/EL/TR furnished.

APTRANSCO:

• BBP was not present at 220 kV Regulapadu SS, due to which bus fault created by the blasting of R-ph

Metering PT got cleared in Zone-2 from remote ends.

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• When enquired about reasons for single-bus operation at 220 kV Regulapadu SS, it was informed that the

station was basically serving radial loads (lift irrigation loads plus feeders serving radial loads at the other

ends). Further, there was only one source feeder (220 kV Gooty feeder) feeding the substation. As such,

providing multi-bus operation or bus-sectionalizer CB was not envisaged.


� BBP will be commissioned as part of R&M works.

� Regarding A/R provision on 220 kV Regulapadu – Alipura S/C line, it was informed that the present

hanging type wave-trap at Regulapadu end needs structural modifications to support A/R functionality,

and they would be providing it in another 3-month time.

KPTCL:


� KPTCL informed that the line charged as per SLDC instructions. Alipura end distance relay settings will be

reviewed and arrangement will be made to trigger DR in main-1 distance protection for tripping of line

on back-up protection.

Recommendations:

APTRANSCO to furnish the Equipment Failure Report for the R-ph CT blast to Power System Engg &

Technolgy Divison (PSETD) of Central Electricity Authority with a copy marked to SRPC.

6

Complete outage of 220kV Malyalapalli station of TSTRANSCO

(i) Date and Time of Event 10-03-2016at 18:41 Hrs

(ii) Location 220kV Malyalapalli station


Fault

CT failure occurred in 220kV Ramagundam-Malyalapalli line-1 at

Malyalapalli end. The CT failure resulted into a Bus fault. All

220kV lines and transformers at Malyalapalli station tripped

during the incident.


(v) Category GD-1

SLD:

Annexure- IV


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Outage of 220 kV Malyalapalli SS of TSTRANSCO:

• As per FIR, all 220kV feeders & PTRs connected to 220kV Malyalapally SS tripped due to blasting of R-ph CT

of 220kV Malyalapalli - NTPC line-1.


TSTRANSCO:

• 220kV Malyalapalli SS has two Main Bus with a Bus coupler scheme with Bus Bar Protection.

• However, prior to the tripping event, BBP at 220kV Malyalapalli SS was taken out of service for replacement

of central processing unit due to problem in communication port. As bus bar protection was out of service,

remote end feeders tripped on operation of zone-2 protection.

• Fault clearing time was observed to be 320ms from PMU data plot.

Tripping of 220 kV RSTS – Malyalapalli lines – 1&2&3 and 132 kV RSTPS – Malyalapalli line-1: RSTPS, NTPC end:

• As per FIR/TR, above lines have tripped on distance protection at NTPC, Ramagundam due to a fault in 220

kV Malyalapalli SS of TSTRANCSO. It was informed that all the ICTs were in service at NTPC, RAMAGUNAM.

But from EL of 220 kV line-2, the following was observed:

� Auto transforme-3 Overload protection operated.

� Auto Transformer-2 Trip Relay 86LV operated.

• EL furnished for 220 kV line-2 does not indicate trip due to DPR, Z2 operation.

• From DR, 132 kV line -1 tripped at 18:37:52.695 hrs due to DPR, Z3 operation (with a delay of 1 sec).

• From DR, 220 kV lines-1 tripped at 18:39:10.590 hrs due to DPR, Z2 (with a delay of 380 msec).

• DR not furnished for 220 kV lines-2 & 3, (Uploaded DR was that of 220 kV line-1).

• EL not furnished for 132 kV line-1 and 220 kV lines-1 & 3.

Recommendations:

TSTRANSCO to furnish the Equipment Failure Report for the R-ph CT blast to Power System Engg & Technolgy

Divison (PSETD) of Central Electricity Authority with a copy marked to SRPC.

Annexure- IV


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7 Complete outage of 220kV Srisailam right bank station


(ii) Location 220kV Srisailam right bank station


Fault

LBB Protection of 220KV Srisailam-Bilakala Gudur feeder got

operated resulting in tripping of both Bus-I and Bus-II


(v) Category GD-1

SLD:

The following were noted from the FIR furnished by APGENCO:

• Pre-fault configuration of feeders: Bus-I: 220KV BILAKA GUDURU; 220KV MARKAPURAM; 220KV DINDI-I; 220KV TALLAPALLI-1; 220KV NAGARJUNASAGAR; 100MVA POWER TRANSFORMER Bus-II: 220KV SOMAYAJULAPALLI; 220KV MYDUKURU; 220KV PODILI; 220KV TALLAPALLI-2; 220KV DINDI-2

• At the time of tripping, generating Units were not in service.

• On 220KV Srisailam-Bilakaguduru feeder, DPR operated at 14:36 hrs from Srisailam end. However, the

corresponding BHEL-make MOCB did not trip (which later found out to be due to problem in breaker

mechanism); hence the LBB protection relay initiated and tripped Bus-I.

• At same time, on the 220 kV Srisailam-Mydukuru feeder the ABB make RXMVB-2 (Model) Bus-II isolator

change over relay had failed and operated the Bus-I and Bus-II interconnected relay. This led to extension of

TRIP command from Bus-I to Bus-II, due to which all feeders connected to Bus-II also got tripped.


APGENCO:

• Just prior to the tripping event a line fault (R-E) had occurred on 220KV Srisailam-Bilakala Gudur feeder.

Bilakala Gudur end sensed the fault in Zone-1 and tripped its corresponding CB. Srisailam end also sensed the

Annexure- IV


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fault in Zone-1 and gave a 3-ph trip. However due to breaker mechanism problem, R-ph limb had not

opened. Due to this, LBB protection acted and tripped all CB’s connected to Bus-I.

• At the same time, CB’s connected to Bus-II also got tripped due to extension of TRIP command from Bus-I to

Bus-II.

• On detailed analysis, it was later found out that on the 220 kV Srisailam-Mydukuru feeder the ABB make

RXMVB-2 (Model) Bus-II isolator changeover relay had failed and operated the Bus-I and Bus-II

interconnected relay. This led to extension of TRIP command from Bus-I to Bus-II, due to which all feeders

connected to Bus-II also got tripped.

• At this point, KSEB pointed out that had there been a failure of Bus-II isolator changeover relay, some

annunciation must have come, noticing which corrective action could be taken by the shift personnel in time.

To this, APGENCO replied that it was somehow missed out by the shift personnel.

• DR & EL were not available as the relays are of Static type. By April end, all relays will be of numerical type.


� The faulty bus-isolator changeover relay was replaced.

� Replacement of Minimum Oil type CB’s by SF6 CB’s is in progress, and will be completed by April, 2016. SRLDC:

• Time of occurrence of fault was not clear as no fault current (negative & zero sequence) could be observed

from PMU plots. APGENCO needs to confirm the time of tripping event.

• On this, TANTRANSCO suggested that since some of the feeders have been provided with Numerical relays

at Srisailam end, time of the tripping event can be established from their corresponding EL’s.

• To this, APGENCO assured that they would check and revert soon.

8 Complete outage of 400kV NTPL station and CEPL Stations


(ii) Location 400kV NTPL station and CEPL station


Fault

Running Units at NTPL and Coastal Energen power station got

tripped due to tripping of evacuating lines.


(v) Category GD-1

SLD:

• The single line diagrams of CEPL and NTPL stations are attached at the end.

Tripping of 400 kV NTPL-Tuticorin PS S/C line at 01:12 hrs: NTPL end:

• As per TR/EL, the line tripped (in R-ph) at 01:12:23.011 hrs on R-E fault due to A/R operation (Z1 and Z1B;

10.2 km from NTPL end). However within 270 msec from A/R initiation, the other Poles (Y-ph & B-ph) got

tripped.

• DR not furnished. Tuticorin PS (PGCIL-SR2) end:

• As per FIR/DR/EL/TR, the line tripped (in R-ph) at 01:12:23.011 hrs on R-E fault due to A/R (Z1) operation,

and successfully auto-reclosed after 1 sec.

Charging & Tripping of 400 kV NTPL-Tuticorin PS S/C line at 1:36 hrs: NTPL end:

• From FIR/DR/TR, the line charging was attempted at 01:36 hrs, but as the Y-ph pole remained open, the

other poles (R-ph & B-ph) got opened at 01:36:17.153 hrs. (This may possibly be due to PDR operation).

• From EL, the line charging attempted at 01:36:15.740 hrs. However, Y-ph pole did not close. So the other two

poles (R-ph and B-ph) got opened at 01:36:18.229 hrs. (The reason, which may possibly be due to PDR

Annexure- IV


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operation, was not mentioned).

• PDR status flag was not shown in either DR or EL. Tuticorin PS (PGCIL-SR2) end:

• As per FIR/TR, the line tripped (in 3-ph) at 01:36 hrs on L-L-L-E fault due to DPR, Z1 operation.

• From DR, the line tripped in 3-ph at 01:36:17.244 hrs on L-L-L-E fault due to DPR, Z1 operation.

Tripping of 400 kV Tuticorin PS – CEPL S/C line at 01:36 hrs: Tuticorin PS (PGCIL-SR2) end:

• As per FIR/DR/EL/TR, the line tripped (in 3-ph) at 01:36:16.846 hrs due to DPR, Z4 (reverse zone) operation. CEPL end:

• As per FIR/ TR, the line was kept holding form CEPL end.

• It was noted from DR that DEFR picked up at CEPL end, but before this could trip, the line tripped from

Tuticorin PS end in Zone-4.

Outage of NTPL & CEPL Stations:

• In view of tripping of all evacuation lines, all the running units, i.e, two units of NTPL (870MW) and one unit

of Coastal (560MW) got tripped. The total loss of generation was around 1430MW.

• Finally at 02:14hrs, the 400 kV NTPL-CEPL line was hand tripped from NTPL end.

NTPL:

At 01:36 hrs, while synchronising the NTPL-TTNPS feeder, the Y-pole did not close due to auxiliary contact

problem, and the same was rectified. Eventually, the line tripped after 2.5 sec due to PDR operation.

PGCIL (SR-II):

• When NTPL tried to synchronize the Tuticorin PS- NTPL line at 01.36hrs, only R&B phases were closed; Y-Ph

was not closed at NTPL end and the circuit breaker tripped on operation of pole discrepancy. Due to this, the

current distribution in 400 kV CEPL-Tuticorin PS S/C line has become 1200A, 1900A, 1200 A, and 500A in R, Y,

B phases and Neutral respectively.

• Due to the above unbalance current, both Main-I and Main-II relays at Tuticorin PS end on 400 kV CEPL -

Tuticorin PS line picked up in Zone-4. Though Main-I relay got reset, Main-II relay persisted in Zone-4, and

tripped the line after about 1 sec (Zone-4 time delay). It was later found out that due to contacts of the

Main-II relay got latched when it’s impedance locus shifted momentarily to Zone-4. This ultimately resulted

in tripping of the line from Tuticorin PS end in Zone-4.

SRLDC:

• Tripping of NTPL and Coastal units (loss of 1430MW) resulted in increased power flow on 765kV Solapur-

Raichur lines leading to SPS operation.

� SPS operation details:

State Load relief during

SPS operation at

01:36 Hrs (MW)

Andhra Pradesh 88

Telangana 0

Karnataka 100

Tamil Nadu 64

Kerala 0

Total 252

ED, SRLDC:

• As the reasons for tripping of NTPL – TTNPS line and CEPL-TTNPS line at 1:36 hrs is not very clear, it is a fit

case for conducting Protection System Analysis Group (PSAG-15) meeting at NTPL to ascertain in depth the

reasons for the trippings.

Annexure- IV


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• To this, MS, SRPC agreed to form a PSAG Committee that would go into the details of the trippings, and

suggest suitable measures to prevent recurrence of such events.

Recommendations:

NTPL and PGCIL (SR-II) to furnish compliance report of the recommendations given by PSAG-15 Committee to

be conducted on 12-13 April, 2016 at NTPL, Tuticorin.

9 Complete outage of 400kV NTPL station


(ii) Location 400kV NTPL station


Fault

Running Units at NTPL power station got tripped due to tripping

of evacuating lines.


(v) Category GD-1

Tripping of 400 kV NTPL – Tuticorin PS S/C line at 02:02 hrs: Tuticorin PS (PGCIL-SR2) end:

• As per FIR, the line was kept holding from Tuticorin PS end. NTPL end:

• As per FIR/TR, the line tripped at 02:02 hrs on R-E fault due to DPR, Z2 operation.

• From DR/EL, the line tripped in 3-ph at 02:02:51.007 hrs due to DPR, Z2 and Z3 operation with a delay of

about 1.25 sec. (No carrier send or receive was observed).

Tripping of 400 kV NTPL – CEPL S/C line at 03:39 hrs: NTPL end:

• As per FIR/DR/TR, the line tripped (in R-ph) on R-E fault at 03:39:09.675 hrs due to A/R operation (Z1 and

Z1B; 12.3 km from NTPL end). However within 400 msec from A/R initiation, the other Poles (Y-ph & B-ph)

got tripped. CEPL end:

• As per FIR/DR/EL/TR, the line tripped (in R-ph) at 03:39:09.672 hrs on R-E fault due to A/R operation (Z1),

and auto-reclosed successfully after 1 sec.

NTPL Station Outage:

• At the time of tripping of NTPL-CEPL line at 03:39 hrs, NTPL-Tuticorin PS line was not yet restored. As such

the only running Unit of NTPL (with generation 415 MW) also tripped at 03:39 hrs. due to loss of all

evacuating lines.

NTPL:

• Around the same time as NTPL-TTNPS tripping (i.e., at 2:02 hrs), a transient R-N fault occurred on NTPL-CEPL

line; For this fault, the relay at NTPL end on NTPL-TTNPS over-reached, and tripped the line from NTPL end.


� Resistive reach for Phase-Earth faults had been reduced.

• The tripping at 03:39 hrs was due to improper functioning of A/R. This had been so in spite of carrying out

certain modifications after the 02.03.2016 grid disturbance.

• Remedial action

� The matter had been taken up with OEM, M/s Siemens; it was suggested to remove all additional logic.

� Modification work in this regard was under progress, and would be completed by the first week of April.

Annexure- IV


PCSC (30-03-2016)

• It was decided to include the analysis of this grid disturbance in the scope of PSAG-15 Committee that would

be visiting NTPL to analyze the grid disturbance that occurred there on 14.03.2016.

Recommendations:

NTPL to furnish compliance report of the recommendations given by PSAG-15 Committee to be conducted

on 12-13 April, 2016 at NTPL, Tuticorin.

2. Details of Grid Incidents (GI’s):

Sl.

No. Details of Event Date & Time Reason Category

1

Tripping of 400 kV

Chittoor-Sriperambadur

line

01-02-2016 at

9:55 hrs

line tripped on operation of line reactor

protection at Sriperambadur end and direct

trip was sent to Chitoor. Buchholz relay of line

reactor of 400kV Chitoor-Sriperambadur got

operated at Sriperabadur end.

GI-2

Chittoor (APRANSCO) end:

• As per FIR, line tripped at 9:55 hrs due to DT receipt from Sriperambadur end.

• From DR, line tripped at 9:48:48.600 hrs due to Carrier receipt from Sriperambadur end. (DT receipt flag was

not shown).

• EL furnished contains only the following:

It does not contain information on DT receipt event.

• Time synchronization of DR and EL with GPS needs to be ensured.

Sriperambadur (PGCIL-SR2) end:

• From FIR/DR/EL/TR, line tripped at 9:55:06.741 hrs due to operation of Reactor protection.

• In TR, it was stated that line tripped due to Buccholtz relay (alarm relay) operation at local end, and sent DT

to remote end. It was also stated that no on-line Dryer unit is in service for Chittoor L/R.

PGCIL (SR-II):

• During replacement on-line filtering analyzer’s cartridge, some air bubbles/ moisture accidentally got into

Buchholz relay, and caused it to trip the line.

Recommendations:

• APTRANCO to take steps to ensure that DR and EL are configured for recording DT receipt event at their

220 kV Chittoor substation.

2 Tripping of 400/220 kV

ICT-3 at Raichur TPS 05-02-2016 at

3:01 hrs

ICT-3 tripped on operation of Stub protection

due to malfunction of Contact multiplier of

Line isolator GI-2

• As per FIR/TR furnished by KPCL: � On 05.02.2016 at 03:01 hrs ICT-3 was tripped on operation of Stub protection due to malfunction of

Contact multiplier of Line isolator (7A89-13). During this event, 220 KV RTPS-Sedam line-2 was tripped

Annexure- IV


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on Zone-I protection with a fault distance of 1.2%.

� Voltages & currents measured in ICT 3-P645 relay were as follows:

� IA-HV: 285.3 A; IA-LV: 560.9 A; VAN: 213 KV

� IB-HV: 618.2 A; IB-LV: 214.7A; VBN: 304.7 KV

� IC-HV: 3.096 KA; IC-LV: 6.634 KA; VCN: 160.6 KV

• From DR/EL, ICT-3 tripped at 03:01:03.795 hrs due to operation of Stub Protection.

KPCL:

• On detailed inspection, it was found that Contact Multiplier of HV-side isolator (7A89-13) got failed leading

to “Stub Enable” input high in the relay.

• Now, when 220 kV RTPS –Sedam line-2 tripped on line fault, the instantaneous current reflected on the HV

side of the transformer combined with the Stub Enable input HIGH caused Stub protection to operate.


� The contact multiplier was replaced with new one. ICT-3 was charged at 05:25hrs after inspecting

switchyard & transformer.

3 Tripping of 400/220kV

ICT-2 at Hoody substation

11-02-2016 at

15:54 hrs Fuse Failure relay burnt out and Back up over

current trip relay got operated

12-02-2016 at

16:42 hrs ICT tripped while testing/ replacing of PT Fuse

failure relay

Tripping on 11-02-2016 at 15:54 hrs:

• As per FIR, ICT-2 tripped at 15:55 hrs due to operation of B/U OC relay, which in turn was caused due to

burnt out of VT Fuse Failure Relay. Tripping on 12-02-2016 at 16:42 hrs :

• As per FIR, ICT-2 tripped at 16:455 hrs while testing/replacing of PT Fuse failure relay.

KPTCL:

• KPTCL informed that fuse fail relay was burnt during the instance. Upon detailed verification of 500MVA ICT-

2 trippings that occurred at Hoody on 20.01.2016, 11.02.2016 and 12.02.2016, the following observations

were made.

� On 20.01.2016, PT fuses were blown out in ICT-2 CRP.

� On 11.02.2016, fuse fail relay was burnt out and ICT-2 tripped on IV side due to OCR (B-ph) protection.

• R&M works were being carried out at 220 kV switchyard, due to which some Earth mat extension contacts

between 220 kV and 400 kV sides got disconnected. As a result, 220kV and 400kV sides earth potential were

at different levels. This voltage difference reflected between PT fuse failure relay body and the equipment so

much so that the fuses and the relay ultimately got burnt out.

• On 11-02-2016, there was a fault on Auxiliary Cable, and an abnormal voltage came across the OCR due to

which its directionality had been lost. This resulted in tripping of the ICT on OCR protection.

• On 12-02-2016, some other fault had occurred which tripped the ICT again on OCR protection.


� Earth mat extension contacts (between 440 kV and 220 kV switchyards) were re-connected.

� The failed fuse failure relay was replaced.

� IV side OCR current setting was verified and revised from 0.5 to 1.0 on 12.02.2016.

• Regarding SPS at Hoody, it was informed that though it had been kept disabled previously, with

improvement in ICT loading condition, it has been enabled and is in service now.

Annexure- IV


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4 Tripping of HVDC Talcher-

Kolar pole-1

20-02-2016 at

18:22 Hrs HVDC Talcher-Kolar Pole-1 tripped due to

Valve cooling problem at Kolar end

21-02-2016 at

16:46 Hrs

HVDC Talcher-Kolar Pole-1 tripped due to

Valve cooling problem at Kolar end


• As per TR furnished by PGCIL:

Annexure- IV


PCSC (30-03-2016)

SPS operation details:

• HVDC Talcher-Kolar Pole-1 tripped due to Valve cooling problem at Kolar end at 18:22 Hrs on 20-02-2016.

HVDC pole-2 went into metallic return mode after tripping of HVDC pole-1. SPS signal-1&3 of HVDC Talcher-

Kolar got operated resulting in 1092MW of load shedding in southern region. Detailed Report is awaited

from Kolar.

•

State Load relief during Talcher-Kolar

SPS operation at 18:22 Hrs (MW)

Andhra Pradesh 0

Telangana 0

Karnataka 500

Tamil Nadu 592

Kerala 0

• The flow on HVDC pole-1&2 was 1980 MW prior to tripping of HVDC pole-1. HVDC Pole-2 went into metallic

return mode after tripping of pole-1. Cumulative Power flow on 765 kV Solapur-Raichur lines1&2 went up to

1960 MW (SR import).

• There was reduction in southern region demand after tripping of HVDC pole-1 due to 1092MW load relief

obtained because of SPS operation of HVDC Talcher-Kolar.

• Grid frequency rose from 49.91Hz to 49.95Hz after tripping of HVDC pole-1 due to 1092 MW load shedding

due to operation of Talcher-Kolar SPS.


• As per TR furnished by PGCIL:

Annexure- IV


PCSC (30-03-2016)

Annexure- IV


PCSC (30-03-2016)

SPS Operation details:

• HVDC Talcher-Kolar Pole-1 tripped due to Valve cooling problem at Kolar end at 16:46 Hrs on 21-02-2016.

HVDC pole-2 went into metallic return mode after tripping of HVDC pole-1. SPS signal-1&3 of HVDC Talcher-

Kolar got operated resulting in 1084MW of load shedding in southern region.

•

State Load relief during Talcher-

Kolar SPS operation at 16:46

Hrs (MW)

Andhra Pradesh 300

Telangana 0

Karnataka 450

Tamil Nadu 334

Kerala 0

Total 1084

• There was reduction in southern region demand after tripping of HVDC pole-1 due to 1084 MW load relief




Annexure- IV


PCSC (30-03-2016)

5 Tripping of HVDC Pole – 1

at Gazuwaka 23-02-2016 at

10:13 hrs Failure of Thyristors

As per TR furnished by PGCIL:

SRPC:

• It is pointed out that trippings relating to the three HVDC terminals (Gajuwaka, Kolar, and Bhadrawati) result

from the same causes, namely Gajuwaka � failure of Thyristors and power supply cards Kolar � Valve cooling problems

Bhadrawati � Non-valid tap changing code alarm

• In view of polarization of causes for the trippings at the above three HVDC terminals, PGCIL, instead of

adopting piecemeal approach, should take steps to address them in a comprehensive manner.

Annexure- IV


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6 Tripping of ICT-2 at

Cudappah substation 25-02-2016 at

14:23 hrs

ICT-2 tripped on operation of directional over

current. At the same time B-phase to earth

fault had occurred in 400 kV Cuddapah-Kolar

line

*** ICT-2 and Kadapa-Kolar S/C line are in different dias

400 kV Kadapa – Kolar S/C line: Kadapa (PGCIL-SR1) end:

• As per FIR/EL/TR, the line tripped (in 3-ph) at 14:23:39.370 hrs on B-E fault due to DPR, Z1 operation (6.9 km;

1.8 kA). It was stated that A/R had been kept in non-auto mode for OPGW works vide SRLDC code-686.

• In DR, this time was mentioned at 14:31:25.219 hrs.

• Time sync of DR and EL with GPS needs to be ensured. Kolar (PGCIL-SR2) end:

• As per FIR/DR/EL/TR, the line tripped (in 3-ph) at 14:23:20.684 hrs on B-E fault due to DPR, Z2 (CAT)

operation (176 km; 1.8 kA). It was stated that both Main & Tie Circuit Breakers' A/R had been kept in Non -

auto mode for OPGW works.

• The reason for tripping later was analysed to be an incident of earth-wire snapping and falling over the live

phase between Tower Loc: 28 & 29 while carrying out OPGW stringing works.

• Time sync of Kolar end DR & EL with GPS needs to be ensured.

ICT-2 tripping at Kadapa SS of PGCIL-SR1:

• As per FIR/DR/EL/TR, ICT-2 tripped at 14:23:29.141 hrs due to operation of LV side B/U (high-set) OC and EF

protection

• In DR, this time was mentioned as 14:25:01.665 hrs. Also the instantaneous fault current was observed to

be around 5.3835 A on secondary.

• Time sync of ICT-2’s DR and EL needs to be ensured.

PGCIL (SR-I):

• Prior to tripping event, ICT-1 was under shut down.

• 400 kV Kadapa - Kolar line tripped on B-phase to earth fault. The fault got cleared in Z1.

• Simultaneously, ICT-2 tripped on operation of high set of E/F protection (setting was kept at 4.5 kA).

APTRANSCO:

• High-set of ICT back-up protection should not operate for a through fault. It should be set considering 70% of

transformer winding impedance for the maximum through fault current. SRLDC:

• It is not correct to trip a healthy ICT on back-up protection operation for a through fault that has been

cleared in time.

Recommendations:

PGCIL (SR-I) to revise settings for high-set unit of ICT’s back-up protection at their Kadapa SS such that it will

not operate for a through fault that has been cleared in time.


Talaguppa station 27-02-2016 at

17:33 hrs Tripped on operation of OCR- Y Phase (400KV

SIDE) GI-2

• As per FIR/TR, ICT-3 tripped due to operation of RAPDK make OCR- Y-ph (400 kV side) backup OC protection.



• KPTCL informed that the tripping was due to mal-operation of 400 kV side Y-ph OCR Y-Ph relay (ABB

make; RAPDK), and was replaced with a spare by RT staff on 28.02.16.

Annexure- IV


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Hoody substation 29-02-2016 at

17:43 hrs LV side Breaker Tripped due to problem in

lock out trip circuit contactor GI-1

• As per FIR/TR, ICT-1’s LV (220 kV) side CB tripped due to problem in lock-out trip circuit contactor.

• It was stated that no relays acted as the trip signal was extended directly from Breaker marshalling box to the

trip coils due to problem in lock-out trip circuit.

KPTCL:

• Between Trip and Lock-out conditions of the CB, a Contactor is generally provided to hold the Control Switch

of Trip Coil. However, due to failure of this Contactor’s Coil, Control switch was not able to hold, and a trip

signal was sent.


� The faulty Contactor coil was replaced.

9 Tripping of HVDC Talcher-

Kolar

Pole-1 at 1:29

hrs and Pole-2

at 5:44 hrs on

08-03-2016

Pole-1 Tripped after receiving ESOF from

Talcher end. Pole-2 tripped on operation of

Bridge Differential Protection Delta winding

Stage-2 of convertor transformer

SLD:

• The single line diagram of Kolar (HVDC & HVAC) as provided by PGCIL (SR-II) is attached at the end. Tripping of Pole-1 at 01:29 hrs:

• As per TR of PGCIL:

Annexure- IV


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� SPS operation details:


Kolar SPS operation at 01:29

Hrs (MW)

Andhra Pradesh 410

Telangana 0

Karnataka 600

Tamil Nadu 405

Kerala 163

Total 1578

• The flow on HVDC pole-1&2 was 1980 MW prior to tripping of HVDC pole-1. HVDC Pole-2 went into metallic

return mode after tripping of pole-1. Cumulative Power flow on 765 kV Solapur-Raichur lines-1&2 went up to

1760 MW

(SR Import).



• Grid frequency rose from 49.98Hz to 50.1Hz after tripping of HVDC pole-1 due to 1578MW load shedding

due to operation of Talcher-Kolar SPS.`

• Finally, Talcher-Kolar HVDC pole-1 was restored at 02:12 hrs on 08-03-2016

Tripping of Pole-2 at 5:44 hrs:

• As per TR of PGCIL:

Annexure- IV


PCSC (30-03-2016)

• SPS operation details: � SPS of HVDC Talcher-Kolar got operated resulting in 1290MW of load shedding in southern region.


Kolar SPS operation at

05:44 Hrs (MW)

Andhra Pradesh 329

Telangana 0

Karnataka 600

Tamil Nadu 361

Kerala 0

Total 1290

• The flow on HVDC pole-1&2 was 2070 MW prior to tripping of HVDC pole-2. HVDC Pole-1 went into ground

return mode after tripping of pole-2. Cumulative Power flow on 765 kV Solapur-Raichur lines1&2 went up to

1960 MW (SR Import).





SRPC/SRLDC:

• Operation of Stage-II Bridge differential protection of Converter Transformer for a line fault (Pole fault) is not

in order. PGCIL (SR-II) shall furnish a detailed report bringing out the reasons and the remedial actions taken.

Recommendations:

PGCIL (SR-II) to furnish a detailed report on the tripping of Pole-2 at 5:44 hrs on 08.03.2016 bringing out the

reasons and the remedial actions taken. If the issue has been referred to its OEM, measures and course of

action suggested by OEM shall also be included in the report.

Annexure- IV


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10

Tripping of 400kV

Jeypore-Gazuwaka line-

1&2 and HVDC Gajuwaka

pole-1&2

10-03-2016at

12:31 Hrs

Disturbance in South Odisha system GI-2

400 kV Jeypore-Gajuwaka line-1: Gajuwaka (PGCIL-SR1) end:

• As per FIR/DR/EL/TR, the line tripped at 12:31:07.032 hrs due to DT receipt from Jeypore end. It was stated

that OVR, Stage-I protection acted at Jeypore end.

• It was learnt that all lines connected to Jeypore station had tripped due to disturbance in South Odisha and

Jeypore station became dead. 400 kV Jeypore-Gajuwaka line-2: Gajuwaka (PGCIL-SR1) end:

• As per FIR/DR/EL/TR, the line tripped at 12:31:07.143 hrs due to DT receipt from Jeypore end. It was stated

that OVR protection acted at Jeypore end.

• It was learnt that all lines connected to Jeypore station had tripped due to disturbance in South Odisha and

Jeypore station became dead.

Tripping of Pole-1:

• As per FIR/EL/TR, Pole-1 was blocked at 12:31:07.407 hrs due to loss of East Bus Voltage. It was stated that

DR was not triggered.

Tripping of Pole-2:

• As per FIR/DR/EL/TR, Pole-2 was blocked at 12:31:09.217 hrs due to “Low DC Voltage Trip”.

• SPS operation details:

�

State Load relief during

Raichur-Sholapur

SPS operation at

12:31 Hrs (MW)

Andhra Pradesh 160

Telangana 0

Karnataka 100

Tamil Nadu 81

Kerala 0

Total 341

• The flow on 400kV Jepore-Gajuwaka-1&2 was 700 MW prior to tripping. Cumulative Power flow on 765 kV

Solapur-Raichur lines1&2 went beyond 2500MW (SR import).

• Grid frequency rose from 50.01Hz to 50.08Hz after tripping of 400kV Jepore-Gajuwaka-1&2 due to 341MW

load shedding on operation of Raichur-Sholapur SPS.

• Restoration

Transmission Element Restoration time

400kV Jeypore-Gajuwaka-1 13:28

400kV Jeypore-Gajuwaka-2 14:17

Gajuwaka pole-1 13:35

Gajuwaka pole-2 13:45

Annexure- IV


PCSC (30-03-2016)

3. Details of trippings due to Auto-Reclosure non-operation

Sl.

No. Details of Event Date & Time Reason

Category

1

Tripping of 400kV

Vijayawada-Nellore line-2

01-02-2016 at

6:30 hrs

Line tripped on a Y-phase to earth fault. Line

auto-reclosed at Vijayawada end, but failed to

auto-reclose at Nellore end

GI-2

Vijayawada (PGCIL-SR1) end:

• As per FIR/DR/TR, the line tripped at 06:21:28.164 hrs on Y-E fault due to A/R (Z1) operation, and successfully

auto-reclosed after 1 sec.

• DR does not indicate Main-CB and Tie-CB position Status.

• EL furnished shows only Tie-CB A/R operation from 06:22:47.215 hrs to 06:22:48.207 hrs. Main-CB A/R

events were not shown.

• Time sync of EL and DR with GPS needs to be ensured. Nellore-PG (PGCIL-SR1) end:

• As per FIR/DR/TR, the line tripped (in 3-ph) at 06:20:24.230 hrs on Y-E fault due to Main-1 protection trip.

• As per EL, this event occurred at 06:22:24.200 hrs.

• Time sync of EL and DR with GPS needs to be ensured.

PGCIL (SR-II):

• At Nellore end, Breaker had some mechanical problem. Overhauling was done as a remedial measure.

• GPS will be put into service at Nellore-PG, Kadapa, and Gooty substations in another 15 days time.

2

Tripping of 220kV Idukki-

Udumalpet line 03-02-2016 at

11:54 hrs Line tripped on operation of Y phase to earth

fault. Line auto-reclosed at udumalpet end and

did not reclose at idukki end.

GI-1

06-03-2016 at

4:28 hrs B-phase to earth fault occurred in line. auto

reclosed at Udumalpet end and did not reclose

at Idukki end

GI-1

Tripping on 03-02-2016 at 11:54 hrs Udumalpet (TANTRANSCO) end:

• As per FIR/DR/EL/TR, the line tripped at 11:54:12.110 hrs on Y-E fault due to A/R (Z1) operation, and

successfully auto-reclosed after 650 msec. Idukki (KSEB) end:

• As per FIR/DR/EL/TR, the line tripped at 11:54:15.710 hrs on Y-E fault due to DPR, Z2 operation.

• Time sync of DR and EL with GPS needs to be ensured.


� It was stated in TR that the IDUD feeder tripped on zone 1 at Udumal pet end and carrier was sent from

that end. But the carrier was not received at Idukki end due to the problems with wiring to the relay.

Therefore, the relay at Moolamattom (Idukki) end tripped in Zone 2. This happened when wiring

modifications were made for new numerical relay in place of old L3WYAS electro mechanical relay. The

rectification work is pending and will be resolved as early as possible.

Tripping on 06-03-2016 at 4:28 hrs Udumalpet (TANTRANSCO) end:

• As per FIR/DR/EL/TR, the line tripped at 04:28:28.210 hrs on B-E fault due to A/R (Z1) operation, and

successfully auto-reclosed after 650 msec.

Idukki (KSEB) end:

• As per FIR/DR/EL/TR, the line tripped at 04:28:25.144 hrs on B-E fault due to DPR operation.

• Time sync of DR and EL with GPS needs to be ensured.

• Following was stated in TR:

� In Micom P442 relay, Zone2 picked up on B-E fault and carrier was received and trip command was issued

to B phase pole.

Annexure- IV


PCSC (30-03-2016)

� In CGL ZIV relay, Zone2 picked up on B-E fault and carrier was received and trip command was issued to B

phase pole. But within 15ms. trip was issued to other two phases which turned the tripping as 3 phase

lock out trip. Fault current was present only in B phase. KSEB:

• The A/R function was provided through an external A/R (VARM) relay. For this relay, every phase indication is

required for A/R operation. However, as this information was not wired, Main-II relay gave a 3-ph trip.

• As a remedial measure, this VARM relay was kept disabled. SRPC:

• The external A/R relay (VARM) has become obsolete and is without service support from OEM. Hence,

Auto Reclosure Scheme may be implemented by activating internal Auto Reclosure feature of Main-I

(Micom P442) relay. To this, KSEB assured that it would be done.

• It is generally observed that A/R dead time is set at around 600msec in 220 kV lines in Tamilnadu. Unless

there is a specific reason to do so, TANTRANSCO should revise this timing to 1 sec. To this, TANTRANSCO

agreed to look into it, and revert soon.

3 Tripping of 400kV

Hyderabad-Kurnool line 22-02-2016 at

06:48 hrs Line tripped on a R-phase to earth fault and line

did not auto-reclose. GI-2

Hyderabad (PGCIL-SR1) end:

• As per FIR/DR/EL/TR, the line tripped (in 3-ph) at 06:48:23.605 hrs on R-E fault due to Main-2 protection. Kurnool-AP (APTRANSCO) end:

• As per FIR/DR/EL/TR, the line tripped at 06:47:52.343 hrs on R-E fault due to A/R (Z1) operation, and tried to

auto-reclose after 1 sec; but tripped in 3-ph due to persistent fault. PGCIL (SR-I):

• The line tripped at 06:48:14.447 and successfully auto-reclosed at both the ends (DR of Hyderabad

corresponding to this event was furnished). As another fault (R-E) occurred during reclaim time, the line

tripped in 3-ph at 6:48:23.605 hrs. SRPC:

• If what PGCIL (SR-I) says is true, then A/R should not have been attempted from Kurnool-AP end also (for the

said fault occurred during reclaim time of A/R at both ends).

• APTRANSCO is requested to see why A/R operated at Kurnool-AP end even though fault occurred during its

reclaim time.

4

Tripping of 220kV

Chikkodi-Talandage line

25-02-2016 at

17:44 hrs and

26-02-2016 at

19:24 hrs

Line tripped at Talandage end only on both the

days

GI-1

As per FIR furnished by KPTCL:

• When enquired about provision of A/R status on Chikkodi –Talandage line at Chikkodi end, KPTCL informed

that A/R had been commissioned, and would be put into service during next shut down.

Annexure- IV


PCSC (30-03-2016)

4. Details of trippings due to PLCC mal-operation

Sl.

No.

Details of Event Date & Time Reason Category

1 Tripping of 400kV Guttur-

Narendra-PG line-2

01-02-2016 at

12:06 hrs Line got tripped at Guttur end only

GI-2

Guttur (KPTCL) end:

• As per FIR, line tripped 12:30 hrs on carrier receipt.


Narendra-PG (PGCIL-SR1) end:

• As per FIR, line kept holding from Narendra end.


� KPTCL informed that the line tripped at Guttur end only due to manual error while testing the PLCC cabinets.

2 400kV Vemagiri-GVK (JPD)

line-1

07-02-2016 at

21:20hrs

line tripped at Vemagiri end only on receipt of

Direct Trip signal from GVK

GI-2

Vemagiri (APTRANSCO) end:

• As per FIR, the line tripped at 21:20 hrs due to DT receipt from GVK end.



� APTRANSCO informed that the line tripped due to mal-operation of the relay. The relay was tested and found to be

OK.

GVK end:

• No tripping files (FIR/DR/EL/TR) furnished.

SRPC:

• Since it is not known whether IPP’s are aware of the obligation of furnishing tripping files to SRLDC as per IEGC 5.2 (r),

SRLDC may kindly arrange to provide User Id and Password to all IPP’s in SR, so that they may directly upload various

tripping files in SRLDC web portal in cases of trippings involving their stations.

3 Tripping of 400kV Vemagiri-

GMR line-2

09-02-2016at

12:57 hrs

tripped at GMR end only and line is in service from

Vemagiri

GI-2

Vemagiri-AP (APTRANSCO) end:

• As per FIR, the line tripped at 12:57 hrs from GMR end only, and was kept holding from Vemagiri end.


� APTRANSCO informed that the line tripped at GMR end only.

GMR end:


SRPC:

• Since it is not known whether IPP’s are aware of the obligation of furnishing tripping files to SRLDC as per IEGC 5.2 (r),

SRLDC may kindly arrange to provide User Id and Password to all IPP’s in SR, so that they may directly upload various

tripping files in SRLDC web portal in cases of trippings involving their stations.

Recommendations:

GMR to furnish a detailed report on the tripping event along with remedial measures taken to PCSC forum.

4 Tripping of 765kV Solapur-

Raichur line-1

10-02-2016at

12:45 hrs Line tripped on direct trip receive from Solapur end GI-2

Raichur (PGCIL-SR1) end:

• As per FIR/DR/EL/TR, the line tripped at 12:45:32.984 hrs due to DT receipt from Solapur end,

Solapur (PGCIL-WR1) end:


Annexure- IV


PCSC (30-03-2016)

PGCIL (SR-I):

• As per the information available from Solapur end, DT was sent from Solapur end due to some DC earth leakage.

5 Tripping of 400kV Hassan-

Nelamangala line

07-03-2016 at

14:55 hrs

Line tripped on operation of B-phase to earth fault.

Hassan end sensed the fault in Zone-2 and breaker

tripped after zone-2 time. PLCC carrier signal not

sent from Nelamangala

GI-2

Hassan (PGCIL-SR2) end:

• As per FIR/DR/EL/TR, the line tripped at 14:55:51.743 hrs on B-E fault due to due to DPR, Z2 operation.

• It was stated that A/R failed because of failure of carrier receìpt from the Nelamangala end.

Nelamangala (KPTCL) end:

• As per FIR/DR, the line tripped at 14:55 hrs on B-E fault due to DPR, Z1 operation.

• From DR, the line appeared to have been tripped at 14:55:51.375 hrs on B-E fault due to due to A/R (Z1) operation,

and auto-reclosed after 1 sec; but tripped in 3-ph due to persistent fault. (Signals were shown from last 100 msec. of

A/R dead time only).

• In EL, Carrier Send event was observed at 14:55:51.196 hrs.

KPTCL:

• Carrier was sent from Nelamangala end, but PLCC panel Counter increment did not take place. Both the channels were

tested and found to be OK.


� KPTCL informed that the reason for carrier failure is being investigated. End to end PLCC testing would be done in

coordination with PGCIL.

*****

Annexure- IV


PCSC (30-03-2016)

Single Line Diagram of 230 kV Tiruvalam SS of TANTRANSCO

Annexure- IV


PCSC (30-03-2016)

Single Line Diagram of 220 kV Yerraguntla SS of APTRANSCO

Annexure- IV


PCSC (30-03-2016)

Single Line Diagram of 220 kV Regulapadu SS of APTRANSCO

Annexure- IV


PCSC (30-03-2016)

Single Line Diagram of 220 kV Shimoga MRS SS of KPTCL (Ref: I.3)

Annexure- IV


PCSC (30-03-2016)

Single Line Diagram of NTPL Switchyard (Ref: I.8)

Annexure- IV


PCSC (30-03-2016)

Single Line Diagram of CEPL Switchyard (Ref: I.8)

Annexure- IV


PCSC (30-03-2016)

Single Line Diagram of Kolar (HVDC & HVAC) Station of PGCIL (SR-II) (Ref: II.9)

Annexure- IV

Meet

ing

No /

Index

Details of

Event

Date Reason PCSC Recommendations Utility

Responsible

for

implementa

tion

Status of Recommendations

as on 15-04-2016

Remarks

49/II/1

3

Tripping of

running Units 1

& 3 at

Rayalaseema

TPS of

APGENCO

31-10-2015

at 03:30 hrs

While synchronizing Unit-5 with grid, Bus bar

protection of 220kV Bus-1 operated which

resulted in de-energization of 220kV Bus-1.

This resulted in tripping of running Unit-

1&Unit-3, 220kV lines Pulivedula-1,

Yeralaguntla-1, Chinakampalli-1, Timmapura

In view of the availability of 25AX, APGENCO shall keep

synchronizing facility in auto-mode after getting it’s

operation verified by its OEM, M/s BHEL.

APGENCO Yet to be informed Pending

49/III/

4

Tripping of

400kV

Krishnapatnam-

Chittoor line-1

19-10-2015

at 07:49 hrs

R-phase to earth fault had occurred in line.

Chittoor end tried for auto-reclose. However,

due to persistent fault, breaker at Chittoor end

tripped. Krishnapatnam end relay did not try

for auto-reclose and gave a 3 phase trip as

observed from D.R

• APGENCO to make A/R functional on all lines emanating

from Krishnapatnam TPS by 10th December, 2015.


PendingAPTRANSCO mail received on 24-02-2016:

220KV chittoor substation is a old 220KV substation with single bus operation.

Bus bar protection has both main & checkzone are in service.

APTRANSC

O

1.APTRANSCO to furnish SLD of 220/132 kV Chittoor

SS,

2. APTRANSCO to confirm whether 220 kV side is on

single-bus operation with only one main-zone. If so,

APTRANSCO shall examine the feasibility of providing

split-bus operation or multiple main-zones for bus bar

protection, and take necessary steps to implement it.

Pending Implementation of PCSC Recommendations (30th to 52nd)

Andhra Pradesh42/II/3 Outage at

Regulapadu

station of

APTRANSCO

21-02-2015

at

00:49 hrs

Y-Ph Metering PT failed at 220KV

Ragulapadu Substation. Fault got cleared

by tripping of lines from remote ends.

APTRANSCO to furnish the remedial measures taken in

consequent to the tripping

incident along with the status of bus bar protection and bus

coupler at Regulapadu S/s.

A/R feature to be enabled on Regulapadu – Alipuira 220

kV inter-state line.

APTRANSC

O

Mail recieved on 22-08-2015:

APTRANSCOhas planned to commission ABB make ETL-41 type PLCC

terminal along with NSD-50 type protection coupler at Ragulapadu end towards

Alipura. vide our Ltr Dt 23-07-2015, it is requested KPTCL to arrange ABB

make ETL-41 cabinet with NSD-50 type protection coupler for establishing PLC

communication between Alipura- Ragulapadu.

KPTCL Mail recieved on 23-01-2016:

KPTCL is ready with ETL-41 cabinet with NSD-50 type protection coupler at

Alipur end.

APTRANSCO mail received on 24-02-2016:

Protection coupler equipment is ready at Ragulapadu end. Wave trap errection is

pending at Ragulapadu end. To maintain the ground clearenace structural

modification works are going on for errection of wave trap.

Pending

During testing of DC earth leakage, DC got

extended to bus bar protection relay. Hence bus

bar protection operated and tripped the 220KV

BUS connected transformers and feeders.

18-11-2015

at 11:20 hrs

Tripping of

220kV

Chittoor-

Tiruvalam

50/II/1

4

Annexure- V

1

52/II/1 Tripping of

400 kV

Chittoor-

Sriperambadur

line

01-02-2016

at 9:55 hrs

line tripped on operation of line reactor

protection at Sriperambadur end and direct trip

was sent to Chitoor. Buchholz relay of line

reactor of 400kV Chitoor-Sriperambadur got

operated at Sriperabadur end.

APTRANCO to take steps to ensure that DR and EL are

configured for recording DT receipt event at their

220 kV Chittoor substation.

APTRANSC

O

Yet to be informed Pending

52/I/5

(GD)

Complete

outage of

220kV

Regulapadu

substation of

APTRANSCO

02.03.2016 at

14:32 hrs

220KV R-ph Metering PT failed at 220KV

Regulapadu Substation.

APTRANSCO to furnish the Equipment Failure Report for

the R-ph CT blast to Power System Engg &

Technolgy Divison (PSETD) of Central Electricity Authority

with a copy marked to SRPC.

APTRANSC

O


44/III/

2

Tripping of

400kV

Ghanapur-

Mamidapalli

line

15-04-2015

at 2:03 hrs

Line tripped at Mamidapalli end only and was

holding at Ghanapur. Overvoltage protection

had operated at Mamidapalli

TSTRANSCO to make DR

functional at Mamidipalli

TSTRANSCO TSTRANSCO informed vide their mail dated 24.06.15 that the existing relays

would be replaced with numerical relays in DPR works.

Pending

48/II/5 Tripping of

400kV

Nagarjunsagar-

Mahboobnagar

line

07-09-2015

at 2:58 hrs

Line tripped on operation of over-voltage

protection at Mahboobnagar and direct trip

received at N’sagar station. DT receive was

observed in DR and EL of N’sagar station.

D.R/EL of Mahboobnagar was not furnished to

validate the overvoltage tripping

TSTRANSCO to furnish a detailed report on the tripping

event along with remedial measures taken to PCSC forum.

TSTRANSCO Yet to be informed Pending

48/III/

4

Tripping of

220kV Gajwel-

Shankarapally

line

20-09-2015

at 2:24 hrs

line tripped at Gajwel end on R-Phase to

ground fault. Reason for non-auto reclose

could be established as DR and EL of both

ends were not furnished

• TSTRANSCO to furnish a detailed report on the tripping

event along with remedial measures taken to PCSC forum.


Telangana

47/II/6 Tripping of

400kV

Khammam-

KTPS line-2

30-07-2015

at 6:08 hrs

Y-phase to earth fault had occurred in line.

From Khammam end DR it was

observed that the relay after dead time tried for

auto-reclose. The fault was

persisting and relay gave a single phase trip

instead of a 3 phase trip after 1.25sec. R& B

pole voltage dip after 2 sec

possibly due to operation of pole discrepancy.

Auto-reclose close command observed after

2.5 seconds and all poles got closed.

1. TSGENCO to check the reclaim time of A/R and set it at

25 sec at KTPS.

2. TSGENCO to carry out PLCC end-to-end testing in

coordination with PGCIL (SR-I) for KTPS – Khammam

line-2; retrofitting of Protection Coupler may be carried out

based on the test results.

TSGENCO Yet to be informed Pending

52/I/2

(GD)

Complete

outage of

220kV

Yerraguntla

substation and

tripping of

running Units

at Rayalaseema

TPS

21-02-2016

at 10:39 hrs

HV B-Ph Current transformer of 100MVA

Power Transformer -1 failed resulting into a

bus fault on 220KV Bus-1. Unit-1 and Unit-5

at RYTPS tripped during the fault at

Yerraguntla substation

1. APGENCO to check associated logic for lube oil pump

for correct operation under transient low voltage conditions

at Rayalaseema TPS, Unit-1.

2. APGENCO to keep appropriate time delay/ fault ride

through delay (typically 2 sec) in VFD speed sensor relay at

all its generating Units including Rayalaseema TPS Units.


Annexure- V

2

51/IV/

1

Tripping of

400kV Gajwel-

Hyderabad

29-12-2015

at 6:11 hrs

and 7:11 hrs

Line tripped at Gajwel end only due to

suspected PLCC mal-operation at Gajwel end

TSTRANSCO to check the integrity of all DR’s and EL’s,

and sort out communication related issues at 400 kV Gajwel

SS.


52/I/6

(GD)

Complete

outage of

220kV

Malyalapalli

station of

TSTRANSCO

10-03-2016at

18:41 Hrs

CT failure occurred in 220kV Ramagundam-

Malyalapalli line-1 at Malyalapalli end. The

CT failure resulted into a Bus fault. All 220kV

lines and transformers at Malyalapalli station

tripped during the incident.

TSTRANSCO to furnish the Equipment Failure Report for

the R-ph CT blast to Power System Engg & Technolgy

Divison (PSETD) of Central Electricity Authority with a

copy marked to SRPC.


Karnataka30/I/A RTPS

Tripping

incidents and

the Spl meeting

held

at RTPS on

13th and 14th

March 2014

Mar-14 Spl meeting held at RTPS on 13th

and 14th

March 2014

The PCSC forum recommended for replacement of

existing electromechanical relays with Numerical relays.

KPCL Mail recieved on 21-10-2015 and 23-11-2015:

1) Replacement of Old electromagnetic relays with Numerical relays has been

completed for RTPS-BTPS line & commissioned on 18.03.2014.

Raichur-PG1 & Raichur-PG2 lines have already retrofitted with numerical

relays.

The retrofitting of electromechanical relays with Numerical version for the

following lines/ICTs have been completed/commissioned as follows:

a) ICT-2 –Commissioned on 01-08-2015

b) ICT-1 ---Commissioned on 08-08-2015

c) Munirabad line--- Commissioned on 16-08-2015.

d) Mehaboobnagar line-- Commissioned on 09-09-2015.

2. Job order placed on 26.06.2015 on M/s Alstom T&D India Ltd. Chennai for

retrofitting of relays for all 220kV lines at RTPS.

3. Retrofit of existing bus bar(CAG-34) with numerical version– Budgetary

offers obtained and is under process.

Pending

Annexure- V

3

38/G

D/3.2

GD-1 at Guttur

Substation of

KPTCL

05-11-2014

at 11:42 hrs

Circuit breaker of 400kV Guttur-Hiriyur

line-1 failed at Guttur end while availing

shutdown for replacement of CVT. The

failure of breaker caused bus fault at Guttur.

KPTCL was requested to expedite the early implementation

of pending recommendations of:

1. Protection Audit (Phase-I & Phase-II)

2. PSAG-4, PSAG-5, and PSAG-8

KPTCL KPTCL mail received on 23-01-2016:

'The following works are attended at 400kV Guttur SS :

1. Replacement of Hiriyur-1 line, Bus Coupler, Tie Bus coupler breakers by new

Alstom make breakers (3 new CBs commissioned) recently.

2. New CVTs provided for 400kV Hiriyur line-1 and commissioned on

21.01.2016

Pending

Mail recieved on 27-05-2015 (KPTCL):

1. KPTCL has taken action to provide bus bar protection to 220kV buses.

2. Over current relay Settings of ICTs to be reviewed by PGCIL.

Mail received on 29-07-2015 (KPTCL):

Initial Tendering stage


Detailed estimate prepared for taking up the work. CEE, Transmission Zone,

Gulbarga will take up necessary procurement and further execution.

Pending

38/G

D/3.1

GD-1 at

Mahalingapura

Substation of

KPTCL

25-10-2014 Fault had occurred in 220kV

Mahalingapura-Narendra line-2. Due to the

failure of relay operation at Mahalingapura,

breakers at remote end tripped which

resulted in bus dead condition.

1. PCSC forum recommended KPTCL to replace the old

static distance protection relays with numerical relays.

2. PCSC forum also requested KPTCL to provide a broken

conductor alarm indication in Control Room.

3. Standing instruction needed to be given to the all

substation personnel for not changing the relay settings

without approval of RT/MRT wing.

KPTCL Mail received on 27-05-2015 (KPTCL) & 29-07-2015:

1.Existing Back up relays will be replaced by numerical type distance

relays.Procurement is in tendering stage. Remaining observations were

attended.


Existing back up relays will be replaced by Main-2 protection. LOI issued M/s

Alstom for taking up the works.Remaining observations were attended.

Pending

34/I/6 400/220 kV

ICT-1 & 2 at

MUNIRABA

D

34/III/

1

400kV

Raichur-BTPS

line

26-06-2014 Transient fault in R-phase.

Line did not auto reclose

A/R at BTPS end to be made operational within one

month

KPCL 1. A/R for 220kV lines enabled already.

2. Shut down of lines availed to commission the auto reclosing schme for 400

kV line at BTPS.


Timer relays have been received at site. A letter has been addressed to M/s

Alstom to complete the work on priority basis.


Commissioning of Autorecloser planned on 14, 15 & 16th of Dec-2015 subject

to availability of LC.

Pending

30/I/A RTPS

Tripping

incidents and

the Spl meeting

held

at RTPS on

13th and 14th

March 2014

Mar-14 Spl meeting held at RTPS on 13th

and 14th

March 2014

The PCSC forum recommended for replacement of

existing electromechanical relays with Numerical relays.

KPCL Mail recieved on 21-10-2015 and 23-11-2015:

1) Replacement of Old electromagnetic relays with Numerical relays has been

completed for RTPS-BTPS line & commissioned on 18.03.2014.

Raichur-PG1 & Raichur-PG2 lines have already retrofitted with numerical

relays.

The retrofitting of electromechanical relays with Numerical version for the

following lines/ICTs have been completed/commissioned as follows:

a) ICT-2 –Commissioned on 01-08-2015

b) ICT-1 ---Commissioned on 08-08-2015

c) Munirabad line--- Commissioned on 16-08-2015.

d) Mehaboobnagar line-- Commissioned on 09-09-2015.

2. Job order placed on 26.06.2015 on M/s Alstom T&D India Ltd. Chennai for

retrofitting of relays for all 220kV lines at RTPS.

3. Retrofit of existing bus bar(CAG-34) with numerical version– Budgetary

offers obtained and is under process.

38/G

D/3.5

GD-1 at Kadra

and Kodasalli

hydro power

station

13-11-2014

at 19:31hrs

A fault had occurred in 220 kV Kadra and

Kodasalli. As A result, de-energization of

220kV bus occurred at Kadra and

Kodasalli.

1. The PCSC forum requested KPCL to speed up the

installation of Numerical Distance Protection relay in

Kadra –Kaiga and Kodasalli –Kaiga.

2. The PCSC forum requested KPCL to submit the

implementation status of PSAG-10 recommendations within

a week’s time.

KPCL Mail recieved on 21-10-2015:

NIT floated on 5.5.15 through e-portal. Bid evaluation completed. LOA's issued

to M/s Schneider Electric Infrastructure Ltd. on 08.10.2015.


LOA's issued to M/s Schneider Electric Infrastructure Ltd. on 08.10.2015.

Engineering work is in progress.

Pending

Pending

16-07-2014 As reported directional over current relay of

ICT’s operated due to snapping of line

jumper in 220kV Lingapur line.

1. Bus bar protection shall be provided by asset owner (

i.e KPTCL).

2. Settings for main distance protection & Overcurrent

protection shall be examined and reviewed.

3. Time synchronization of the Substation shall be

ensured.

4. Correct DR shall be submitted to the SRLDC for trip

analysis.

KPTCL

Annexure- V

4

39/I/5 Tripping of

400/220kV

ICT-2 at

Hoody

substation of

KPTCL

01-12-2014 Suspected mal-operation of 220kV side

Rphase

over current relay

1. PCSC forum recommended KPTCL to replace the relay

with a different make.

2. KPTCL was also requested to train the O&M personnel

adequately before performing any maintenance works to

avoid such unwanted trippings.

KPTCL Mail received on 27-05-2015 & 29-07-2015:

C&R panels of 500MVA ICT 1&2 will be replaced under scheduled R&M

works. O&M personnel are instructed to take sufficient care in order to avoid

unwarrented trippings.

KPTCL mail received on 23-01-2016:

New C&R panels(with numerical relays) erected for 500MVA ICT-1 &2 under

R&M work, which will be commissioned shortly.

Pending

40/IV/

1

220kV Sedam-

Tandur line

20-12-2014

at 22:20 hrs

Line tripped on Yphase to earth fault from both

the ends

KPTCL was requested to explore the possibility of

providing A/R feature to this line and submit the remedial

measures to the PCSC forum.

KPTCL KPTCL mail recieved on 23-01-2016:

Carrier protection is being restored for 220kV Sedam-Tandoor line at Sedam

end. After restoring the carrier protection , AR will be enabled.

Pending

42/I/1

(GD)

Complete

outage of

220kV Sedam

substation of

KPTCL

15-02-2015

at 14:24 hrs

Fault occurred in 220kV Sedam-Shahpur line 1. KPTCL to provide Bus Bar protection and LBB

protection at Sedam S/s and furnish

the status of their implementation to PCSC forum.

2. KPTCL to implement A/R feature on 220 kV Sedam-

Tandur inter-state line.

KPTCL Mail received on 29-07-2015:

1. Procurement of Bus bar and LBB protection is in the final tendering stage.

2. Action is being taken to restore the carrier protection for 220kV Sedam-

Tandoor line. AR will be enabled after restoration of PLCC.

Pending

Mail received on 28-05-2015:

1. Main-2 relays already installed and commissioned.

2. DC fuses are intact. Till date no such incidence occurred.

3. Possibility of DC-1 & DC-2 arrangement and splitting of DC will be

reviewed.

Mail received on 07-07-2015 , 21-10-2015 and 23-11-2015:

1. Completed.

2. Completed.

3. Possibility of DC-1 & DC-2 arrangement and splitting of DC will be

reviewed.

Pending

KPTCL mail received on 23-01-2016:

1. Bus bar protection panels pocured and erected at Sedam. Wiring , testing

,commissioning is being taken up.Planned to complete by April 2016.



Pending41/I/4 Complete

outage at

220kV Sedam

Substation of

KPTCL (GD-

1)

27-01-2015

at 8.00 hrs

R-Phase to ground fault occurred on 220kV

Sedam-Shahpur line. Fault not cleared from

Sedam end due to stuck-breaker condition.

While the Sedam- Sahapur line tripped from

Shahapur end in Zone-1, the other 220 kv lines

from Sedam tripped at remote ends in Zone-2.

This caused complete outage of 220kV Sedam

substation.

1. KPTCL to provide Bus bar and LBB protections for

220 kV bus at Sedam S/s.

2. KPTCL to implement A/R feature on 220 kV Sedam-

Tandur inter-state line.

KPTCL

40/I/1 GD-1 at 220kV

Ambewadi

Station of

KPTCL

22-12-2014

at 21:22 hrs

Triggering incident was B-phase to earth fault

in 220kV Ambewadi- Nagzari line-1. B-pole

of breaker did not open at Ambewadi end.

LBB protection not available at Ambewadi

end. All elements tripped on Zone-2 from

remote ends.

1. Till the completion of R&M works for bus bar and LBB

protection, KPTCL shall explore the possibility of having

split bus operation at Ambewadi and submit the details of

the same to PCSC forum.

2. KPTCL shall provide the details of the tripping of Supa

hydro station connected downstream from 110 kV bus.


Action is being taken by KPTCL for operating Ambewadi in split bus mode.

Problem in bus coupler breaker is attended.Isolator overhaulling work is

completed.PTs are already provided to 220kV Bus-II. After commissioning of

Bus-II PTs, Ambewadi can be operated in split bus mode. Pending works will

be completed within a months time.

KPTCL mail recieved on 23-01-2016:

Bus-II PTs yet to be commissioned.Planned to complete before end of April-

2016.

Pending

41/I/1 GD-1 at 220kV

Kadra power

Station of

KPCL

16-02-2015

at 12:56 hrs

Triggering incident was B-phase to earth fault

had occurred in 220kV Kadra-Kodasalli line.

Line tripped from Kodasalli end only. 220kV

Kaiga-Kadra tripped in Zone-3 from Kaiga

end. Tripping of evacuating lines caused bus

shut down at Kadra hydro station.

1. KPCL to make functional the Main2 (EPAC) relay

with the help of KPTCL at the earliest.

2. KPCL to investigate the reason for DC fuse fail

during transient fault in 220kV Kadra-Kodasalli line

including the testing/ checking of DC supply cables, breaker

control cables, and trip coils.

3. KPCL to ensure supply for Main-1& Main-2

protections, Trip Coils (TC1, TC2) from separate battery

banks.

KPCL

Annexure- V

5

42/I/2

(GD)

Complete

outage of

220kV

Ambewadi

substation of

KPTCL

12-03-2015

at 7:51 hrs

Fault in 220kV Ambewadi-Nagjheri line-2 1. KPTCL shall provide A/R feature on Ambewadi – Ponda

220 kV D/C inter-state line.

2. Till the completion of R&M works for bus bar and LBB

protection, KPTCL shall explore

the possibility of having split bus operation at Ambewadi

and submit the details of the

same to PCSC forum.

KPTCL Mail received on 29-07-2015:

1. Procurement of Bus bar and LBB protection is in the final tendering stage.



Pending

Annexure- V

6

43/II/1

4

Tripping of

400/220kV

ICT-1 at

BTPS

14-01-2015

at 1:09

hrs

ICT tripped due to operation of Over current

and Earth fault relay

KPCL to check the possibility of providing line differential

protection between RTPS and Yermarus stations.

KPCL Mail received on 07-09-2015 , 21-10-2015 and 23-11-2015:

Revised relay settings are awaited from KPTCL.

Revised relay settings furnished by KPTCL will be incorporated in co-ordination

with KPTCL shortly.

Pending

45/III/

12

Tripping of

400kV Raichur-

BTPS line

01-06-2015

at 01:02 hrs

line tripped on R-phase to earth fault. Line did

not auto-reclose

KPCL to make A/R operational on 400 kV RTPS – BTPS

S/C line at both ends.


Completed at RTPS end.

Pending at

BTPS end.

46/II/2

1

Trippings at

220kV Raichur

TPS

07-06-2015

at 01:35 hrs

1. KPCL to check the operation of anti-pumping relay on

220 kV side and keep it in healthy condition.

2. KPCL to provide manual reset to the 220 kV side master

trip relay.

3. KPCL to use both the 220 kV buses as main buses under

normal operation, and should go for single bus operation

only during emergencies.


1) Completed

2) Completed.

3) Two bus operation for 220kV buses : In place of existing CT switching relays,

High speed manual heavy duty change over switch of sufficient current capacity

will be retrofitted to all feeders at 220kV station and same will be operated

manually during changeover of feeder by one bus to the other and this

arrangement may facilitate to put both buses in service. Time required for this

retrofit is around 90days . However, this work will be taken up only after

retrofitting of electromagnetic relays with numerical relays for Main-2 protection

of all 220kV lines, for which work is in progress.

Pending

44/II/3 Tripping of

220kV

Kaiga-

Kodasalli

and 220kV

Kodasalli-

Nagjheri line- 1

22-04-2015

at

20:28 hrs

220kV Kodasalli-Nagjheri line-1 tripped from

Kodasalli end on operation of

distance protection, zone-2.

220kV Kodasalli-Nagjheri line-1&2 is kept

opened from Nagjheri end, hence fault

could not be cleared with carrier aided

protection. Backup earth fault relay at

Kaiga end got operated during the event and

resulted in tripping of 220kV Kaiga-

Kodasalli line from Kaiga end.

1. KPCL to check the possibility of implementing

Permissive Over Reach (POR) with Echo feature at

Kodasally end.

2. If the above is not possible, KPCL shall check the

possibility of keeping the 220kV

Kodasalli-Nagjheri lines OPEN at Kodasalli end and idle-

charged at Nagjheri end, and

implement the same.

KPCL Mail received on 07.07.2015:

The matter had been discussed with KPTCL. KPTCL recommended to keep

Zone-2 time lever to zero. If this is acceptable, then the same shall be

incorporated immediately.

Mail received on 07-09-2015 , 21-10-2015 and 23-11-2015:

The matter has been discussed with KPTCL. KPTCL recommended to keep

Zone-2 time lever to zero.

If this is acceptable to SRLDC, then the same shall be incorporated

immediately.Reply from SRLDC is awaited.

Pending

42/II/2 Tripping of

220kV

Chikodi-

Talandage and

220kV Chikodi-

Mudshingi line

20-02-2015

at

06:40 hrs

Lines tripped during test charging 220kV

Chikodi-Belgaum line-2 from Chikodi

end.

1. KPTCL to provide A/R feature on the 220 kV Chikkodi –

Talandage, and 220 kV Chikkodi –Mudashinge inter-state

lines.

2. KPTCL to carry out E/F relay coordination for Chikkodi -

Talandage and Chikkodi –

Mudashinge lines in coordination with Maharashtra.


1) Replaced existing VXL by ABB make C&R panel for both interstate lines on

21.04.2015. The ABB Engineer visited 220KV Chikodi on 05.11.2015 for

enabling AR system to existing ABB make REL511 relay for both interstate

line, but AR system not enable due to internal cards faulty. Hence action is being

taken to replace the ABB,REL511 distance relays within a months time.

Pending

Annexure- V

7

47/III/

8

Tripping of

220kV

Ambewadi-

Ponda line-2

02-08-2015

at 13:20 hrs

Line tripped on a transient fault in B-phase.

There is no

provision for auto reclose.

47/III/

10

Tripping of

220kV

Ambewadi-

Ponda line-1

08-08-2015

at 10:51

hrs and 09-08-

2015 at

11:15 hrs

Line tripped on a B-phase to earth fault. Line

tripped as there is no provision for auto-reclose

47/III/

12

Tripping of

220kV

Ambewadi-

Ponda line-1

17-08-2015

at 13:20 hrs

Line tripped on a transient fault . There is no

provision for Auto reclose.

PendingYet to be informedKPTCLKPTCL to activate non-directional Over Current protection

with a time delay of 600-800 msec for Fuse

failure condition at Lingasugur.

220kV RTPS-Lingasugur line-2 tripped at

TPS end on operation of distance

protection zone-1. 400/220kV ICT-2 got

tripped on operation of earth fault

protection. 220kV RTPS-Lingasugur line-

1&3 tripped on distance protection

zone-2 and zone-3 respectively. Due to

tripping of ICT-2, the running units got

overloaded and it was mentioned that

under frequency occurred as units are

on load control. The Units got tripped

on under frequency.

06-08-2015

at 4:51 hrs

47/II/1

3

Tripping of

Unit-1&2

along with

400/220kV

ICT-2 at

Raichur TPS

PendingYet to be informedKPTCL KPTCL to revise distance relay settings at Nelamangala

end for 220 kV Nelamangala – Hebbal - Peenya line – 1 for

the effective line length of 17 km. These new settings can be

appropriately reviewed as and when the tie-arrangement at

Hebbal is done away with.

All connected 220kV lines and transformers

were taken on 220kV North bus as South bus

was under shut down for conversion of strung

bus to rigid bus and isolator replacement under

R&M works. Failure of HV side Y phase CT

of 150MVA Transformer-3 occurred at Peenya

Substation which resulted in operation of

Differential and HV REF protection. The

failure of CT also resulted in a 220kV bus fault

in North Bus.

27-09-2015

at 4:23:17 hrs

Complete

outage of

220kV Peenya

Substation in

Karnataka

48/I/2

(GD)

Till A/R is put into service on Ambewadi-Ponda line-1,

KPTCL to reduce Zone-2 time setting to zero sec. at

Ambewadi end.

KPTCL Yet to be informed Pending

Annexure- V

8

48/I/3

(GD)

Outage of

220kV

Ambewadi

station in

Karnataka

30-09-2015

at 10:41 hrs

220kV Ambewadi-Nagjheri line-2 tripped on B-

phase to earth fault. This resulted in loss of

supply to 220kV Ambewadi bus. 220kV

Ambewadi-Ponda line-1&2 were hand tripped

after deenergization of bus at Ambewadi.

KPTCL to fast-track providing A/R on all 220 kV lines

emanating from Ambewadi SS to prevent Station shut-down

on temporary faults.


Will be complied in a months time.

Pending

48/I/4

(GD)

Complete

outage of 220

kV HSR

substation of

Karnataka

06-10-2015

at 16:32 hrs

All connected 220kV lines at 220kV HSR

substation i.e. Somanahalli, EPIP, Hoody and

Nagnathapura tripped during the incident.

Triggering incident was fault in 220kV HSR-

EPIP line

KPTCL to review distance relay settings at Naganathpura

SS in view of LILO arrangement at HSR Lay-out.


ABB make REL 670 type distance relays provided to Somanahalli and hoody

lines. Planned to commission within 10 days.

Pending

49/II/1

5

Trippings at

Raichur TPS

12-11-2015

at 00:30 hrs

Running Unit-4, 5 and Unit-8 and 400kV

RTPS-Yeramaras TPS feeder got tripped due

to de-energization of both 400kV Bus-1&2 at

Raichur TPS

1. KPCL to carry out hot-line washing of RTPS-connected

lines regularly to avoid trippings due to fog and dust.

2. KPCL may see the feasibility of providing breaker

flashover protection at RTPS, and implement the same if

possible.

KPCL Yet to be informed Pending

PendingYet to be informedKPTCL1. KPCL to provide A/R on all 220 kV lines emanating from

Nagjheri PH.

2. KPTCL to provide A/R on all 220 kV lines emanating

from Ambewadi SS.

220kV Nagjheri-Ambewadi line-1 tripped at

13:33 hrs due to B phase to earth fault.

Ambewadi was radially fed from Nagjheri

power station through 220kV Nagjheri-

Ambewadi line-2. Tripping of this line caused

220kV Bus shut down at Ambewadi and

remaining lines and transformers were hand

tripped

49/I/1.

3

(GD)

Complete

outage of

220kV

Ambewadi

Substation of

KPTCL

29.10.2015 at

14:34 hrs

Annexure- V

9

52/I/3

(GD)

Complete

outage of

220kV

Shimoga

substation

22-02-2016

at 15:03 hrs

220kV Bus Bar protection operated during

failure of R phase CT in DVG-2 line bay.

KPTCL to operate 220 kV Shimoga on multi-bus operation

under normal conditions, put it on single-bus operation only

under emergency conditions.

KPTCL Yet to be informed Pending

KPTCL 1. KPTCL to configure all DR’s and EL’s at 400 kV Guttur

SS so that they will also get triggered for BBP operation.

2. KPTCL to ensure time-synchronization of all DR’s and

EL’s with GPS at their 400 kV Guttur SS.

Failure of Lightning Arrestor of Y-phase Line

Reactor of 400kV Guttur-Hiriyur line-1 and

line tripped on distance protection Zone-1. Bus-

bar protection of 400kV Bus-2 at Guttur

substation also got operated during the event

sensing this through fault. 400/220 kV ICT-1

& 2 at Guttur, 400kV Kaiga-Guttur-2, 400kV

Guttur-Narendra-2, 400kV Guttur-Hiriyur-2

and 400kV Guttur-Munirabad which are on

400kV Bus-2 got tripped during the incident.

400kV Guttur-Narendra-1 which was on Bus-1

also tripped at the same time.

Yet to be informed PendingKPCL/

KPTCL

1. To avoid tripping of transmission lines on transient faults,

KPCL/ KPTCL is recommended to carry out periodic

patrolling of lines, and ensure their proper maintenance by

carrying out jungle/ bushing clearance and trimming of tree

branches within the RoW of transmission lines as per the

SRPC transmission line patrolling guidelines (available

under the menu item "All Uploads Operation

Miscellaneous Transmission Line Patrolling Protocol /

Guidelines for Southern Region" on SRPC website).

2. KPCL/ KPTCL to review operation of SPS at NPH for

functionality (reduction of generation with tripping of

evacuating lines) and healthiness.

3. KPCL to put 220 kV Kodasalli - Nagjheri D/C lines into

service if more than 200 MW generation from Kali Complex

(with Nagheri Contribution not less than 50 MW) is ensured

on sustained basis.

220kV lines from Nagjheri power house started

tripping from 11:00 hrs due to fault in lines.

The sequence of tripping is shown in SOE list.

At 12:33 hrs, 220kV Narendra-Ambewadi

lines-1&2 got tripped which resulted in loss of

evacuation path to Nagjheri station resulting in

tripping of running Units and complete outage

at Nagjhheri power station. 220kV Ambewadi

station also got de-energized due to tripping of

source feeders i.e. 220kV Narendra-Ambewadi-

1&2 and 220kV Nagjheri-Ambewadi-1&2.

22-02-2016

at 12:36 hrs

Complete

outage of

220kV

Nagjheri power

station and

220kV

Ambewadi

substation of

KPTCL

51/I/3

(GD)

PendingYet to be informed17-01-2016

at 18:53 hrs

Multiple

tripping at

400kV Guttur

sub-station

51/II/2

1

Annexure- V

10

48/I/1

(GD)

Disturbance in

220kV

Tamilnadu

system

05-09-2015

at 14:04 hrs

Complete outage of 230kV Palladam, 230 kV

Othakalmandapam S/s, 230 kV Coimbatore

S/s, 230 kV Thudialur and 230 kV

Sadayapalayam S/s

TANTRANSCO to take suitable measures like installing

more stub-towers along 230 kV OK Mandapam – Myvady

line to avoid excessive sag due to over-loading.

TANTRANS

CO

TANTRANSCO Mail received on 19-02-2016 and 24-03-2016:

230kV Othakalmandapam - Myvadi feeder will be made LILO at Kongal Nagar.

Line restringing will be carried out along with the above proposal.

Pending

Line-2 tripped on R-phase to earth fault.

Line autoreclosed at SVChatram end and failed

to reclose at Alamathy end. Bphase to earth

fault in line-1. Line tried for A/r but due to

permanent fault line did not reclose. ICT

tripped on operation of over flux protection.

PendingTANTRANSCO vide their mail dated 24.06.15 informed that different relays in

Main-I & Main-II would be ensured at the earliest.

Mail recieved on 24-07-2015 ,19-02-2016 and 24-03-2016:

Different relays in Main-I & Main-II will be ensured.

TANTRANS

CO

TANTRANSCO was requested to swap the relays between

two stations, so that

Main-1 and Main-2 will be of different make at each station.

Tamil Nadu43/II/5 Tripping of

400kV

Alamathy-

SVChatram

line-1&2

and 400/230kV

ICT

at S.V.Chatram

29-03-2015

at

15:29 hrs

Annexure- V

11

50/II/1

7

Tripping of

400/230kV

Myvadi ICT-3

27-11-2015

at 17:26 hrs

400/230kV Myvadi ICT-3 tripped due to the

operation of 230 kV CB LBB protection at 230

KV bus (TNEB) of Myvadi station.

TANTRANSCO to check the LBB scheme for LV-3, and

furnish the remedial measures taken to PCSC forum.

TANTRANS

CO


LBB scheme will be tested while availing Line Clear.

Pending

50/I/3

(GD)

Complete

outage of

230kV

Mywadi station

of

TANTRANSC

O

21-12-2015

at 6:28 hrs

Busbar protection got operated for a fault in

230kV Mywadi-Anaikadavu line

1. TANTRANSCO to examine the feasibility of providing

two main-zone operation for bus bar protection by exploring

various alternatives like replacing existing bus-coupler CB

with a hybrid bus-coupler CB that comes with inbuilt CT,

replacing existing BBP relay with another suitable relay that

supports two main-zone operation, and implement the same.

TANTRANS

CO


Revision of Bus Bar Protection setting was carried out. The stabilizing voltage

setting was raised from 410 to 450 volts. After completing the necessary test, the

bus bar protection put in to service on 29.12.2015.

Pending

49/I/1.

5

(GD)

Complete

outage of

S.P.Koil

station of

TANTRANSC

O and

generation loss

at MAPS

09-11-2015at

09:33 hrs

Fault had occurred in 230kV MAPS-S.P.Koil

feeder-1. LBB protection got operated as

breaker of this feeder was under lockout and

resulted in tripping of 230kV bus at S.P.Koil.

Unit-1&2 at MAPS due to loss of evacuating

feeders i.e. 230kV MAPS-S.P.Koil feeder-1&2

1. TANTRANSCO to ensure correctness of operation of

LBB relays at SP Koil.

2. TANTRANSCO & MAPS to furnish their respective

compliance report of the recommendations of to-be-

conducted PSAG-14 meeting at MAPS, Kalapakkam.

TANTRANS

CO

TANTRANSCO Mail received on 19-02-2016:

LBB scheme will be checked to ensure correctness of operation while availing

Line Clear.

TANTRANSCO and MAPS mail received on 25-01-2016:

Complaince report was submitted with respect to the recommendations given in

the Minutes of PSAG-14 Meeting.

TANTRANSCO mail received on 24-03-2016:

Complaince report was submitted on 25.01.2016 with respect to the

recommendations given in the Minutes of PSAG-14 Meeting.

Pending

PendingTANTRANSCO mail received on 24-03-2016:

CMR relay for extending LBB protection was released and LBB extended from

Distance Protection relay directly. CT is not available in the Bus Coupler bay for

zone segregation. However, during commissioning of third ICT, Bus section

Breaker will be provided for zone segregation. Numerical BBP relay will be

provided.

TANTRANS

CO

1. TANTRANSCO to provide split-bus operation with bus

sectionalizer CB for their 230 kV Madurai (Chekanurani)

SS.

2. TANTRANSCO to provide two main-zone operation for

the numerical BBP that is being commissioned.

3. TANTRANSCO to examine the feasibility of providing

Re-Trip feature for the LBB protection, and accordingly take

steps for implementing the same.

Fault had occurred in 230kV Madurai-

Sembatty line. Trip from distance relay was not

extended to breaker due to protection DC fail.

LBB protection got operated resulting in a

busbar trip at 230kV Madurai substation. All

elements got tripped as there is a single bus

operation at 230kV Madurai S/s

19-01-2016

at 11:56 hrs

Complete

outage of

230kV

Madurai S/s

(Chekanaurani)

of

TANTRANSC

O

51/I/1

(GD)

PendingTANTRANSCO mail received on 24-03-2016:

3Ф Trip at 400kV Alamathy end due to DT received from vallur end for BФ

LAS bursted in Alamathy -Thiruvalam - 1 # at Alamathy end.

TANGEDCO NTECL, Vallur to furnish a report detailing the reasons for

mal-operation of Vallur end relays for a fault on Alamathy-

Tiruvalam line-1, and remedial measures taken to PCSC

forum. In the report, their preparedness for implementing

line differential protection on Vallur-Alamathy lines may

also be indicated.

400kV Vallur-Alamathy Line-2 got tripped

from Vallur end during failure of Y-phase LA

in 400kV Alamathy-Tiruvalam line. Protection

at Vallur end tried for an auto-reclose and gave

a 3 phase trip.

13-12-2015

at 22:42 hrs

Tripping of

400kV

Alamathy-

Tiruvalam line-

1 and 400kV

Alamathy-

Vallur line-2

51/II/4

Annexure- V

12

Kerala44/I/1

(GD)

Complete

outage of

Idukki Hydro

Power Station

(GD-1)

28-04-2015

at 12:30 Hrs

220 kV breaker of unit-3 at Idukki Power

house flashed and bus differential protection

acted. All Generators (6Nos.) along with all

220 kV feeders tripped during the incident.

1. KSEB to reduce sensitivity of REF protection

appropriately at Idukki PH.

2. KSEB to replace/ repair the faulty breaker.

3. KSEB to check the PLCC equipment at New Pallam and

inform the remedial measures taken to PCSC forum.

KSEB Mail recieved on 30-10-2015:

1. Purchase procedures is still in progress.

2. Replaced.

3. PLCC equipment Tested and found OK.


1. Even though repeated plans to have a joint inspection with M/s.ABB who is

the OEM of the relay panel for replacing the relays with numerical ones, the

same could not become successful. Finally, the inspection has been fixed on

15.03.2016. It has been planned to replace existing REF protection with low

impedance ones after retrofitting the numerical ones of OEM.

Pending

(Recomme

ndation

No.1)

Annexure- V

13

42/II/2

3

Tripping of

HVDC

Bhadravathi

Pole-1

18-03-2015

at

13:55 hrs

Pole tripped due to failure of auxiliary supply PGCIL (SR-I) to submit the compliance report on PSAG-11

recommendations to PCSC

forum.

PGCIL Reply received during 46th PCSC meeting:

Tertiary Transformer charged and auxiliary power for HVDC is being availed

from tertiary widings of ICT.

Pending

PendingReply received during 46th PCSC meeting:

Operation is in-order as per OEM manual (ABB HVDC)

PGCILPGCIL (SR-I) to furnish the reasons for Converter

Transformer differential protection

operation for Pole-2 along with the remedial measures taken.

HVDC Pole-1 at Gazuwaka tripped due to

tripping of filter banks and Pole-2 tripped

due to operation of differential protection.

400kV Jeypore-Gazuwaka line-1 tripped

on over-voltage from Gazuwaka end.

14-03-2015

at

17:12 hrs

Tripping of

HVDC pole-

1&2

at Gazuwaka

and

400kV 400kV

Jeypore

Gajuwaka

line -1

42/II/2

2

43/II/2 Multiple

tripping

at 400/230kV

Hosur

substation

of Powergrid

26-03-2015

at 15:40 hrs

230kV Bus-2 at Hosur (PG) got

tripped as spurious initiation got

extended to LBB relay of 230kV

Hosur-Hosur(PG) line at Hosur(PG)

end due to shorting of contacts in

lockout relay. 400/230kV ICT-2, ICT-

3, 230kV Hosur-Vinnamangalam,

230kV Hosur(PG)-Hosur which were

connected to Bus-2 got tripped along

with bus coupler breaker

PGCIL (SR-II) to check the possibility of providing re-trip

feature in LBB relay.

PGCIL Mail received on 02-09-2015:

The scheme was tested thoroughly found normal.

Pending to

check the

possibility

of re-trip

feature

PGCIL34/I/7 HVDC

BHADRAVA

THI POLE 2

18-07-2014 As reported pole-2 tripped due on 5th

harmonic alarm.

1. Complete analysis of the faults and rectification/remedial

action taken to avert similar occurrence in the HVDC Back

to Back station shall be submitted.

2. The PCSC forum recommended PGCIL, SRTS-I take up

the issue with WRTS to submit the report as per IEGC

guidelines.

3. SRLDC is also requested to send a letter to WRLDC to

submit the reports to SR also.

4. Based on the SRTS/SRLDC correspondences, SRPC

would take it up with WR and PGCIL if the issue is not

getting resolved.

PGCIL Reply received during 46th PCSC meeting:

Being pursued with POWERGRID, WR-1

Pending

Yet to be informed Pending42/II/7 Tripping of

400kV

Jeypore-

Gazuwaka line-

1&2 and

tripping of

HVDC back to

back pole-

1&2 at

Gazuwaka

23-02-2015

at

13:34 hrs

HVDC pole-1 got tripped due to failure

of 4 no. power supply card. HVDC

pole-2 tripped on DC low voltage trip.

400kV Jeypore-Gazuwaka line-1&2

tripped due to operation of Over voltage

protection at Gazuwaka end.

PGCIL (SR-II) to submit the report of M/s ABB’s on

preventing supply card failures.

PGCIL

Annexure- V

14

44/I/3

(GD)

765 kV

Raichur-

Sholapur line 1

&

2 tripped

24-05-2015

at 19:19 hrs

Tripped on Overload. 1. PGCIL to provide the status of healthiness of SPS contact

logic in SRLDC’s SCADA.

2. PGCIL to furnish the details of the implemented SPS-7

scheme including logic diagram to PCSC forum.

PGCIL Yet to be informed Pending

44/II/4 Tripping of

400kV

Ramagundam-

Hyderabad line-

3,

400kV

Hyderabad-

Malkaram line-

1 and 400kV

Bus-1

at Hyderabad

23-04-2015

at

15:11 hrs

400kV Ramagundam-Hyderabad line-3 at

ramagundam end only due to DT receive.

400kV Hyderabad-Malkaram line-1

tripped at Hyderbad end only and was

holding from Malkaram end. 400kV Bus-1 at

Hyderabad due to operation of bus

bar protection.

PendingYet to be informedPGCILPGCIL (SR-I) to check healthiness of PLCC panels at

Hyderabad SS, and repair/ replace

them, if necessary.

Annexure- V

15

44/II/6 Multiple

tripping at

Vemagiri

substation of

APTRANSCO

25-04-2015

at 10:04

hrs

400kV Vemagiri-Vijayawada line-1&3, 400kV

Vemagiri-Goutami line-2, 400kV Vemagiri-

Konaseema line-2 and 400/220kV ICT-2 at

Vemagiri tripped

during the incident. Triggering incident

was failure of B-phase L.A in 400kV

Vijayawada-Vemagiri line-1 at Vemagiri.

1. PGCIL (SR-I) to enable Auto reclosure feature at

Vijayawada end.

2. PGCIL (SR-I) to check distance relay settings for

Vijayawada – Vemagiri line 3, and

furnish a compliance report to PCSC forum.


44/II/8 Tripping of

400kV

Gooty-NPS

line-2

26-04-2015

at 13:16

hrs

R-phase to earth fault had occurred in

line. Lines auto-reclosed at gooty end

and later tripped due to DT receive from

NPS end.

PGCIL (SR-I) to coordinate STUB protection settings with

the distance protection time

settings at NPS.


45/II/2

1

Tripping of

400/220kV

ICT-1 at Gooty

Substation

03-06-2015

at 12:30 hrs

ICT tripped due to mal-operation of

differential relay

1. PGCIL to follow IS and CEA regulations while carrying

out maintenance work.

2. PGCIL to furnish a report on what caused the ICT-1

tripping including remedial measures.


46/II/1 Tripping of

400/220kV

ICT-2 at

Nagarjunsagar

Station

16-06-2015

at 18:12 hrs&

19:18 hrs

ICT-2 tripped due to mal-operation of 86B

relay due to suspected DC earth fault.

PGCIL (SR-I) to furnish a detailed report on ICT-2& Bus II

outage at 19.18 hrs on 16.06.2015 along with the remedial

measures taken.


46/II/4 Tripping of

400/220kV

ICT-2 at Gooty

substation

22-06-2015

at 13:06 hrs

At 220kV Gooty Switching Station, 220KV

Gooty Receiving Station feeder line side Y-

Phase jumper connected between line isolator

to boom resulting in a 220kV Bus fault. This

resulted in tripping of ICT-2 and 220kV

feeders connected to 220KV BUS-II.

PGCIL (SR-I) to furnish a detailed report as to what caused

LBB operation at 400 kV Gooty SS along with the remedial

measures taken.


PendingYet to be informedPGCIL1. PGCIL (SR-I) to submit the action taken report on the

measures suggested by their OEM.

2. PGCIL (SR-I) to check for the availability of Chatter

Disable feature in P141 and

configure it appropriately to block operation of REF

protection on DC fluctuations.

REF protection of Line reactor of

Nellore-1&2 and Tiruvalam line-1 maloperated

due to DC earth fault

25-04-2015

at

18:10 hrs

Tripping of

765kV

Kurnool-

Tiruvalam line-

1

and 765kV

Kurnool-

NPS-1

44/II/7

45/II/1

5

Tripping of

765kV Raichur-

Solapur line-

1&2

03-05-2015

at 4:13 hrs

Lines tripped on transient fault. Auto reclose

was un-successful. SR &NEW grid separated

due to tripping of 765kV lines

To avoid tripping of transmission lines on transient faults,

PGCIL is recommended to carry out periodic patrolling of

lines, and ensure their proper maintenance by carrying out

jungle/ bushing clearance and trimming of tree branches

within the RoW of transmission lines as per the SRPC

transmission line patrolling guidelines (available under the

menu item "All Uploads Operation Miscellaneous

Transmission Line Patrolling Protocol / Guidelines for

Southern Region" on SRPC website).


Annexure- V

16

47/II/1

1

Tripping of

HVDC

Bhadrawati

Pole-1

05-08-2015

at 10:53 hrs

Main pump-2 of valve cooling got

tripped during dip in 33kV auxiliary bus

voltage. Valve cooling flow got reduced

due to tripping of pump and resulting in

tripping of pole-1

PGCIL (SR-I) to furnish compliance report on PSAG-11

recommendations without further delay to PCSC

forum.


765 kV

RAICHUR -

SHOLAPUR 1

and 2

04-09-2015

at

19:25 hrs

Sholapur -1 and 2 Feeder got tripped at

Raichur end on operation of over current

protection in Main-1 distance relay and

holding from Solapur end on 04.09.2015 at

19:24:42 Hrs

765 KV

RAICHUR –

KURNOOL 2

04-09-2015

at

19:25 hrs

Kurnool -II Feeder got tripped on B-N fault

and holding from Kurnool end (successfully

auto-reclosed at Kurnool end) subsequently

tripped at other end on operation of Over

Voltage stg-1 protection at Raichur end on

04.09.2015 at 19:24 Hrs

49/II/4 Tripping of

400kV Gooty-

NPS line-1

13-10-2015at

10:15 hrs

Direct Trip was sent to NPS end of line-1

during opening of Main CB of Gooty-NPS line-

2 at Gooty end. This resulted in tripping of line-

1 at NPS and line was holding from Gooty.

Over voltage protection got operated at NPS

end and resulted in tripping of line

1. PGCIL (SR-I) to configure time scale resolution in Event

Logger to msec. at Nelllore PS (NPS) and furnish DR

corresponding to OVR, Stag-I operation at NPS end during

the tripping event.

2. PGCIL (SR-I) to ensure time-sync of DR’s and EL’s with

GPS at Gooty and NPS.


PendingYet to be informedPGCIL

PendingYet to be informedPGCIL1. PGCIL (SR-I) to obtain from PGCIL (WR-l) the reasons

for DT receipt from Sholapur end and furnish thesame along

with the remedial measures taken to PCSC forum.

2. PGClL (SR-I) to verify the logic implemented of SPS-1

and SPS-7 for the 76S kV Raichur - Sholapur link

byavailing the line shutdown at the earliest opportune time.

3. PGCIL (SR-I) to furnishthe details of the implemented

SPS-1 and SPS-7 schemes including their logicdiagrams to

PCSC forum.

1. PGCIL (SR-I) to furnish a report detailing the sequence of

events including the remedial measures taken to PCSC

forum.

2. PGCIL (SR-I) to verify and ensure time-synchronizationof

DR& EL with GPS at both Gooty and NPS.

3. PGCIL (SR-I) to check and resolve,in co-ordination with

APTRANSCO, the professed Phase-Discrepancy that is

found to be occurring between 400 kV Gooty (PG) SS and

the surrounding 220 kV network of APTRANSCO in the

event of a fault.

Breaker at NPS end tripped on Direct Trip

receipt from NPS end. After 4 seconds, over

voltage protection operated at NPS end as

observed from EL, and direct trip was sent to

Gooty.

01-07-2015

at 09:59 hrs

Tripping of

400kV Gooty-

NPS line-1

46/II/1

3

28-07-2015

at 11.52.22

hrs.

Separation of

SR-grid and

NEW-grid

46/II/2

2

47/II/1

8

1. PGCIL (SR-I) to check the A/R scheme implemented

through BCU’s at all its GIS/ SAS substations for correct

operation.

2. PGCIL (SR-I) to ensure time-synchronization of DR &

EL of 765 kV Kurnool SS with GPS.

3. PGCIL (SR-I) to sort out the LEGEND ISSUE related to

tripping of the lines in the Event Logger of Raichur.

4. PGCIL (SR-I) to check & ensure the functionality &

healthiness of synchronization facility at Raichur end at the

earliest opportune time.


Annexure- V

17

51/II/2

2

Tripping of

400/220kV

ICT-1 at

Munirabad

18-01-2016

at 12:46 hrs

ICT-1 tripped during operation of tie bay

breaker

1. PGCIL (SR-I) to configure Event Logger (s) at

Munirabad to record event at msec level.

2. PGCIL (SR-I) to set right Time and Field Time values

being shown in EL to proper values.


51/III/

1

Tripping of

400kV

Vijayawada-

Nellore line-2

31-12-2015

at 12:02 hrs

Line tripped on Y phase to earth fault. Attempt

for auto-reclose / Un-successful auto-reclose

could not be established from the furnished

DR/ EL.

PGCIL (SR-I) to furnish a report bringing out the reasons

for non-operation of A/R during the tripping event, along

with remedial taken, to PCSC forum.


51/III/

2

Tripping of

400kV

Vijayawada-

Gajuwaka line-

1

05-01-2016

at 04:18 hrs

line tripped on a R-phase to earth fault. Line

auto-reclosed at Gajuwaka end and tripped

from Vijayawada end.

PGCIL (SR-I) to furnish a report bringing out the reasons

for non-operation of A/R during the tripping event, along

with remedial taken, to PCSC forum.


52/II/6 Tripping of

ICT-2 at

Cudappah

substation

25-02-2016

at 14:23 hrs

ICT-2 tripped on operation of directional over

current. At the same time B-phase to earth fault

had occurred in 400 kV Cuddapah-Kolar line

PGCIL (SR-I) to revise settings for high-set unit of ICT’s

back-up protection at their Kadapa SS such that it will not

operate for a through fault that has been cleared in time.


52/II/9 Tripping of

HVDC Talcher-

Kolar

Pole-1 at

1:29 hrs and

Pole-2 at

5:44 hrs on

08-03-2016

Pole-1 Tripped after receiving ESOF from

Talcher end. Pole-2 tripped on operation of

Bridge Differential Protection Delta winding

Stage-2 of convertor transformer

PGCIL (SR-II) to furnish a detailed report on the tripping of

Pole-2 at 5:44 hrs on 08.03.2016 bringing out the reasons

and the remedial actions taken. If the issue has been referred

to its OEM, measures and course of action suggested by

OEM shall also be included in the report.


41/II/1

2

Tripping of

400KV Coastal-

NTPL line

13-02-2015

at 22:54 hrs

Line tripped B-phase to earth fault and later

tripped on R-Y phase fault. From Coastal end

D.R, Y & B poles of breaker opened first and

R-pole appears to be opened on Pole

discrepancy.

CEPL to check A/R scheme at their end. CEPL Yet to be informed Pending

50/I/2

(GD)

Complete

outage of

TPCIL power

station

30-12-2015

at 06:02hrs

Running units at Thermal Powertech power

Station tripped due to tripping of 400kV

Nellore pooling station (NPS)-TPCIL line and

400kV Nellore pooling station (NPS)-ECC line

1.PGCIL (SR-I) to furnish Action Taken Report on the

findings of OEM on relay mal-operation at NPS end on 400

kV NPS – NCCK line to PCSC forum.

2. PGCIL (SR-I) to appropriately configure Station Event

Logger at NPS to record events at msec interval.

3. PGCIL (SR-I) to carry out PLCC end-to-end testing in

coordination with TPCIL for 400 kV NPS –TPCIL line.

4.PGCIL (SR-I), MEPL, SEL, TPCIL & NCC to take steps

to provide line differential protection at their respective ends

on all 400 kV lines (except Gooty line) emanating from

Nellore Pooling Station, and furnish an action plan to

implement the same.


Others

Annexure- V

18

41/IV/

2

400kV

Tuticorin PS-

NTPL line

09-02-2015

at 03:17 hrs

Y-phase to earth fault had occurred in line.

Line auto reclosed at Tuticorin PS end and

failed to reclose at NTPL end.

NTPL to check A/R scheme at their end. NTPL Yet to be informed Pending

44/III/

4

Tripping of

400kV

Coastal

(CEPL)-

Tuticorin

pooling

station

20-04-2015

at 12:35 hrs

Line tripped at Coastal energen end only and

was holding from TTRNPS

CEPL to furnish a detailed report on this trip event to PCSC

forum.

CEPL Yet to be informed Pending

46/II/3 Tripping of

400kV

Ramagundam-

Dichipalli line

21-06-2015

at 03:27 hrs

Line tripped on operation of overvoltage

protection at Ramagundam end and direct trip

was received at Dichipalli. Over-voltage

operation could not be established with D.R &

E.L submitted by Ramagundam station.

1. NTPC, Ramagundam to investigate the reasons for Over

Voltage alongside checking the drop off- to- pick-up ratio of

the OV relay.

2. The tripping is not as per the grading adopted for

Overvoltage, Stage-I protection (Grading is C2: 110% and 6

sec time delay) at Ramagundam. NTPC, Ramagundam to

check up the same.

NTPC Yet to be informed Pending

47/III/

2

Tripping of

400kV

Vemagiri –

GVK (JPD)

line-2

16-07-2015

at 17:02 hrs

R-phase to earth fault had occurred in line.

Line auto reclosed at Vemagiri end and failed

to reclose at GVK end.

GVK to put A/R into service at GVK Jegurupadu end on

400 kV GVK (Jegurupadu) – Vemagiri line-2.

GVK Yet to be informed Pending

51/II/7 Tripping of

400 kV

Vemagiri-

Gauthami-2

26-12-2015

at 00:01 hrs

Line tripped on operation of over voltage

protection at Gauthami end and direct trip was

received at Vemagiri. FIR, DR and EL of

Gouthami end was not available to validate the

over voltage tripping.

1. GVK Gautami to adjust drop-off to pick-up ratio to >

98% for the Over Voltage relays at Gautami end on 400 kV

Gautami – Vemagiri lines.

2. GVK Gautami to ensure time-sync of all DR’s & EL’s at

Gautami Station with GPS

GVK

Gautami


PendingMail received on 17-03-2016:

Setting has been adopted for Directional Earth fault protection of both thee lines

based on negative sequence polarization algorithm to take for similar high

resistive fault in future.

The Main-1 and Main-2 relays are of AREVA make , Micom P442 and P437

which are of separate platform 40 and 30 platform respectively, though of the

same make which is as per requirement. They are being used by all utilities as

Main-1 and Main-2. (At present they are manufactured and handled by two

different companies (1) GE-ALSTOM and (2) Schneider. Insite of above facts

we are planning to replace Micom P437 relays.

New GPS system has been procured and commissioned on 20/02/16. All IEDs

and SCADA are time synchronised now.

UPCL 1. UPCL to provide different make relays for Main-1 &

Main-2 at UPCL end on 400 kV UPCL – Hassan lines – 1 &

2.

2. UPCL to make GPS functional at their Station and ensure

time-sync of various DR’s and EL’s with GPS.

400kV Hassan-Udupi line-2 tripped on

Directional earth fault protection with Y-E

fault and direct trip was sent to Udupi end.

Directional Earth fault feature of Main-2 relay

at Hassan gave 3-ph trip after 2.6 seconds and

fault current in Y-phase was 1.1 kA. The

distance as well as DEF protection for 400kV

UPCL-Hassan line-2 at UPCL end did not

sense the fault. The generator transformer

backup earth fault protection (51N) had sensed

the fault and tripped both the running units at

UPCL leading to generation loss at UPCL

power station. Back up directional earth fault

protection at 220kV side of 400/220kV ICT’s

at UPCL did not sense the high resistance fault

in line-2

30-11-2015

at 17:22 hrs

Tripping of

400kV UPCL-

Hassan line-2

and running

Units-1&2 at

Udupi power

station

50/II/1

8

Annexure- V

19

52/I/9

(GD)

Complete

outage of

400kV NTPL

station

15-03-2016

at 03:39 hrs

Running Units at NTPL power station got

tripped due to tripping of evacuating lines.

NTPL to furnish compliance report of the recommendations

given by PSAG-15 Committee that held its meeting on 12-

13 April, 2016 at NTPL, Tuticorin.

NTPL Yet to be informed Pending

52/IV/

3

Tripping of

400kV

Vemagiri-

GMR line-2

09-02-2016

at 12:57 hrs

tripped at GMR end only and line is in service

from Vemagiri

GMR to furnish a detailed report on the tripping event along

with remedial measures taken to PCSC forum.

GMR Yet to be informed Pending

Annexure- V

20

36/II/8 400kV

Raichur-

Munirabad line

07-09-2014 B-phase to earth fault had occurred in line.

Line auto reclosed at Munirabad end and failed

to reclose at Raichur end.

KPTCL:

PD (pole discrepancy) time delay would be changed.

PGCIL /

KPTCL


38/II/5 400kV

Ramagundam-

Hyderabad line-

4

27-10-2014 Line tripped on Bphase

to earth fault.

Line did not auto

reclose at Hyderabad

end due to

PLCCmal-operation.

Planned to replace the PLCC system within a week's time at

both the ends during the shutdown.

NTPC/

PGCIL

Yet to be informed. Pending

40/II/3 Tripping of

400

kV

TALAGUPPA

– HASSAN

line

01-01-2015

at

13:38 hrs

On account of R-phase to earth fault, line

tripped at Hassan end due to operation of

distance Zone-2 and non-receipt of

carrier. From D.R of Talaguppa end it is

observed that fault had occurred in Yphase.

1. PGCIL and KPTCL to ascertain the reason for the

phase discrepancy in the relay operation and take suitable

remedial measures.

2. KPTCL to check the PLCC operation at Talaguppa

end and submit the report to the PCSC forum.

PGCIL/

KPTCL

Mail received on 27-05-2015 (KPTCL) & 29-07-2015:

End to end testing of PLCC has been done and problem in the PLCC is

atttended. Phase discripancy in the relay operation is to be checked jointly.


Problem is in identification of phases at Talguppa end. To be rectified by M/s

KPTCL.

Pending

42/II/1 Tripping of

400kV Coastal-

Tuticorin PS

line

19-02-2015

at

16:37 hrs

Line tripped at Coastal end only

due to suspected PLCC maloperation

and was holding from

Tuticorin PS end. Running Unit at

Coastal energen also got tripped

during the event.

PLCC end-to-end testing shall be carried out by CEPL and

Tuticorin PS (PGCIL-SR II) by

06.04.2015.

CEPL/

PGCIL(SR-II)

Mail received on 02-09-2015 and 25-11-2015:

On 11.06.2015 PLCC testing carried out by M/s ABB Engineer. ABB suspects

that the problem is with frequency interference related issue, and suggested to

change to new frequecies.

Pending

with CEPL

42/II/1

8

Multiple

tripping at

Raichur

thermal

power station

of

KPCL

09-03-2015

at

06:36 hrs

400kV Raichur TPS-Raichur(PG) line-

1&2, 400kV Raichur-Mahboobnagar,

Unit#7 and ICT-2 at RTPS tripped

during the incident. B phase to earth

fault had occurred in 400kV Raichur

TPS-Raichur line-1

1. KPCL to review REF setting (DMT or IDMTL) for unit-7

by first week of April, 2015 and

inform the same to PCSC forum.

2. TSTRANSCO to furnish Mehaboobnagar’s DR and EL

and the reasons for distance relay

operation at their end within a week’s time.

3. PGCIL (SR-I) to rectify the issues relating to A/R

operation, relay reach (Z2), reverse reach

(Z4) and SOTF auxiliary contacts within a week’s time, and

submit the actions taken to

PCSC forum.

KPCL/TSTR

ANSCO/PGC

IL (SR-I)

Mail received on 26-05-2015 from TSTRANSCO:

It is found that the main-2 ABB make REL316 type distance relay was

defective and same was replaced with MICOM P444 by M/s.PGCIL on 23.04-

2015. After replacement of main-II, DR can be extracted from this relay. For EL

in to service, some field winding is pending which is being taken up in this

month.

Pending

Miscellaneous

39/I/2 Tripping of

400Kv

Ghanapur-

Mamidipally

line

22-12-14

at 10:52 hrs,

24-12-14 at

11:32

hrs,

24-12-14 at

16:16 hrs

Due to PLCC Mal-operation at HYD S/S end,

DT received at MMPLY end and line got

tripped.

PGCIL is requested check up with the manufacturer to

resolve the issue and submit remedial measures to PCSC

forum.

PGCIL/

TSTRANSCO

Mail received on 26-05-2015 from TSTRANSCO:

On 27-12-2014 PGCIL requested to arrange services of OEM(Manufacturer)for

identifying the problem. TSTRANSCO arranged the same on 06-01-2015 and

the manufacturer testing and concluded that the problem in not in the newly

erected digital protection coupler at both ends and the issue is related to relay

panel at Ghanapur. [OEM minutes enclosed]

Pending

Annexure- V

21

43/II/1

2

Multiple

tripping at

400kV

Raichur(PG)

and RTPS of

KPCL

11-04-2015at

18:04 hrs

400kV Raichur(PG)-Gooty line-2,

400kV Raichur TPS-Raichur(PG)

line-1&2, 400kV Raichur-

Mahboobnagar, Unit#5 at RTPS

tripped during the incident

KPCL, KPTCL and PGCIL (SR-I) to furnish the action

taken report on the

recommendations given by PSAG members held at Raichur

on 22-04-2015 and

23-04-2015.

KPCL/KPTC

L/ PGCIL(SR-

I)


Tripping of

Unit 1 at

NCTPS

24-05-2015

at 19:13 hrs

ID Fan trip

Tripping of

Unit 1 at

MEPL

24-05-2015

at 19:13 hrs

Coal Mill tripped

Tripping of

Unit 1 at

Krishnapatnam

24-05-2015

at 19:17 hrs

Generator Protection operated

Tripping of

Unit-8 at RTPS

24-05-2015

at 19:19 hrs

Tripped on Overvoltage.

As per FIR submitted, CT damage observed in

Chitoor-Main bay (404). Main breakers

connected to bus-1 (401, 404, 407, 410) got

tripped on operation of bus bar protection. Unit-

1 tripped on operation of MFT. Unit-2 was not

in service

08-09-2015

at 18:20 hrs

Complete

outage of

Krishnapatnam

TPS

47/I/2

(GD)

PendingMEPL vide their mail dated 14.09.2015: informed the following

1. Tan Delta Testing of winding and DGA of Insulating Oil for all CTs was

carried out and normal.

2. Could not find any problem during internal checks hence we are in touch with

ABB for rectification work. Will be done by the end of 15th Oct'15

3. End to end testing of Carrier signals was carried out and found them healthy.

MEPL/

PGCIL(SR-I)/

SEL

1. MEPL to ensure healthiness of all CT’s by carrying out

Tan Delta and DGA tests wherever necessary.

2. MEPL to take suitable action to correct the operation of

tie-CB Bay Control Unit that caused LBB/ BBP operation.

3. PGCIL (SR-1) to carry out end-to-end PLCC testing in

coordination with MEPL and ensure that carrier-aided

protection on MEPL – NPS line is in healthy condition.

4. SEL to properly time-coordinate their Over Current

phase and Earth fault relays in consultation with MEPL.

Y phase CT failure at MEPL led to tripping of

400kV NPS-MEPL, 400kV SEPL-MEPL line

and Unit-2 at MEPL. Uni-1 was not in service

at the time of tripping

20-05-2015

at 20:38 hrs

Complete

outage of

MEPL power

station

45/I/2

(GD)

PendingYet to be informedAPGENCO/

PGCIL (SR-I)

1. APGENCO to furnish to PCSC forum (i) A3-size Single

Line Diagram of SDSTPS, and (ii) the sequence of

events with time stamp showing the protection that opened

Tie-CB (405) at SDSTPS.

2. APGENCO to review STUB/TEED protection in all dias

at SDSTPS and ensure that they are configured

for instantaneous operation.

3. APGENCO to properly configure the STATE of the

tripping events so that they get recorded

appropriately like TRIP/ OPERATED in their corresponding

Event Loggers.

4. APGENCO to ensure time sync of all DR’s and EL’s at

SDSTPS.

5. PGCIL (SR-I) to provide line differential protection for

400 kV NPS –Nellore-PG lines 1 & 2.

44/I/3

(GD)

1. All Tripped units, viz., Krishnapatinam, MEPL, Raichur,

NCTPS to submit a detailed report

on this event including the remedial measures taken to PCSC

forum.

2. KPCL to check the excitation system of Unit 8 of RTPS,

and submit the remedial measures

taken to PCSC forum.

KPCL/

MEPL/

APGENCO/

TNEB

TANGEDCO vide their mail dated 07.07.2015 informed that as per the

discussion and recommendation of 44th meeting of PCSC held on 28.05.2015, a

time delay of 2 Sec had been introduced for the above tripping for all the ID

fans at NCTPS-II.

MEPL vide their mail dated 14.09.2015 informed that they have implemented 2

seconds delay for under voltage tripping of all Drag Chain Feeder Conveyors.

And this has been done for both the Units.

Pending

with

KPCL,

APGENC

O

Annexure- V

22

47/II/9 Tripping of

400kV Coastal-

NTPL line and

running units

at NTPL

03-08-2015

at

15:43 hrs

R-phase to earth fault had occurred in 400 kV

Coastal NTPL line. Line autoreclosed at NTPL

end and failed to reclose at Coatal end. Auto

reclose block was persisting due to PLCC

channel fail. Also running Units-1&2 at NTPL

tripped on operation of GT differential

protection.

1. NTPL to ensure (i) proper DATE settings, and (ii) time-

sync with GPS for DR and EL at NTPL.

2. CEPL to furnish remedial measures taken regarding

PLCC channel failure.

NTPL/ CEPL Yet to be informed Pending

50/II/1

1

Tripping of

400kV Neyveli

TS2-Pugalur

line

14-11-2015

at 4:01 hrs

Line tripped on operation of over voltage

protection at Pugalur end. However from DR it

was observed that the voltages were below the

O/v stg-1 threshold limits

NLC to configure DT receipt event from Pugalur for

triggering DR and EL at NLC TPS II.

PGCIL (SR-II) to check drop-off to pick-up ratio of OVR

relay at Pugalur and configure its operation as per SRPC

provided OVR gradings.

NLC / PGCIL

(SR-II)

NLC mail received on 25-03-2016:

Recommended configuration of DR/EL will be done during shut down of feeder

Pending

Pending

49/II/1

1

Tripping of

400/220 kV

ICT-2 at

Kurnool

Substation and

400kV

Kurnool-

Srisailam line

26-10-2015

at 14:31 hrs

400kV Kurnool-Srisailam line - distance

protection zone-2 had operated at Srisailam

end. However from DR, R-phase to earth fault

and zone-2 start were observed. Breakers at

Kurnool end tripped on direct trip receive from

Srisailam end.

ICT-2 Main-CB tripped due to operation of

bus bar protection, and Tie-CB tripped due to

DT receipt from Srisailam

1.TSGENCO in coordination with APTRANSCO to carry

out end-to-end testing of PLCC channels by 15.12.2015 on

400 kV Srisailam – Kurnool S/C line and 400 kV Srisailam

– Sattenapalli D/C line.

2. TSGENCO and APTRANSCO to make A/R functional

on 400 kV Srisailam – Kurnool line.

3. TSGENCO to resolve configuration problems with the

newly commissioned relays at Srisailam LB so that

unwarranted DT sending to remote ends is addressed.

TSGENCO/

APTRANSC

O

TSGENCO mail received on 24-02-2016:

1. TSGENCO in coordination with APTRANSCO, PLCC end to end testing

completed for Srisailam- Kurnool S/C line and DT Send/ Receive & Carrier

Send/ Receive Signals are found normal.

2. Auto- reclose was disabled at Srisailam end for SSLM- KNL feeder ( As per

the settings given by Systems Protection/ TSTRANSCO). The feeder contains

XLPE cable & GIS.

3. TSGENCO intimated to M/s ABB India Ltd. Service Engineer will come and

resolve the configuration problems.

APTRANSCO mail received on 24-02-2016:

In coordination with the TSGENCO end to end PLCC Channels and carrier

aided protection schemes testing was carried out and found satisfactory.

Pending

Tripping of

220kV Kadra-

Karwar line-

1&2 and

220kV

Kaiga-Kadra

line

47/II/7

Yet to be informedPGCIL (SR-I)

/ KPTCL

1. For Gooty –Nelamangala line, PGCIL (SR-I) and

KPTCL to provide 3-ph trip logic at their respective ends

upon detection of PLCC link failure during dead-time of

A/R operation.

2. PGCIL (SR-I) to make GPS functional at Gooty SS, and

ensure time-sync of various DR’s and EL’s with it (GPS).

3. PGCIL (SR-I) /KPTCL to furnish reason for the operation

of Backup impedance protection of the line reactor at

Nelamangala end and the remedial measures taken to PCSC

forum.

R-phase to earth fault had occurred in Line.

Line did not auto-reclose from both ends. It

was mentioned that Y&B pole breakers at

Neelamangala tripped on operation of pole

discrepancy and backup impedence protection

for line reactor got operated.

12-11-2015

at 00:20 hrs

Tripping of

400kV Gooty-

Nelamangala

line

50/II/8

PendingYet to be informedKPTCL/

KPCL/

NPCIL

1. KPTCL/ KPCL to see the possibility of implementing

Weak Infeed logic with Echo feature enabled by Under

Voltage (27) element on Kadra-Karwar lines 1 &2, and

implement the same if feasible.

2. NPCIL to time-coordinate Kaiga’s DEFR settings with (i)

Zone-2 settings at Kaiga, and (ii) primary protections of the

lines emanating from Kadra and Kodasalli.

3. KPCL to ensure time-sync of EL’s, and healthiness of the

Fault Locators at Kadra.

220kV KAdra-Karwar lines-1&2 tripped

on earth fault in B-phase in zone-2.

Kaiga-Kadra line tripped at Kaiga end

only on operation of directional eath

fault protection.

31-07-2015

at

11:44 hrs

Annexure- V

23

51/II/6 Tripping of

400kV

Sattenapalli-

Vijayawada

line

25-12-2015

at 3:01 hrs

Line tripped due to operation of over voltage

protection at Vijayawada end and Direct Trip

was received at Sattenapalli end

1. PGCIL (SR-I), in co-ordination with APTRANSCO, to

address the problem with CB at the earliest opportune time.

2. APTRANSCO to take steps to replace the faulty Event

Logger at Vijayawada (Nunna) SS.

PGCIL (SR-

I)/

APTRANSC

O


52/I/8

(GD)

Complete

outage of

400kV NTPL

station and

CEPL Stations

14-03-2016

at 01:36 hrs

Running Units at NTPL and Coastal Energen

power station got tripped due to tripping of

evacuating lines.

NTPL and PGCIL (SR-II) to furnish compliance report of

the recommendations given by PSAG-15 Committee that

held its meeting on 12-13 April, 2016 at NTPL, Tuticorin.

NTPL/

PGCIL (SR-

II)


Annexure- V

24

Sl.No. Element NameOutage

date/time

Revival

date/timeReason for Outage Sender/ Receiver

Remedial Measures/ Actions

taken

1765 KV RAICHUR -

SHOLAPUR 2

02-01-

2016/10:46:

00

CONDUCTER

SNAPPING

PGCIL (SR-I) / PGCIL

(WR-I)To-be-discussed

2400 Kv VTPS - MALKARAM

2

31-01-

2016/14:23:

00

R-N FAULTAPGENCO /

TSTRANSCOTo-be-discussed

3400 kV VIJAYAWADA -

NELLORE 1

01-02-

2016/12:57:

00

01-02-

2016/18:49:

00

TRIPPED ON

Y_N FAULT 257

KM FROM VJA

PGCIL (SR-I) To-be-discussed

4 400 Kv NTPL - TTRNPS

05-02-

2016/11:47:

00

05-02-

2016/13:05:

00

HOT SPOT @

NTPL ENDNTPL / PGCIL (SR-II) To-be-discussed

Pending Remedial Measures/ Actions taken

for the Critical Tripping Incidents (as on 15-04-2016)

Annexure-VI

1

5220 kV IDUKKI -

UDUMALPET

28-02-

2016/13:40:

00

28-02-

2016/14:17:

00

PHASE TO

PHASE FAULTKSEB/ TANTRANSCO

KSEB: On 28.02.2016,

IDUD feeder tripped on

zone 1 at both end. At

Idukki end tripped,

reclosed and tripped. The

tripping was normal. The

carrier receive at Idukki

end was not functional due

to the wiring problem of

the relay. The relay is new,

hence the DR to be fine-

tuned for getting clarity for

the wave form. The

problem will be solved as

early as possible.

TANTRANSCO:

Temporary fault. AR lock

out at Udumalpet end.

Feeder charged from

Udumalpet end and tied at

Idukki end on 28.02.2016

at 14:17 hrs.

6400 kV NEYVELI TS2-

NEYVELI TS-2

29-02-

2016/12:08:

00

29-02-

2016/12:34:

00

PLCC

MALOPERATIO

N

NLC To-be-discussed

Annexure-VI

2

7 220 kV SEDAM - TANDUR

29-02-

2016/18:14:

00

29-02-

2016/22:23:

00

DISTANCE

PROTECTION

OPERATED

KPTCL/ TSTRANSCO

KPTCL: As per the

information received from

Tandoor Sub station, bus

fault had occurred at

Tandoor Sub station during

the instance.

TSTRANSCO:

8400 kV KHAMMAM -

KALPAKKA 1

01-03-

2016/05:35:

00

R-N FAULTPGCIL (SR-I) /

APTRANSCO

APTRANSCO:

Momentary Fault

PGCIL (SR-I):

9400 Kv KUDGI- KOLHAPUR-

2

04-03-

2016/07:18:

00

04-03-

2016/07:38:

00

DT RECEIVED

AT KUDGI END.

PGCIL (SR-II) / PGCIL

(WR-I)

PGCIL (SR-II): 'Tripped on

receipt of DT from

Kolhapur end, due to

operator error at Kolhapur

end.

10400 kV NEYVELI TS 2 -

NEYVELI TS2

04-03-

2016/11:22:

00

04-03-

2016/17:07:

00

TRIPPED AT

NLCTS2 ENDNLC To-be-discussed

11220 kV AMBEWADI -

PONDA 1

05-03-

2016/14:32:

00

05-03-

2016/17:50:

00

DISTANCE

PROTECTIONKPTCL / GOA

KPTCL: Transient fault.

Stood OK after test

charging.

12220 kV KANIAMPET -

KADAKOLA

05-03-

2016/13:29:

00

05-03-

2016/14:02:

00

DISTANCE

PROTECTIONKSEB / KPTCL To-be-discussed

13400 kV RAMAGUNDAM -

CHANDRAPUR 2

07-03-

2016/19:39:

00

07-03-

2016/20:50:

00

R - B FAULTNTPC / PGCIL (WR-I) /

PGCIL (SR-I)To-be-discussed


CHANDRAPUR 2

08-03-

2016/23:55:

00

09-03-

2016/01:01:

00

TRIPPED ON R-B

FAULT

NTPC / PGCIL (WR-I) /

PGCIL (SR-I)To-be-discussed

Annexure-VI

3

15 400 Kv NELLORE - SPDR 2

09-03-

2016/17:20:

00

09-03-

2016/19:34:

00

ISO. PROBLEMAPTRANSCO / PGCIL

(SR-II)

APTRANSCO: Nellore-

SPDR-2 line pertains to

PGCIL.

PGCIL (SR-II):

16400 kV N'SAGAR -

CUDDAPPA 1

12-03-

2016/12:13:

00

12-03-

2016/13:23:

00

Y-N FAULT PGCIL (SR-I) To-be-discussed

17 220 kV SABARGIRI - THENI

12-03-

2016/13:55:

00

12-03-

2016/14:35:

00

R-N FAULT KSEB/ TANTRANSCO

TANTRANSCO:

Temporary fault. AR

lockout at Theni end.

Feeder normalised at 14:35

hrs.

KSEB:

18220 kV AMBEWADI -

PONDA 1

14-03-

2016/03:44:

00

B-N FAULT KPTCL / GOA To-be-discussed

19220 kV IDUKKI -

UDUMALPET

15-03-

2016/02:09:

00

15-03-

2016/02:51:

00


TANTRANSCO:

Temporary fault. AR

successful at Udumalpet

end. Tx incremented by 1.

Feeder tied at Idukki end

on 15.03.2016 at 02:51 hrs.

KSEB:


WARANGAL

15-03-

2016/11:00:

00

15-03-

2016/11:31:

00

AUTORECLOSU

RE LOCKOUTNTPC / PGCIL (SR-I) To-be-discussed

Annexure-VI

4

21220 kV IDUKKI -

UDUMALPET

15-03-

2016/02:09:

00

15-03-

2016/02:51:

00


TANTRANSCO:

Temporary fault. AR




on 15.03.2016 at 02:51 hrs.

KSEB:

22400 Kv SRISAILAM-

SHANKARPALLY

15-03-

2016/06:50:

00

15-03-

2016/21:45:

00

TRIPPED ON

RELAY MAL

OPERATION

TSGENCO /

TSTRANSCO

TSGENCO:At Srisailam

End Feeder Tripped on DT

receive from Shankarpally.

Feeder was Hand tripped at

Shankarpally End.

TSTRANSCO:

23400/220 kV ICT-2 AT

MAMIDIPALLY

15-03-

2016/15:13:

00

15-03-

2016/15:40:

00

LBB OPERATED

IN 220 KV BUSTSTRANSCO To-be-discussed

24400/220 kV ICT-3 AT

RAICHUR

15-03-

2016/12:28:

00

15-03-

2016/17:16:

00

PT FUSE

FAILUREKPCL To-be-discussed

25 400/220 kV ICT-3 AT HOODY

15-03-

2016/16:44:

00

15-03-

2016/17:32:

00

TRIPPED ON

OVER CURRENTKPTCL To-be-discussed

26 400 Kv COSTAL - NTPL

16-03-

2016/06:43:

00

16-03-

2016/19:25:

00

TRIPPED CEPL / NTPL To-be-discussed

Annexure-VI

5


16-03-

2016/05:36:

00

16-03-

2016/06:08:

00

R-N FAULT,A/R

SUCCESSFUL AT

TTRNPS END.

NTPL / PGCIL (SR-II)

PGCIL (SR-II): Tripped at

NTPL end only. A/R

successful at Tuticorin PS

end.

NTPL:

28220 kV IDUKKI -

UDUMALPET

16-03-

2016/10:01:

00

16-03-

2016/17:40:

00

PETROLLING OF

LINE BY TNEBKSEB/ TANTRANSCO

TANTRANSCO:

Temporary fault. AR




on 16.03.2016 at 01:26 hrs.

By availing Line clear on

22.03.2016 for line patrol,

tree cutting was carried out

at location No. 80.

KSEB:

29220 kV GUMMUDIPUNDI -

SULLURPET

17-03-

2016/13:04:

00

17-03-

2016/13:53:

00

DISTANCE

PROTECTION

TANTRANSCO /

APTRANSCO

TANTRANSCO:

Temporary fault. AR not

enabled due to Breaker

problem.

APTRANSCO:

Momentary Fault

30 400 Kv RAICHUR - YTPS

17-03-

2016/12:04:

00

17-03-

2016/16:49:

00

B - N FAULT KPCL To-be-discussed

31400 Kv SOMANHALLI -

HOSUR

17-03-

2016/15:39:

00

17-03-

2016/15:46:

00

TRIPPED AT

HOSUR END

ONLY

PGCIL (SR-II)

PGCIL (SR-II): Manual

error during online testing

of relay.

Annexure-VI

6

32400/230 Kv ICT-1 AT

ARASUR

19-03-

2016/14:44:

00

19-03-

2016/15:27:

00

TRIPPED ON WT

INDICATIONPGCIL (SR-II) To-be-discussed

33400/230 Kv ICT-2 AT

ARASUR

19-03-

2016/14:46:

00

19-03-

2016/15:26:

00

TRIPPED ON

OVER LOADPGCIL (SR-II) To-be-discussed

34220 Kv REGULAPADU-

ALIPUR LINE

20-03-

2016/13:20:

00

20-03-

2016/14:00:

00

PHASE TO

GROUND FAULTAPTRANSCO / KPTCL To-be-discussed


21-03-

2016/05:26:

00

21-03-

2016/05:35:

00

B-N FAULT NTPL / PGCIL (SR-II) To-be-discussed

36 400 kV KAIGA - GUTTUR 1

21-03-

2016/14:20:

00

21-03-

2016/15:16:

00

DISTANCE

PROTECTIONKAPS / KPTCL To-be-discussed

37400/230 kV ICT-1 AT

MADURAI

21-03-

2016/14:26:

00

21-03-

2016/15:07:

00

220 KV SIDE

PROBLEMPGCIL (SR-II) To-be-discussed

38400/230 kV ICT-2 AT

MADURAI

21-03-

2016/14:26:

00

21-03-

2016/14:52:

00

220 KV SIDE

PROBLEMPGCIL (SR-II) To-be-discussed

39400 kV KHAMMAM -

N'SAGAR 1

22-03-

2016/11:12:

00

22-03-

2016/12:09:

00

TRIPPED ON B-N

FAULTPGCIL (SR-I) To-be-discussed

40400 kV GHANAPUR -

MAMIDIPALLY

22-03-

2016/12:13:

00

22-03-

2016/12:25:

00

DT RECIEVED

AT MDPLI END

ONLY

PGCIL (SR-I) /


41400 Kv IL&FS -

NAGAPATTANAM-1

23-03-

2016/12:29:

00

23-03-

2016/12:49:

00

TRIPPED ON R-N

FAULTILFS / PGCIL (SR-II) To-be-discussed

42220 kV AMBEWADI -

PONDA 1

25-03-

2016/13:10:

00

25-03-

2016/16:19:

00

Y- B FAULT KPTCL / GOA To-be-discussed

Annexure-VI

7

43400 kV MUNIRABAD -

GUTTUR

28-03-

2016/10:35:

00

28-03-

2016/10:46:

00

TRIPPED AT

GTR END ONLYPGCIL (SR-I) / KPTCL To-be-discussed

44400 kV GHANAPUR -

MAMIDIPALLY

31-03-

2016/16:26:

00

31-03-

2016/16:41:

00

PLCC

MALOPERATIO

N

PGCIL (SR-I) /


45 HVDC GAJUWAKA POLE 1

31-03-

2016/15:09:

00

ASYMMETRIC

FAULTPGCIL (SR-I) To-be-discussed

46 400 Kv RAICHUR - YTPS

31-03-

2016/16:30:

00

31-03-

2016/17:57:

00

R -N FAULT KPCL To-be-discussed

47 400 Kv BTPS - YTPS

31-03-

2016/16:30:

00

31-03-

2016/17:45:

00

R -N FAULT KPCL To-be-discussed

48400/220 kV ICT-1 AT

GUTTUR

31-03-

2016/20:24:

00

31-03-

2016/20:57:

00

RELAY

MALOPERATIO

N

KPTCL To-be-discussed

49400 Kv KAYATHAR -

KARAIKUDI 1

01-04-

2016/12:49:

00

REASON

AWAITED

TANTRANSCO / PGCIL

(SR-II)To-be-discussed

50 400 Kv NCTPS - VALLUR 2

02-04-

2016/02:09:

00

TRIPPED ON R-

PH FAULTTANGEDCO / NTECL To-be-discussed

51400 kV MAHABOOB NAGAR

- RAICHUR

05-04-

2016/10:23:

00

05-04-

2016/11:01:

00

MASTER TRIP

RELAY

OPERATED

TSTRANSCO / KPTCL To-be-discussed


07-04-

2016/19:42:

00

HEAVY

TRACKING @

VLR END

TANGEDCO / NTECL To-be-discussed

53 400 Kv HASSAN - UPCL 2

07-04-

2016/12:55:

00

07-04-

2016/13:13:

00

TRIPPED ON B-

PH FAULTPGCIL (SR-II) / UPCL To-be-discussed

Annexure-VI

8

54 400 Kv HASSAN - UPCL 2

07-04-

2016/13:32:

00

07-04-

2016/17:09:

00

TRIPPED ON B-

PH FAULTPGCIL (SR-II) / UPCL To-be-discussed

55400 Kv KAYATHAR -

KARAIKUDI 1

07-04-

2016/12:50:

00

07-04-

2016/14:09:

00

TRIPPED

REASON

AWAITED

TANTRANSCO / PGCIL

(SR-II)To-be-discussed


07-04-

2016/18:48:

00

HEAVY

TRACKING @

VLR END



08-04-

2016/17:59:

00

HEAVY

TRACKING AT

VLR END



08-04-

2016/17:59:

00

HEAVY

TRACKING AT

VLR END


59 400 Kv KLVDPT - VALLUR 2

10-04-

2016/14:59:

00

10-04-

2016/15:42:

00

R-N FAULT PGCIL (SR-II) / NTECL To-be-discussed

60400 kV SIMHADRI -

GAZUWAKA 2

10-04-

2016/04:21:

00

TRIPPED ON R-

PH FAULTNTPC / PGCIL (SR-I) To-be-discussed

Annexure-VI

9

Islanding Schemes in Southern Region

Load Relief from AUFR and df/dt

Sl. No

AUFR and df/dt

stages

AP TS KAR KER T N PED

Reco

mm

end

ed

Implem

ented

Reco

mm

end

ed

Implem

ented

Reco

mm

end

ed

Implem

ented

Reco

mm

end

ed

Implem

ented

Reco

mm

end

ed

Implem

ented

Reco

mm

end

ed

Implem

ented

AUFR Average MW

1 Stage-I (49.2 Hz) 392 392 417 419 576 578 204 214 740 804 21 21

2 Stage-I (49.0 Hz) 393 393 419 420 578 578 205 217 744 808 21 22

3 Stage-I (48.8 Hz) 398 398 424 426 586 593 208 212 753 867 21 25

4 Stage-I (48.6 Hz) 399 399 426 431 588 593 209 211 756 867 22 24

AUFR Total 1582 1582 1686 1696 2328 2342 826 854 2993 3346 85 92

1 df/dt stage-I (at 49.5

Hz & 0.2 Hz/sec fall

of frequency) 345 345 367 368 474 483 172 178 624 626 18 12

2 df/dt stage-II (at 49.3

Hz & 0.3 Hz/sec fall

of frequency) 855 855 912 914 737 734 175 175 559 572 0 6

df/dt Total 1200 1200 1279 1282 1211 1217 347 353 1183 1198 18 18

Feeder Tripping Frequency for Islanding: 47.9 Hz

Methodology:

Anticipated Generation = G

Total Loads participating = Dp

Combined Load Relief

from AUFR and df/dt relays = Dr Anticipated load (D) = Dp - Dr

As per guidelines, Islanded Electrical System should have

20% more generation than load. Accordingly Constituents are

requested to provide details for Anticipated Generation and

Anticipated load for the following Islands of SR.

Annexure- VII

Page 1 of 10

SRPC Secretariat| As on January, 2016 1

1. Hyderabad Islanding Scheme

Anticipated Generation 2896 MW

Total Loads Participating 3332.245 MW

AUFR+df/dt Load relief 200 MW

Anticipated Load 3132.2 MW

a) Generators Participating

S.No. Generator Entity

Anticipated MW

Supplying

1 ORIENT CEM 220.00 IPP 45

2 RGM-NTPC 400.00 RGM-TPS 187







9 KKTYATPS 400.00 TSGENCO 421

Anticipated Generation Total 2896

b) Loads Participating

Bus Number Load Entity Pload (MW)

422002 CHADRTTA 220.00 TS_STU 403.7675

422017 GACIBWLI 220.00 TS_STU 343.3528

422020 MOULALI 220.00 TS_STU 318.0552

422021 DURSHED 220.00 TS_STU 162.24

422024 MALKARAM 220.00 TS_STU 29.8391

422029 MEDCHAL 220.00 TS_STU 266.5906

422037 HIAL 220.00 TS_STU 54.466

422039 SIVRALLY 220.00 TS_STU 212.3238

422041 GAJWEL 220.00 TS_STU 177.0771

422044 PULKUTHY 220.00 TS_STU 15.1105

422053 SALIVAGU 220.00 TS_STU 6.9313

422055 BLMPLLI 220.00 TS_STU 138.4262

422063 SADASIVPET 220.00 TS_STU 129.8335

424002 RGM-NTPC 400.00 NTPC_SR 387.6287

422011 SHAURGAR 220.00 TS_STU 324.5029

Annexure- VII

Page 2 of 10


422003 GHANAPUR 220.00 PGCIL_CTU 307.6458

422009 MALALLLI 220.00 TS_STU 54.4536

Total Loads participating 3332.245

AUFR Relief 200

df/dt Relief

Anticipated Load 3132.2

c) Feeders Tripping Sl.No Voltage

level

No. of

Circuit

From Bus Name To Bus Name

1 400 kV D/C Ramagundam Nagarjunasagar (Talapalli)

2 400 kV D/C Khammam Mamidapalli

3 400 kV D/C Malkaram VTPS- Stage-IV

4 400 kV D/C Ramagundam Bhadrawati

5 400 kV S/C Ghanapur Nagarjunasagar (Talapalli)

6 400 kV S/C Ghanapur Kurnool

7 400 kV S/C Shankarapalli Srisailam Left Bank

8 400 kV S/C Mamidapalli Srisailam Left Bank

9 400 kV S/C Ramagundam Dichipaly

10 400 kV S/C Khammam Warangal

11 220 kV S/C Kotagudem Shapurnagar

12 220 kV D/C Narketpalli Malkaram

13 220 kV D/C Dindi Chandrayengutta

14 220 kV S/C Malayalapalli Jagtiyal

15 220 kV D/C Malayalapalli Nagaram

16 220 kV D/C Warangal Nagaram

17 220 kV S/C Malayalapalli Bhimgal

18 220 kV S/C Malayalapalli Vemanoor

19 220 kV S/C Malayalapalli Medaram

20 220 kV S/C Shankarapalli Tandur

21 220 kV S/C Mamidapalli Shamshabad

22 220 kV S/C Mamidapalli Shadnagar

23 220 kV D/C Durshed Siddipet

24 220 kV D/C Gajwel Minipur

25 220 kV D/C Gajwel Kamareddy

26 220 kV D/C Yeddumailaram Shankarapalli

Annexure- VII

Page 3 of 10


2. Chennai Islanding Scheme







Anticipated

MW

Supplying

1 ETPS2 230.00 TN 30

2 MAPS2 230.00 MADRAS-APS 304

3 NCTPS-I 230.00 TN 594

4 SDEV 230.00 TN 10

5 OPG_ALM 230.00 TN 0

6 SUZLON 230.00 TN 0

7 KAMACHI 230.00 TN 5

8 KAVERI 230.00 TN 3

9 ARS 230.00 TN 3

10 VALLUR 400.00

NTECL-

VALLUR 1425

11 NCTPS-II 400.00 TN 1110

Anticipated Generation 3484

b) Load Participating


442001 TVALAM2 230.00 TN_STU 155.0332

442002 GUMDIP2 230.00 TN_STU 32.2072

442007 ACHARAP2 230.00 TN_STU 39.3613

442014 ARNI2 230.00 TN_STU 194.2737

442015 BASINBR2 230.00 TN_STU 87.9435

442021 ETPS2 230.00 TN_THERMAL 111.0315

442024 HYNDAI2 230.00 TN_STU 54.457

442027 KADAPEI2 230.00 TN_STU 202.5802

442034 KILPAWW2 230.00 TN_STU 133.2734

442037 KORATUR2 230.00 TN_STU 210.8154

442038 KOYMBDU2 230.00 TN_STU 239.1693

442043 MANALI2 230.00 TN_STU 135.3065

Annexure- VII

Page 4 of 10


442046 MOSUR2 230.00 TN_STU 248.8731

442049 MYLAPOR2 230.00 TN_STU 343.0261

442055 NOKIA2 230.00 TN_STU 23.175

442056 ORAGADM2 230.00 TN_STU 118.4877

442074 SIRSERI2 230.00 TN_STU 103.7713

442075 MAMBAKM 230.00 TN_STU 89.7883

442078 SPKOIL2 230.00 TN_STU 235.5069

442082 TARMANI2 230.00 TN_STU 189.2855

442083 TONPET2 230.00 TN_STU 140.0097

442094 VEERPRM2 230.00 TN_STU 112.0652

442099 KITSPARK 230.00 TN_STU 49.7665

442119 CMRL 230.00 TN_STU 20.186

442128 ALDRCMRL 230.00 TN_STU 20.1861

442129 GUINDY 230.00 TN_STU 146.5847

444001 SRPRMBDR 400.00 PGCIL_CTU 443.1275

444002 ALAMATTY 400.00 TN_STU 229.9846

444018 SVCHTRM 400.00 TN_STU 124.8129

Total Loads Participating 4234.089

AUFR Relief 620

df/dt Relief Anticipated Load 3614.089

c) Feeders Tripping

Sl.No Voltage

level

No. of

Circuit


400 kV D/C Sriperumbudur Nellore- PG

400 kV D/C Kalavindapattu Pugalur

400 kV D/C Chitoor Thiruvallam

400 kV D/C Thiruvalam- TN Mettur-Stage-III

400 kV D/C Thiruvalam Nellore- PG

400 kV S/C Chitoor Sriperumbudur

400 kV S/C Thiruvallam Kolar- PG

400 kV S/C SV Chatram Pondicherry

400 kV S/C Sriperumbudur Chitoor

230 kV S/C Arani Singarapettai

230 kV S/C Acharapakkam Villupuram

230 kV S/C Singarapettai Thiruvalam- TN

230 kV S/C Chitoor Thiruvallam- TN-2

230 kV S/C Gummdipondi Sulurpet

Annexure- VII

Page 5 of 10


d) ICT Tripping Sl.No High Voltage (HV)

level

HV side- Bus Name Low Voltage (LV)

level

LV side- Bus

Name

1 765 kV Thiruvalam 400 kV Thiruvalam

2 765 kV Thiruvalam 400 kV Thiruvalam

3. Neyveli Islanding Scheme




Anticipated Load 3994.285MW



Anticipated

MW Supplying

1 Kadmparai TN 300

2 Kundah 2 TN 30.4

3 Kundah 3 TN 150

4 Kundah 4 TN 100

5 MTPS Stage-2 TN 792

6 MTRPH TN 0

7 STCMS TN 250

8 NLCTS12 230.00 TN 251.1

9 NLC22 230.00 NEYVELI-ALL 567

10 PP Nalur TN 0

11 PUSHEP TN 150

12 Suzlon TN 0

13 NLC1EXP 400.00 NEYVELI-ALL 384

14 NLC2 400.00 NEYVELI-ALL 756

15 NLC2EXP 400.00 NEYVELI-ALL 450

16 METR-III 400.00 TN 565

17 ILFS 400.00 ILFS 540

Anticipated Generation 5285.5

Annexure- VII

Page 6 of 10




442005 UDMLPT2 230.00 TN_STU 150.1811

442010 ALUNDR42 230.00 PGCIL_CTU 142.6378

442013 ARASUR2 230.00 TN_STU 389.5652

442017 CUDALRE2 230.00 TN_STU 165.7051

442018 DEVKRCY2 230.00 TN_STU 192.4078

442019 EACHNGA2 230.00 TN_STU 56.7152

442022 GOBI2 230.00 TN_STU 321.009

442025 INGUR2 230.00 TN_STU 401.9839

442026 KADALAN2 230.00 TN_STU 34.9428

442042 MTRAUTO 230.00 TN_STU 166.3279

442045 OKMNTPM 230.00 TN_STU 273.1627

442053 NLC22 230.00 TN_STU 125.49

442057 PALADAM2 230.00 TN_STU 260.6523

442060 PERMBLR2 230.00 TN_STU 241.6082

442061 PONPRM2 230.00 TN_STU 356.9801

442069 SALEM2 230.00 TN_STU 393.6232

442071 SAMAYPM2 230.00 TN_STU 129.861

442081 TANJORE2 230.00 TN_STU 180.993

442084 TRICHY2 230.00 TN_STU 280.4979

442088 TUDIYLR2 230.00 TN_STU 65.5438

442089 TVARUR2 230.00 TN_STU 40.98

442090 TVMALAI2 230.00 TN_STU 166.6578

442092 UNJANAI2 230.00 TN_STU 158.9933

442096 VILUPRM2 230.00 TN_STU 69.1459

442102 SDYPLYM 230.00 TN_STU 32.7086

442106 ANIKADVU 230.00 TN_STU 18.69

442107 ALIYAR 230.00 TN_STU 31.203

442126

PALKAPALYAM

230.00 TN_STU 90.8307

442127 ANTHIYUR 230.00 TN_STU 96.6601

444008 SALEM-TN 400.00 TN_STU 284.5355

452018 PALAKAD 220.00 KL_STU 272.6201

462002 VLIYANR2 230.00 PONDY_STU 204.5312

462003 BHAHUR2 230.00 PONDY_STU 196.8412


AUF Relief 2000

df/dt Relief Anticipated Load 3994.285

Annexure- VII

Page 7 of 10


c) Feeders Tripping Sl.No Voltage

level

No. of

Circuit


1 400 kV D/C Pugalur Kalavindapattu

2 400 kV D/C Myvadi Tirunelveli

3 400 kV D/C Salem Hosur

4 400 kV D/C Thiruvalam- TN Mettur-Stage-III

5 400 kV D/C Palakkad Thrissur

6 400 kV S/C Myvadi Checkanurani (Madurai)

7 400 kV S/C Alandur (Trichy) Checkanurani (Madurai)

8 400 kV S/C Alandur (Trichy) Karaikudi New

9 400 kV S/C Pugalur NLC Expansion 2

10 400 kV S/C Pugalur NLC TPS 2

11 400 kV S/C SV Chatram Pondicherry

12 230 kV S/C Acharapakkam Villupuram

13 230 kV S/C Alandur (Trichy) Alagarkoil

14 230 kV S/C Hosur Mettur Auto

15 230 kV S/C Karimangalam Mettur Auto

16 230kV S/C Pudanchandai Deviakurchi

17 230 kV S/C Pugalur Alandur (Trichy)

18 230 kV S/C Alandur (Trichy) Pudukottai

19 230 kV S/C Pugalur Myvadi

20 230 kV S/C Myvadi Sembatti

21 230 kV S/C Mettur TPS- 2 Singarapettai

22 230 kV S/C Singarapettai Salem

23 230 kV S/C Singarapettai TV Malai

24 230kV S/C Unjani Pudanchandai

25 230 kV S/C Thiruvarur Karambayam

26 230 kV S/C Udumalpet Idukki

27 230 kV D/C Palakkad (400 kVside) Madakathara

28 230 kV S/C Palakkad Madakathara

Annexure- VII

Page 8 of 10


4. Koodankulam Islanding Scheme






S.No. Generators Entity PGen (MW)

1 INDARCPP 230.00 TN 0

2 TTPS2 230.00 TN 990

3 UDAYATR2 230.00 TN 0.4

4 STERLITE2 230.00 TN 6

5 IBPTL 2 230.00 TN 20

6 KKNPP 400.00 KKNPP 950

7 TUTCRNJV 400.00 NTPL 950

8 CENERGY 400.00 COASTL-ENERG 400

9 SABRGRI 220.00 KL 304

10 KAYMKLM 220.00 KL 0

Anticipated Generation 3620.4



442006 THENI2 230.00 TN_STU 143.2453

442008 ALAGARK2 230.00 TN_STU 131.4524

442011 AMADPRM2 230.00 TN_STU 3.7718

442012 ANUPANG2 230.00 TN_STU 273.3405

442032 KARAIKD2 230.00 TN_STU 115.0001

442033 KAYTHAR2 230.00 TN_STU 45.7007

442036 KODIKUR2 230.00 TN_STU 75.8534

442058 PARMKDY2 230.00 TN_STU 96.864

442059 PASUMAL2 230.00 TN_STU 264.121

442063 PUDANS2 230.00 TN_STU 205.5551

442064 PUDUKOT2 230.00 TN_STU 160.8576

442066 PUGALUR2 230.00 TN_STU 249.8756

442068 RENGPRM2 230.00 TN_STU 145.601

442072 SANKNRI2 230.00 TN_STU 13.0247

442073 SEMBATY2 230.00 TN_STU 207.1181

442079 SRPUDUR2 230.00 TN_STU 129.2502

Annexure- VII

Page 9 of 10


442085 TSIPCOT2 230.00 TN_STU 189.6917

442086 TTPAUTO2 230.00 TN_STU 128.5702

442093 VALTHUR2 230.00 TN_STU 75.167

442095 VERANAM2 230.00 TN_STU 3.7374

442108 KRMBYAM 230.00 TN_STU 24.9647

442130 TUTCRNJV 230.00 NTPL 20

444030 KAYATHAR 400.00 TN_STU 63.7883

452003 SABRGRI 220.00 KL_STU 0.382

452004 EDAMAN2 220.00 KL_STU 102.258

452004 EDAMAN2 220.00 KL_STU 114.0903

452007 EDAPAN 220.00 KL_STU 167.1125

452011 KUNDARA 220.00 KL_STU 160.4111

452020 POTHNCOD 220.00 KL_STU 399.0273

452033 PUNPRA 220.00 KL_STU 115.1144


AUFR relief 800

df/dt relief Anticipated Load 3024.946

c) Feeders Tripping Sl.No Voltage level No. of

Circuit


1 400 kV D/C Pugalur Kalavindapattu

2 400 kV S/C Pugalur NLC Expansion 2

3 400 kV S/C Pugalur NLC TPS 2

4 400 kV S/C Alandur (Trichy) Checkanurani (Madurai)

5 400 kV S/C Alandur (Trichy) Karaikudi New

6 400 kV S/C Myvadi Checkanurani (Madurai)

7 400 kV D/C Myvadi Tirunelveli

8 230 kV S/C Pugalur Alandur (Trichy)

9 230 kV S/C Pugalur Myvadi

10 230 kV S/C Myvadi Sembatti

11 230 kV S/C Alandur (Trichy) Alagarkoil

12 230 kV S/C Alandur (Trichy) Pudukottai

13 230 kV S/C Thiruvarur Karambayam

14 230kV S/C Unjani Pudanchandai

15 230kV S/C Pudanchandai Deviakurchi

16 220 kV S/C Idukki New Pallom

17 220 kV S/C Sabarigiri Pallom

18 220 kV S/C Sabarigiri Ambalamugal

19 220 kV S/C Pallom New Pallom

Annexure- VII

Page 10 of 10

A Note on Over Voltage Relay (OVR) grading for Transmission lines

Over Voltage Line Protection is a protection used for preventing the transmission line from

experiencing sustained over voltages. The Over voltage level and the time duration which the

transmission line can be subjected to are generally dictated by parameters like its Voltage-Time

curves, Power Frequency Withstand Voltage, etc.

Since the rate at which the Voltage varies (from slowly increasing ramp to extremely fast changing

ramp) is contingent upon system conditions, it is necessary to provide Two-Stage Over Voltage

Protection (OVR, Stage-I & OVR, Stage-II) to take care of both extremities.

In this regard, we have the following guidelines available for carrying out Over Voltage Relay grading:

A. Ramakrishna Committee Guidelines for Line Over Voltage Protection (These in turn

are based on CBIP and CIGRE guidelines):

FOR 400kV LINES: Low set stage (Stage-I) may be set in the range of 110% - 112%

(typically 110%) with a time delay of 5 seconds. High set stage (Stage-II) may be set in

the range 140% - 150% with a time delay of 100milliseconds.

FOR 765kV LINES: Low set stage (Stage-I) may be set in the range of 106% - 109%

(typically 108%) with a time delay of 5 seconds. High set stage (Stage-II) may be set in

the range 140% - 150% with a time delay of 100milliseconds.

However, for Over Voltage Stage-I protection, a time grading of 1 to 3 seconds may be

provided between overvoltage relays of double circuit lines. Grading on overvoltage

tripping for various lines emanating from a station may be considered and same can be

achieved using voltage as well as time grading. Longest timed delay should be checked

with expected operating time of Over-fluxing relay of the transformer to ensure

disconnection of line before tripping of transformer.

It is desirable to have Drop-off to pick-up ratio of overvoltage relay better than 97%

B. CEA Technical Standards for Construction of Electrical Plants and Electric Lines:

Regulation 43(1)(a): Salient Technical Particulars and Requirements of Substations and

Switchyards:

Power Frequency withstand Voltage under dry conditions for 400 kV SS (kVrms) = 680

Power Frequency withstand Voltage under dry conditions for 765 kV SS (kVrms) = 830

Regulation 89(1)(a)(i): Salient Technical Particulars and Requirements of Transmission

lines:

Power Frequency withstand Voltage under dry conditions

for 400 kV Transmission lines (kVrms) = 680

Power Frequency withstand Voltage under dry conditions for 765 kV Transmission lines (kVrms) = 830

Annexure-VIII

1

Before going into the nitty-gritties of OVR grading, the following may be noted:

1. It may be appreciated that in order for OVR grading to be effective, the Network under

consideration should be a reasonably developed one meaning it should contain sufficient no. of

transmission lines. Because, when only a few lines are present, it is very much possible that over

voltage conditions which those lines are subjected to may not vanish/subside/come down even

after controlled tripping of these lines by OVR grading them. Similarly, when the network is fully

developed [i.e., where from each Node (Bus) emanate a good no. of lines], the chances for over

voltage conditions may get drastically reduced.

2. Since OVR, Stage-II protection is an instantaneous protection, OVR grading of transmission lines

essentially refers to grading them for OVR, Stage-I protection only.

3. It may be noted that since OVR, Stage-I protection is for slowly varying Voltage-ramp (typical of

Indian grid conditions), sufficient time-gap exists before the Node (Bus) Voltage reaches from one

significant level (say 109% of Nominal Voltage) to next higher significant level (say 110% of

Nominal Voltage).

OVR Grading of 400 kV Lines in the Southern Region

For illustration purpose, let us consider the 400 kV network of Southern Region (which has also been

reasonably developed, hence suits for OVR grading):

In line with Ramakrishna Committee guidelines, CBIP guidelines, and CEA Standards, the following

Voltage – Time grading matrix has been adopted for OVR grading 400 kV transmission lines:

1. Voltage-Time (OVR) Grading Matrix:

Voltage Setting (% of Nominal

Voltage)

Time Setting (Sec)

OVR Grading

Order of Tripping

110 10 A 8

110 9 B 7

110 8 C 6

110 7 D 5

109 7 E 4

109 6 F 3

109 5 G 2

109 4 H 1

Here, Nominal Voltage = 400 kV;

Order of tripping = Order in which the lines at a Node (Bus) will be tripped based on their

Voltage and Time settings.

Annexure-VIII

2

2. OVR Grading Order Details:

In the 400 kV Southern Grid, the no. of transmission lines emanating from a particular Node (Bus)

are found to be varying from a minimum of two (2) to a maximum of sixteen (16) lines, which also

means grading has to be given to so many lines at that particular Node. In this regard, the following

Table containing the grading order details has been made use of:

No. of 400 kV Transmission Lines to be OVR Graded at a particular Node

Specific Order being followed for OVR Grading the 400 kV Transmission Lines (from Left to Right) at a particular Node

4 [DCBA/ ECBA/ EDBA]

5 [1/4] [EDCBA]

6 [2/4] [GEDCBA]

7 [2/5] [GEDCBAA]

8 [3/5] [GFEDCBAA]

9 [3/6] [GFEDCBBAA]

10 [4/6] [HGFEDCBBAA]

11 [4/7] [HGFEDCCBBAA]

12 [4/8] [HGFEDDCCBBAA]

14 [5/9] [HGFEEDDCCBBAAA]

16 [5/11] [HGFEEDDCCBBBAAAA]

For example, when the lines to be graded at a Node (Bus) are ‘8’, the Grading Order to be followed is

[3/5] [GFEDCBAA]. Here the first three are given grading at 109% level, and the remaining five are

given grading at 110% level. Since we are employing only eight (8) gradings, it is but obvious that

some of the lines will have to be given the same grading.

Now, having finalized the Voltage-Time gradings to be adopted, and the Order in which these are to

be applied to the transmission lines emanating from a particular Node (Bus), we next come down to

the final and the most important step of assigning/ correlating above gradings to actual transmission

lines emanating from a particular Node (Bus) as elucidated below:

General Logic: We know that a basic transmission line can be represented by its equivalent π-Model

as shown below:

Here, the parameters Series Resistance (R), Series Inductive Reactance (X), and Parallel Capacitive

Susceptance (B) define the transmission line under consideration. Since Over Voltage phenomenon

at a particular Node (Bus) is basically due to the Net Capacitive Vars (Q) contributed by the

transmission lines at that node, the fundamental logic to be followed to contain Over Voltage is

“Trip the lines in the descending order of their respective Net Capacitive Vars (Q) Contribution”

Annexure-VIII

3

The same logic holds good even when the transmission line contains line (shunt) reactors (shown as

X1 and X2 in the below figure), for their effect basically will be in reducing net Capacitive (Q) Vars.

It is pertinent to note at this juncture that bus reactors at a Node (Bus) will not have any effect on

OVR grading even though the same are installed for improving the general voltage profile at that

Node (Bus).

Qualified Logic: Since reality invariably differs from the theory, the above theoretically correct logic

has to be qualified by factoring in other significant factors like the typical power flow, and the

relative importance of that line to make it applicable under real time grid-operation as illustrated

below:

Say for example, from a generator node two lines of equal length [hence contributing equal

capacitive (Q) Vars] are emanating. However, these are to be given different gradings, for

tripping both the evacuating lines simultaneously does not make sense even though it is

theoretically correct.

Similarly, a line carrying more power and contributing more Capacitive (Q) Vars may have to

be tripped after another line carrying less power and contributing less Capacitive (Q) Vars

due to the criticality of former line in real time grid-operation.

Also due consideration needs to be given to avoid possible simultaneous tripping and to aid

possible recovery on tripping of a line.

Finally, any undue qualification (discretion) that might have crept in while applying above logic

should be taken care of/ brought down to minimum by making available the to-be-adopted OVR

gradings to all stakeholders for suggestions, and incorporating their comments/ observations

suitably.

OVR Grading of 765 kV Lines in the Southern Region

In line with Ramakrishna Committee guidelines, CBIP guidelines, and CEA Standards, the following

Voltage – Time grading matrix has been proposed to be adopted for OVR grading 765 kV

transmission lines of SR:

1. Voltage - Time (OVR) Grading Matrix:

Voltage Setting (% of Nominal

Voltage)

Time Setting

(Sec)

OVR Grading

Order of

Tripping

109 10 A 8

109 9 B 7

109 8 C 6

109 7 D 5

108 7 E 4

108 6 F 3

107 6 G 2

107 5 H 1

Annexure-VIII

4

2. OVR-Graded 765 kV Network of the Southern Region:

Unlike 400 kV network of SR, 765 kV network of SR consists of just 4 Nodes (Buses) and 8

transmission lines including two inter-regional lines compounded by sub-optimal development of

downstream network. Due to this, it has been observed that the Voltage at Kurnool-New and

Tiruvalam Substations is crossing 110 % of Nominal Voltage quite often. In this regard, a case for

using higher voltage settings (namely, 108%, 109% and 110%) may be considered for effective OVR

grading of these lines due to following reasons:

Standard Parameters of 800 kV Class Transmission System in India published by CEA specify

among other things that:

“Withstand capability of Auto-Transformers for 25% above rated voltage = 1 minute”

The above can also be corroborated from the typical Time-Voltage Curves for 765 kV Equipment:

The Overflux (V/f) setting of 765 kV class transformers being used by PGCIL is given as 110%, 60

sec for ALARM. Since ‘frequency’ essentially remains constant, it can be deduced by virtue of

above setting that the 765 kV transformers are capable of handling 110% of Nominal Voltage

quite safely for 10 sec.

Further, as the prevailing Over Voltage phenomenon in 765 kV network of SR being a temporary one

and would get eased with the coming up of planned downstream network in near future, use of

higher Voltage settings (108%, 109% and 110%) for OVR grading 765 kV lines is certainly in the

interest of Southern Grid.

*****

Annexure-VIII

5

Voltage Setting

(% of Nominal

Voltage)

Time Setting (Sec)OVR Grading

(NEW)Order of tripping

110 10 A 8

110 9 B 7

110 8 C 6

110 7 D 5

109 7 E 4

109 6 F 3

109 5 G 2

109 4 H 1

From Bus

NumberFrom Bus Name To Bus Number To Bus Name

Ckt

Id

Length,

km

Charging B

(pu)

Q' from Line

(B/2) [= Q1]

Q' from Line

Reactor

[= Q2]

Net 'Q' from

Line

[= Q1 + Q2]

Power Flow,

MW

Old OVR

Grading

Order as

per

Criticality

New OVR Grading

(to be adopted at

FROM BUS end)

414001 GOOTY 400.00 414010 KURNOOL 400.00 1 84.19 0.4695 0.23475 0 0.23475 -58.2 C1 5 C

414001 GOOTY 400.00 414023 NLR-PS 400.00 1 289 2.118 1.059 -0.5714 0.4876 -140.6 D2 6 B

414001 GOOTY 400.00 414023 NLR-PS 400.00 2 289 2.1183 1.05915 -0.5714 0.48775 -140.6 B2 3 E

414001 GOOTY 400.00 414031 KRNL-PG 400.00 1 112.5 0.62437 0.312185 -0.4535 -0.141315 -69 B1 7 A

414001 GOOTY 400.00 414032 GTYN-FSC 400.00 1 0 0 0 0 0 406.7 ** **

414001 GOOTY 400.00 414033 GTYS-FSC 400.00 1 0 0 0 -0.5714 -0.5714 342.7 ** **

414001 GOOTY 400.00 434008 TUMKUR 400.00 1 208.62 1.25589 0.627945 0 0.627945 0 A 2 F

414001 GOOTY 400.00 434008 TUMKUR 400.00 2 208.62 1.25589 0.627945 0 0.627945 D 1 G

414001 GOOTY 400.00 434009 RCHR-NEW 400.00 1 128.6 0.95104 0.47552 0 0.47552 -298.3 A 8 A

414001 GOOTY 400.00 434009 RCHR-NEW 400.00 2 128.6 0.95104 0.47552 0 0.47552 -298.3 B1 4 D

1. Voltage-Time (OVR) Grading Matrix:

2. OVR Grading for 400 kV Transmission Lines of the Southern Region:

Over Voltage Grading for 400 kV Lines of the Southern Region

Annexure-IX

1/15

414002 CHITOOR 400.00 414004 CHNKMPLY 400.00 1 147.14 0.81663 0.408315 0 0.408315 42.2 C2 2 E

414002 CHITOOR 400.00 414030 SDSTPS 400.00 1 189.07 1.38588 0.69294 0 0.69294 -362.4 D2 6 A

414002 CHITOOR 400.00 414030 SDSTPS 400.00 2 189.07 1.38588 0.69294 0 0.69294 -362.4 1 G

414002 CHITOOR 400.00 444001 SRPRMBDR 400.00 1 95.14 0.52803 0.264015 0 0.264015 159.2 B1 4 C

414002 CHITOOR 400.00 444024 TRVLM 400.00 1 21.02 0.15409 0.077045 0 0.077045 100.8 C 5 B

414002 CHITOOR 400.00 444024 TRVLM 400.00 2 21.02 0.15409 0.077045 0 0.077045 100.8 D 3 D

414003 NLR-PG 400.00 414008 NUNNA 400.00 1 340.64 1.89057 0.945285 -0.45351 0.491775 19.8 B2 4 D

414003 NLR-PG 400.00 414008 NUNNA 400.00 2 340.64 1.89057 0.945285 -0.45351 0.491775 19.8 A 2 F

414003 NLR-PG 400.00 414023 NLR-PS 400.00 1 6.35 0.04648 0.02324 0 0.02324 -793.7 A 8 A

414003 NLR-PG 400.00 414023 NLR-PS 400.00 2 6.35 0.04655 0.023275 0 0.023275 -793.7 A 6 B

414003 NLR-PG 400.00 444001 SRPRMBDR 400.00 1 189 1.04895 0.524475 0 0.524475 279.7 B2 5 C

414003 NLR-PG 400.00 444001 SRPRMBDR 400.00 2 189 1.04895 0.524475 0 0.524475 279.7 1 G

414003 NLR-PG 400.00 444024 TRVLM 400.00 1 172.96 1.2678 0.6339 -0.453 0.1809 308.1 D2 7 A

414003 NLR-PG 400.00 444024 TRVLM 400.00 2 172.96 1.2678 0.6339 -0.453 0.1809 308.1 C1 3 E

414004 CHNKMPLY 400.00 414005 CNP-FSC1 400.00 C 0 0 0 0 0 -79.3 ** **

414004 CHNKMPLY 400.00 414006 CNP-FSC2 400.00 C 0 0 0 0 0 -78.9 ** **

414004 CHNKMPLY 400.00 434010 KOLAR-PG 400.00 1 174 0.96611 0.483055 0 0.483055 154.5 B2 2 B

414004 CHNKMPLY 400.00 414002 CHITOOR 400.00 1 147.14 0.81663 0.408315 0 0.408315 -42.2 D 1 E

414005 CNP-FSC1 400.00 414007 TALPALLI 400.00 1 277.33 1.53915 0.769575 0 0.769575 -79.3 A 1 A

414005 CNP-FSC1 400.00 414004 CHNKMPLY 400.00 C 0 0 0 -0.4535 -0.4535 79.3 ** **

414006 CNP-FSC2 400.00 414007 TALPALLI 400.00 1 278.66 1.54659 0.773295 0 0.773295 -78.9 D 1 C

414006 CNP-FSC2 400.00 414004 CHNKMPLY 400.00 C 0 0 0 -0.4535 -0.4535 78.9 ** **

414007 TALPALLI 400.00 414031 KRNL-PG 400.00 1 264.5 1.46798 0.73399 -0.4535 0.28049 -51 D 3 F

414007 TALPALLI 400.00 424001 MAHBBNGR 400.00 1 184.53 1.02342 0.51171 -0.5714 -0.05969 29.6 C2 7 B

414007 TALPALLI 400.00 424002 RGM-NTPC 400.00 1 267.2 1.48296 0.74148 -0.4535 0.28798 -181.7 A 9 A

414007 TALPALLI 400.00 424002 RGM-NTPC 400.00 2 267.2 1.48296 0.74148 -0.4535 0.28798 -181.7 B2 5 D

414007 TALPALLI 400.00 424003 GHANAPUR 400.00 1 155.26 0.86172 0.43086 0 0.43086 98.3 A 4 E

414007 TALPALLI 400.00 424004 KHAMMAM 400.00 1 144.58 0.80242 0.40121 0 0.40121 -97.8 B2 8 B

414007 TALPALLI 400.00 424004 KHAMMAM 400.00 2 144.58 0.869384 0.434692 0 0.434692 -105.5 6 C

414007 TALPALLI 400.00 424004 KHAMMAM 400.00 3 144.58 0.869384 0.434692 0 0.434692 -105.5 2 G

414007 TALPALLI 400.00 414005 CNP-FSC1 400.00 1 277.33 1.53915 0.769575 0 0.769575 79.6 A 1 H

414007 TALPALLI 400.00 414006 CNP-FSC2 400.00 1 278.66 1.54659 0.773295 0 0.773295 79.2 D 10 A

414008 NUNNA 400.00 414009 GAZUWAKA 400.00 1 316.9 1.75879 0.879395 -0.5714 0.307995 -155.3 B1 10 B

414008 NUNNA 400.00 414013 VTS-IV 400.00 1 18.66 0.10315 0.051575 0 0.051575 252.7 B1 12 A

414008 NUNNA 400.00 414014 VEMAGIRI 400.00 1 192.34 0.13472 0.06736 0 0.06736 -153.8 A 9 B

Annexure-IX

2/15

414008 NUNNA 400.00 414014 VEMAGIRI 400.00 2 192.34 0.13472 0.06736 0 0.06736 -153.8 D 6 D

414008 NUNNA 400.00 414014 VEMAGIRI 400.00 3 195.21 1.08779 0.543895 -0.45351 0.090385 -99.3 C1 3 F

414008 NUNNA 400.00 414019 LANCO 400.00 1 22 0.1221 0.06105 0 0.06105 -164.8 B2 8 C

414008 NUNNA 400.00 414019 LANCO 400.00 2 22 0.1221 0.06105 0 0.06105 -164.8 C2 4 E

414008 NUNNA 400.00 414021 STNPLLI 400.00 1 115.89 0.69766 0.34883 0 0.34883 162.5 5 D

414008 NUNNA 400.00 414029 NLR-AP 400.00 1 348.2 1.93251 0.966255 0 0.966255 -19.4 1 H

414008 NUNNA 400.00 424004 KHAMMAM 400.00 1 114.78 0.637 0.3185 0 0.3185 104.3 C2 11 A

414008 NUNNA 400.00 414003 NLR-PG 400.00 1 340.64 1.89057 0.945285 -0.4535 0.491785 -19.8 A 7 C

414008 NUNNA 400.00 414003 NLR-PG 400.00 2 340.64 1.89057 0.945285 -0.4535 0.491785 -19.8 B2 2 G

414009 GAZUWAKA 400.00 414011 KALPAKKA 400.00 1 3.39 0.02061 0.010305 0 0.010305 61 A 4 B

414009 GAZUWAKA 400.00 414011 KALPAKKA 400.00 2 3.39 0.02061 0.010305 0 0.010305 61 B2 1 E

414009 GAZUWAKA 400.00 414020 SMHDRI-2 400.00 1 14.1 0.07825 0.039125 -0.57143 -0.532305 -71.5 A 5 A

414009 GAZUWAKA 400.00 414020 SMHDRI-2 400.00 2 14.1 0.07825 0.039125 -0.57143 -0.532305 -71.5 B2 2 D

414009 GAZUWAKA 400.00 414008 NUNNA 400.00 1 316.9 1.75879 0.879395 -0.5714 0.307995 156.8 B1 3 C

414010 KURNOOL 400.00 414031 KRNL-PG 400.00 1 9.88 0.07243 0.036215 0 0.036215 -379.4 A 5 A

414010 KURNOOL 400.00 414031 KRNL-PG 400.00 2 9.88 0.07243 0.036215 0 0.036215 -379.4 B1 3 C

414010 KURNOOL 400.00 424003 GHANAPUR 400.00 1 226.5 1.2571 0.62855 0 0.62855 114.4 D 1 E

414010 KURNOOL 400.00 424005 SRLMLB 400.00 1 104.9 0.5749 0.28745 0 0.28745 156.1 A 2 D

414010 KURNOOL 400.00 414001 GOOTY 400.00 1 84.19 0.4695 0.23475 0 0.23475 58.3 B1 4 B

414011 KALPAKKA 400.00 414012 SIMHADRI 400.00 1 3.72 0.02256 0.01128 0 0.01128 -360.3 A 12 A

414011 KALPAKKA 400.00 414012 SIMHADRI 400.00 2 3.72 0.02256 0.01128 0 0.01128 -360.3 B2 7 C

414011 KALPAKKA 400.00 414012 SIMHADRI 400.00 3 3.72 0.02256 0.01128 0 0.01128 -360.3 D 4 E

414011 KALPAKKA 400.00 414012 SIMHADRI 400.00 4 3.72 0.02256 0.01128 0 0.01128 -360.3 C1 2 G

414011 KALPAKKA 400.00 414014 VEMAGIRI 400.00 1 166.93 1.0124 0.5062 0 0.5062 200.4 A 10 B

414011 KALPAKKA 400.00 414014 VEMAGIRI 400.00 2 166.93 1.0124 0.5062 0 0.5062 200.4 D 1 H

414011 KALPAKKA 400.00 414027 HINDUJA 400.00 1 7.35 0.04425 0.022125 0 0.022125 0 A 8 C

414011 KALPAKKA 400.00 414027 HINDUJA 400.00 2 7.35 0.044247 0.0221235 0 0.0221235 0 B2 5 D

414011 KALPAKKA 400.00 424004 KHAMMAM 400.00 1 364 2.2076 1.1038 -0.5714 0.5324 186.4 A 11 A

414011 KALPAKKA 400.00 424004 KHAMMAM 400.00 2 364 2.2076 1.1038 -0.5714 0.5324 186.4 C1 3 F

414011 KALPAKKA 400.00 414009 GAZUWAKA 400.00 1 3.39 0.02061 0.010305 0 0.010305 -61 A 9 B

414011 KALPAKKA 400.00 414009 GAZUWAKA 400.00 2 3.39 0.02061 0.010305 0 0.010305 -61 B2 6 D

414012 SIMHADRI 400.00 414011 KALPAKKA 400.00 1 3.72 0.02256 0.01128 0 0.01128 360.4 A 4 A

414012 SIMHADRI 400.00 414011 KALPAKKA 400.00 2 3.72 0.02256 0.01128 0 0.01128 360.4 B2 3 B

414012 SIMHADRI 400.00 414011 KALPAKKA 400.00 3 3.72 0.02256 0.01128 0 0.01128 360.4 C1 2 C

414012 SIMHADRI 400.00 414011 KALPAKKA 400.00 4 3.72 0.02256 0.01128 0 0.01128 360.4 C2 1 D

Annexure-IX

3/15

414013 VTS-IV 400.00 414021 STNPLLI 400.00 1 115 0.63825 0.319125 0 0.319125 103.6 D2 5 B

414013 VTS-IV 400.00 414021 STNPLLI 400.00 2 115 0.63825 0.319125 0 0.319125 103.6 D 3 D

414013 VTS-IV 400.00 414029 NLR-AP 400.00 1 330.8 1.83594 0.91797 0 0.91797 -7.1 1 G

414013 VTS-IV 400.00 424011 MALKARAM 400.00 1 261.9 1.4529 0.72645 0 0.72645 297.4 D 2 E

414013 VTS-IV 400.00 424016 SURYAPET 400.00 1 130.95 0.72645 0.363225 0 0.363225 -141.2 4 C

414013 VTS-IV 400.00 414008 NUNNA 400.00 1 18.66 0.10315 0.051575 0 0.051575 -390.1 B1 6 A

414014 VEMAGIRI 400.00 414015 GMR 400.00 1 1.76 0.00973 0.004865 0 0.004865 -100 B2 9 C

414014 VEMAGIRI 400.00 414015 GMR 400.00 2 1.76 0.00973 0.004865 0 0.004865 -100 C2 6 D

414014 VEMAGIRI 400.00 414016 GAUTAMI 400.00 1 40 0.2764 0.1382 0 0.1382 -249.4 B2 10 B

414014 VEMAGIRI 400.00 414016 GAUTAMI 400.00 2 40 0.2764 0.1382 0 0.1382 D 3 F

414014 VEMAGIRI 400.00 414017 KONSEEMA 400.00 1 26.16 0.14462 0.07231 0 0.07231 B2 11 B

414014 VEMAGIRI 400.00 414017 KONSEEMA 400.00 2 26.16 0.14462 0.07231 0 0.07231 0 C2 4 E

414014 VEMAGIRI 400.00 414018 GVK-II 400.00 1 6.5 0.03593 0.017965 0 0.017965 A 12 B

414014 VEMAGIRI 400.00 414018 GVK-II 400.00 2 6.5 0.03593 0.017965 0 0.017965 0 B1 5 E

414014 VEMAGIRI 400.00 414020 SMHDRI-2 400.00 1 194.48 1.0796 0.5398 0 0.5398 -161.1 B2 15 A

414014 VEMAGIRI 400.00 414020 SMHDRI-2 400.00 2 194.48 1.0796 0.5398 0 0.5398 -161.1 C2 7 D

414014 VEMAGIRI 400.00 414021 STNPLLI 400.00 1 244.85 1.474 0.737 0 0.737 164.1 8 C

414014 VEMAGIRI 400.00 414008 NUNNA 400.00 1 192.34 0.13472 0.06736 0 0.06736 154.5 A 16 A

414014 VEMAGIRI 400.00 414008 NUNNA 400.00 2 192.34 0.13472 0.06736 0 0.06736 154.5 B2 13 A

414014 VEMAGIRI 400.00 414008 NUNNA 400.00 3 195.21 1.08779 0.543895 0 0.543895 99.7 C1 1 H

414014 VEMAGIRI 400.00 414011 KALPAKKA 400.00 1 166.93 1.0124 0.5062 0 0.5062 -198.9 A 14 A

414014 VEMAGIRI 400.00 414011 KALPAKKA 400.00 2 166.93 1.0124 0.5062 0 0.5062 -198.9 D 2 G

414015 GMR 400.00 414014 VEMAGIRI 400.00 1 1.76 0.00973 0.004865 0 0.004865 100 B2 2 B

414015 GMR 400.00 414014 VEMAGIRI 400.00 2 1.76 0.00973 0.004865 0 0.004865 100 C2 1 F

414016 GAUTAMI 400.00 414014 VEMAGIRI 400.00 1 40 0.2764 0.1382 0 0.1382 250 B2 2 B

414016 GAUTAMI 400.00 414014 VEMAGIRI 400.00 2 40 0.2764 0.1382 0 0.1382 D 1 F

414017 KONSEEMA 400.00 414014 VEMAGIRI 400.00 1 26.16 0.14462 0.07231 0 0.07231 B2 2 B

414017 KONSEEMA 400.00 414014 VEMAGIRI 400.00 2 26.16 0.14462 0.07231 0 0.07231 0 C2 1 F

414018 GVK-II 400.00 414014 VEMAGIRI 400.00 1 6.5 0.03593 0.017965 0 0.017965 B2 2 B

414018 GVK-II 400.00 414014 VEMAGIRI 400.00 2 6.5 0.03593 0.017965 0 0.017965 0 C2 1 F

414019 LANCO 400.00 414008 NUNNA 400.00 1 22 0.1221 0.06105 0 0.06105 165 B2 2 B

414019 LANCO 400.00 414008 NUNNA 400.00 2 22 0.1221 0.06105 0 0.06105 165 C2 1 F

414020 SMHDRI-2 400.00 414009 GAZUWAKA 400.00 1 14.1 0.07825 0.039125 0 0.039125 71.6 A 4 A

414020 SMHDRI-2 400.00 414009 GAZUWAKA 400.00 2 14.1 0.07825 0.039125 0 0.039125 71.6 B2 2 C

414020 SMHDRI-2 400.00 414014 VEMAGIRI 400.00 1 194.48 1.0796 0.5398 0 0.5398 162.2 B2 3 B

Annexure-IX

4/15

414020 SMHDRI-2 400.00 414014 VEMAGIRI 400.00 2 194.48 1.0796 0.5398 0 0.5398 162.2 D 1 D

414021 STNPLLI 400.00 424005 SRLMLB 400.00 1 160.65 0.8916 0.4458 0 0.4458 89.1 B1 4 C

414021 STNPLLI 400.00 424005 SRLMLB 400.00 2 160.65 0.8916 0.4458 0 0.4458 89.1 D 1 G

414021 STNPLLI 400.00 414008 NUNNA 400.00 1 115.89 0.69766 0.34883 0 0.34883 -161.9 5 B

414021 STNPLLI 400.00 414013 VTS-IV 400.00 1 115 0.63825 0.319125 0 0.319125 -111.4 A 6 A

414021 STNPLLI 400.00 414013 VTS-IV 400.00 2 115 0.63825 0.319125 0 0.319125 -111.4 C1 2 E

414021 STNPLLI 400.00 414014 VEMAGIRI 400.00 1 244.85 1.474 0.737 0 0.737 -162.9 3 D

414022 SMHPURI 400.00 414023 NLR-PS 400.00 1 26.88 0.19674 0.09837 0 0.09837 416.4 B2 1 C

414022 SMHPURI 400.00 414026 MNAKSHI 400.00 1 5 0.03698 0.01849 0 0.01849 123.6 A 2 A

414023 NLR-PS 400.00 414026 MNAKSHI 400.00 1 26.88 0.197 0.0985 0 0.0985 -393.1 C2 4 E

414023 NLR-PS 400.00 414034 THPTECH 400.00 1 32.5 0.2379 0.11895 0 0.11895 -592.8 9 A

414023 NLR-PS 400.00 414034 THPTECH 400.00 2 32.5 0.2379 0.11895 0 0.11895 -592.8 8 B

414023 NLR-PS 400.00 414035 NCC 400.00 1 33 0.24156 0.12078 0 0.12078 0 5 D

414023 NLR-PS 400.00 414035 NCC 400.00 2 33 0.24156 0.12078 0 0.12078 0 3 F

414023 NLR-PS 400.00 414001 GOOTY 400.00 1 289 2.118 1.059 -0.4535 0.6055 158.9 D 2 G

414023 NLR-PS 400.00 414001 GOOTY 400.00 2 289 2.1183 1.05915 -0.4535 0.60565 158.9 C2 1 H

414023 NLR-PS 400.00 414003 NLR-PG 400.00 1 6.35 0.04648 0.02324 0 0.02324 812.1 A 10 A

414023 NLR-PS 400.00 414003 NLR-PG 400.00 2 6.35 0.04655 0.023275 0 0.023275 812.1 A 7 B

414023 NLR-PS 400.00 414022 SMHPURI 400.00 1 26.88 0.19674 0.09837 0 0.09837 -416 B2 6 C

414026 MNAKSHI 400.00 414022 SMHPURI 400.00 1 5 0.03698 0.01849 0 0.01849 -123.5 A 2 A

414026 MNAKSHI 400.00 414023 NLR-PS 400.00 1 26.88 0.197 0.0985 0 0.0985 393.5 C2 1 C

414027 HINDUJA 400.00 414011 KALPAKKA 400.00 1 7.35 0.04425 0.022125 0 0.022125 0 A 3 A

414027 HINDUJA 400.00 414011 KALPAKKA 400.00 2 7.35 0.044247 0.0221235 0 0.0221235 0 C2 1 D

414027 HINDUJA 400.00 414014 VEMAGIRI 400.00 1 40 0.222 0.111 0 0.111 B1 2 B

414029 NLR-AP 400.00 414030 SDSTPS 400.00 1 68.1 0.49917 0.249585 0 0.249585 -259.9 A 4 A

414029 NLR-AP 400.00 414030 SDSTPS 400.00 2 68.1 0.49917 0.249585 0 0.249585 -259.9 3 B

414029 NLR-AP 400.00 414008 NUNNA 400.00 1 348.2 1.93251 0.966255 -0.5714 0.394855 19.4 1 E

414029 NLR-AP 400.00 414013 VTS-IV 400.00 1 330.8 1.83594 0.91797 -0.5714 0.34657 34.5 2 D

414030 SDSTPS 400.00 414002 CHITOOR 400.00 1 189.07 1.38588 0.69294 0 0.69294 364.7 C1 4 A

414030 SDSTPS 400.00 414002 CHITOOR 400.00 2 189.07 1.38588 0.69294 0 0.69294 364.7 1 E

414030 SDSTPS 400.00 414029 NLR-AP 400.00 1 68.1 0.49917 0.249585 0 0.249585 260.3 A 3 B

414030 SDSTPS 400.00 414029 NLR-AP 400.00 2 68.1 0.49917 0.249585 0 0.249585 260.3 2 D

414031 KRNL-PG 400.00 414001 GOOTY 400.00 1 112.5 0.62437 0.312185 0 0.312185 69.1 C1 2 C

414031 KRNL-PG 400.00 414007 TALPALLI 400.00 1 264.5 1.46798 0.73399 0 0.73399 51.1 B2 1 D

414031 KRNL-PG 400.00 414010 KURNOOL 400.00 1 9.88 0.07243 0.036215 0 0.036215 379.5 A 4 A

Annexure-IX

5/15

414031 KRNL-PG 400.00 414010 KURNOOL 400.00 2 9.88 0.07243 0.036215 0 0.036215 379.5 B1 3 B

414032 GTYN-FSC 400.00 434004 NLMMGLA 400.00 1 256.13 1.42152 0.71076 0 0.71076 406.7 A 1 A

414032 GTYN-FSC 400.00 414001 GOOTY 400.00 1 0 0 0 0 0 -406.7 ** **

414033 GTYS-FSC 400.00 434005 SMNHLLY 400.00 1 301 1.6705 0.83525 0 0.83525 342.7 C1 1 C

414033 GTYS-FSC 400.00 414001 GOOTY 400.00 1 0 0 0 0 0 -342.7 ** **

414034 THPTECH 400.00 414023 NLR-PS 400.00 1 32.5 0.2379 0.11895 0 0.11895 643.4 2 A

414034 THPTECH 400.00 414023 NLR-PS 400.00 2 32.5 0.2379 0.11895 0 0.11895 643.4 1 C

414035 NCC 400.00 414023 NLR-PS 400.00 1 33 0.24156 0.12078 0 0.12078 544.5 2 B

414035 NCC 400.00 414023 NLR-PS 400.00 2 33 0.24156 0.12078 0 0.12078 544.5 1 D

424001 MAHBBNGR 400.00 434006 RCHR-TPS 400.00 1 73.68 0.40892 0.20446 0 0.20446 -506.5 D 2 B

424001 MAHBBNGR 400.00 414007 TALPALLI 400.00 1 184.53 1.02342 0.51171 0 0.51171 -29.4 B1 1 E

424002 RGM-NTPC 400.00 424003 GHANAPUR 400.00 1 201.25 1.11694 0.55847 0 0.55847 315.7 A 9 A

424002 RGM-NTPC 400.00 424003 GHANAPUR 400.00 2 201.25 1.11694 0.55847 0 0.55847 315.7 D 1 H

424002 RGM-NTPC 400.00 424007 DICHIPLY 400.00 1 147.98 0.82139 0.410695 0 0.410695 285.4 C2 4 E

424002 RGM-NTPC 400.00 424008 GAJWEL 400.00 1 135 0.74924 0.37462 0 0.37462 446.5 B1 5 D

424002 RGM-NTPC 400.00 424010 WARANGAL 400.00 1 98.8 0.54836 0.27418 0 0.27418 314.5 D 6 C

424002 RGM-NTPC 400.00 424011 MALKARAM 400.00 2 194 1.0724 0.5362 0 0.5362 340.1 B2 2 G

424002 RGM-NTPC 400.00 424014 BDRAWATHI 400.00 1 177.61 0.98571 0.492855 0 0.492855 -488.9 B2 10 A

424002 RGM-NTPC 400.00 424014 BDRAWATHI 400.00 2 177.61 0.98571 0.492855 0 0.492855 -488.9 A 8 B

424002 RGM-NTPC 400.00 414007 TALPALLI 400.00 1 267.2 1.48296 0.74148 -0.4535 0.28798 183.5 A 7 B

424002 RGM-NTPC 400.00 414007 TALPALLI 400.00 2 267.2 1.48296 0.74148 -0.4535 0.28798 183.5 B2 3 F

424003 GHANAPUR 400.00 424006 MMDPALLI 400.00 1 46 0.2553 0.12765 0 0.12765 248.5 B1 6 A

424003 GHANAPUR 400.00 424008 GAJWEL 400.00 1 72.95 0.40403 0.202015 -0.45351 -0.251495 -53.6 C1 3 D

424003 GHANAPUR 400.00 424011 MALKARAM 400.00 1 54.9 0.31111 0.155555 -0.4535 -0.297945 26.5 C2 2 E

424003 GHANAPUR 400.00 414007 TALPALLI 400.00 1 155.26 0.86172 0.43086 0 0.43086 -98 A 4 C

424003 GHANAPUR 400.00 414010 KURNOOL 400.00 1 226.5 1.2571 0.62855 0 0.62855 -113.9 D 1 G

424003 GHANAPUR 400.00 424002 RGM-NTPC 400.00 1 201.25 1.11694 0.55847 0 0.55847 -312 A 7 A

424003 GHANAPUR 400.00 424002 RGM-NTPC 400.00 2 201.25 1.11694 0.55847 0 0.55847 -312 B2 5 B

424004 KHAMMAM 400.00 424006 MMDPALLI 400.00 1 198 1.2008 0.6004 0 0.6004 228.9 C1 8 B

424004 KHAMMAM 400.00 424006 MMDPALLI 400.00 2 198 1.2008 0.6004 0 0.6004 228.9 D2 1 H

424004 KHAMMAM 400.00 424010 WARANGAL 400.00 1 117.09 0.64985 0.324925 -0.4535 -0.128575 -32 B2 5 D

424004 KHAMMAM 400.00 424012 KTPS 400.00 1 67.76 0.37606 0.18803 0 0.18803 -224.9 B2 11 A

424004 KHAMMAM 400.00 424012 KTPS 400.00 2 67.76 0.37606 0.18803 0 0.18803 -224.9 C2 7 C

424004 KHAMMAM 400.00 414007 TALPALLI 400.00 1 144.58 0.80242 0.40121 0 0.40121 98 A 10 A

424004 KHAMMAM 400.00 414007 TALPALLI 400.00 2 144.58 0.869384 0.434692 0 0.434692 105.8 6 C

Annexure-IX

6/15

424004 KHAMMAM 400.00 414007 TALPALLI 400.00 3 144.58 0.869384 0.434692 0 0.434692 105.8 2 G

424004 KHAMMAM 400.00 414008 NUNNA 400.00 1 114.78 0.637 0.3185 0 0.3185 -104 D 4 E

424004 KHAMMAM 400.00 414011 KALPAKKA 400.00 1 364 2.2076 1.1038 -0.5714 0.5324 -183.9 A 9 B

424004 KHAMMAM 400.00 414011 KALPAKKA 400.00 2 364 2.2076 1.1038 -0.5714 0.5324 -183.9 C1 3 F

424005 SRLMLB 400.00 424006 MMDPALLI 400.00 1 147 0.8126 0.4063 0 0.4063 151.8 B1 3 C

424005 SRLMLB 400.00 424013 SNKRPLLI 400.00 1 128.5 0.71323 0.356615 0 0.356615 181.5 5 A

424005 SRLMLB 400.00 414010 KURNOOL 400.00 1 104.9 0.5749 0.28745 0 0.28745 -155.6 D 2 D

424005 SRLMLB 400.00 414021 STNPLLI 400.00 1 160.65 0.8916 0.4458 0 0.4458 -88.8 B1 4 B

424005 SRLMLB 400.00 414021 STNPLLI 400.00 2 160.65 0.8916 0.4458 0 0.4458 -88.8 D2 1 E

424006 MMDPALLI 400.00 424003 GHANAPUR 400.00 1 46 0.2553 0.12765 0 0.12765 -248 B1 4 A

424006 MMDPALLI 400.00 424004 KHAMMAM 400.00 1 198 1.2008 0.6004 0 0.6004 -226.9 C1 3 B

424006 MMDPALLI 400.00 424004 KHAMMAM 400.00 2 198 1.2008 0.6004 0 0.6004 -226.9 D 1 D

424006 MMDPALLI 400.00 424005 SRLMLB 400.00 1 147 0.8126 0.4063 0 0.4063 -151.1 B1 2 C

424007 DICHIPLY 400.00 424002 RGM-NTPC 400.00 1 147.98 0.82139 0.410695 0 0.410695 -283.2 C1 1 C

424008 GAJWEL 400.00 424009 KKTYATPS 400.00 1 131 0.72705 0.363525 0 0.363525 -216.6 A 7 A

424008 GAJWEL 400.00 424009 KKTYATPS 400.00 2 131 0.72705 0.363525 0 0.363525 -216.6 C1 3 E

424008 GAJWEL 400.00 424013 SNKRPLLI 400.00 1 105 0.58275 0.291375 0 0.291375 159.7 D 6 B

424008 GAJWEL 400.00 424013 SNKRPLLI 400.00 2 105 0.58275 0.291375 0 0.291375 159.7 C1 2 F

424008 GAJWEL 400.00 424015 JAIPUR 400.00 1 163.242 1.19656 0.59828 0 0.59828 0.1 4 D

424008 GAJWEL 400.00 424015 JAIPUR 400.00 2 163.242 1.19656 0.59828 0 0.59828 0.1 1 G

424008 GAJWEL 400.00 424002 RGM-NTPC 400.00 1 135 0.74924 0.37462 0 0.37462 -441.3 B1 8 B

424008 GAJWEL 400.00 424003 GHANAPUR 400.00 1 72.95 0.40403 0.202015 0 0.202015 53.6 A 5 C

424009 KKTYATPS 400.00 424010 WARANGAL 400.00 1 46 0.27647 0.138235 0 0.138235 -13.8 A 4 A

424009 KKTYATPS 400.00 424010 WARANGAL 400.00 2 46 0.27647 0.138235 0 0.138235 -13.8 C2 2 C

424009 KKTYATPS 400.00 424008 GAJWEL 400.00 1 131 0.72705 0.363525 0 0.363525 217.8 A 3 B

424009 KKTYATPS 400.00 424008 GAJWEL 400.00 2 131 0.72705 0.363525 0 0.363525 217.8 D 1 E

424010 WARANGAL 400.00 424002 RGM-NTPC 400.00 1 98.8 0.54836 0.27418 -0.4535 -0.17932 -312.6 C1 3 B

424010 WARANGAL 400.00 424004 KHAMMAM 400.00 1 117.09 0.64985 0.324925 0 0.324925 32 B2 1 D

424010 WARANGAL 400.00 424009 KKTYATPS 400.00 1 46 0.27647 0.138235 0 0.138235 13.8 B1 4 A

424010 WARANGAL 400.00 424009 KKTYATPS 400.00 2 46 0.27647 0.138235 0 0.138235 13.8 C1 2 C

424011 MALKARAM 400.00 414013 VTS-IV 400.00 1 261.9 1.4529 0.72645 0 0.72645 -295.4 B1 1 E

424011 MALKARAM 400.00 424016 SURYAPET 400.00 1 135.559 0.816065 0.4080325 0 0.4080325 -140.6 2 C

424011 MALKARAM 400.00 424002 RGM-NTPC 400.00 2 194 1.0724 0.5362 0 0.5362 -314.6 B2 4 A

424011 MALKARAM 400.00 424003 GHANAPUR 400.00 1 54.9 0.31111 0.155555 0 0.155555 30.9 C2 3 B

424012 KTPS 400.00 424004 KHAMMAM 400.00 1 67.76 0.37606 0.18803 0 0.18803 225.6 B2 2 A

Annexure-IX

7/15

424012 KTPS 400.00 424004 KHAMMAM 400.00 2 67.76 0.37606 0.18803 0 0.18803 225.6 C2 1 C

424013 SNKRPLLI 400.00 424005 SRLMLB 400.00 1 128.5 0.71323 0.356615 0 0.356615 -180.7 2 C

424013 SNKRPLLI 400.00 424006 MMDPALLI 400.00 1 17.8 0.09884 0.04942 0 0.04942 -74.7 4 A

424013 SNKRPLLI 400.00 424008 GAJWEL 400.00 1 105 0.58275 0.291375 0 0.291375 -159.2 B1 3 B

424013 SNKRPLLI 400.00 424008 GAJWEL 400.00 2 105 0.58275 0.291375 0 0.291375 -159.2 D 1 D

424014 BDRAWATHI 400.00 424002 RGM-NTPC 400.00 1 177.61 0.98571 0.492855 0 0.492855 497 A 2 A

424014 BDRAWATHI 400.00 424002 RGM-NTPC 400.00 2 177.61 0.98571 0.492855 0 0.492855 497 C2 1 C

424015 JAIPUR 400.00 424008 GAJWEL 400.00 1 163.242 1.19656 0.59828 0 0.59828 0 2 B

424015 JAIPUR 400.00 424008 GAJWEL 400.00 2 163.242 1.19656 0.59828 0 0.59828 0 1 D

424016 SURYAPET 400.00 414013 VTS-IV 400.00 1 130.95 0.72645 0.363225 0 0.363225 -141.2 2 C

424016 SURYAPET 400.00 424011 MALKARAM 400.00 1 135.559 0.816065 0.4080325 0 0.4080325 141.2 1 A

434003 HOODY 400.00 434004 NLMMGLA 400.00 1 45 0.24975 0.124875 0 0.124875 54.6 B2 3 B

434003 HOODY 400.00 434004 NLMMGLA 400.00 2 45 0.24975 0.124875 0 0.124875 54.6 B2 1 D

434003 HOODY 400.00 434010 KOLAR-PG 400.00 1 51.07 0.3811 0.19055 0 0.19055 -460.3 C1 4 A

434003 HOODY 400.00 434010 KOLAR-PG 400.00 2 51.07 0.3811 0.19055 0 0.19055 -460.3 A 2 C

434004 NLMMGLA 400.00 434007 BIDADI 400.00 1 34.75 0.19286 0.09643 0 0.09643 186 B2 9 B

434004 NLMMGLA 400.00 434007 BIDADI 400.00 2 34.75 0.19286 0.09643 0 0.09643 186 A 5 D

434004 NLMMGLA 400.00 434013 HASSAN 400.00 1 265 1.47075 0.735375 0 0.735375 -41.8 A 3 F

434004 NLMMGLA 400.00 434018 TALAGUPA 400.00 1 354 1.96469 0.982345 0 0.982345 -178.3 D 1 H

434004 NLMMGLA 400.00 434019 HIRIYUR 400.00 1 160 0.888 0.444 0 0.444 -409.8 B2 11 A

434004 NLMMGLA 400.00 434019 HIRIYUR 400.00 2 160 0.888 0.444 0 0.444 -409.8 A 8 B

434004 NLMMGLA 400.00 434020 MYSORE 400.00 1 132.9 0.73758 0.36879 0 0.36879 100.3 C1 6 C

434004 NLMMGLA 400.00 434020 MYSORE 400.00 2 132.9 0.73758 0.36879 0 0.36879 100.3 B1 2 G

434004 NLMMGLA 400.00 414032 GTYN-FSC 400.00 1 256.13 1.42152 0.71076 -0.4535 0.25726 -398.5 A 10 A

434004 NLMMGLA 400.00 434003 HOODY 400.00 1 45 0.24975 0.124875 0 0.124875 -54.5 C2 7 C

434004 NLMMGLA 400.00 434003 HOODY 400.00 2 45 0.24975 0.124875 0 0.124875 -54.5 B2 4 E

434005 SMNHLLY 400.00 434007 BIDADI 400.00 1 16.97 0.09418 0.04709 0 0.04709 8.7 C1 4 B

434005 SMNHLLY 400.00 434007 BIDADI 400.00 2 16.97 0.09418 0.04709 0 0.04709 8.7 A 3 C

434005 SMNHLLY 400.00 434010 KOLAR-PG 400.00 1 97.39 0.54052 0.27026 -0.4535 -0.18324 -270.7 A 5 A

434005 SMNHLLY 400.00 444006 HOSUR 400.00 1 79.75 0.44265 0.221325 0 0.221325 -12.9 A 1 E

434005 SMNHLLY 400.00 414033 GTYS-FSC 400.00 1 301 1.6705 0.83525 -0.5714 0.26385 -335.8 D2 2 D

434006 RCHR-TPS 400.00 434009 RCHR-NEW 400.00 1 22.3 0.16465 0.082325 0 0.082325 -181.1 B1 4 B

434006 RCHR-TPS 400.00 434009 RCHR-NEW 400.00 2 22.3 0.16465 0.082325 0 0.082325 -181.1 A 2 D

434006 RCHR-TPS 400.00 434025 YTPS 400.00 1 2.5 0.01505 0.007525 0 0.007525 -60 5 A

434006 RCHR-TPS 400.00 434016 MUNRABAD 400.00 1 172.45 0.95707 0.478535 0 0.478535 206.5 D 1 E

Annexure-IX

8/15

434006 RCHR-TPS 400.00 424001 MAHBBNGR 400.00 1 73.68 0.40892 0.20446 0 0.20446 493.1 C2 3 C

434007 BIDADI 400.00 434004 NLMMGLA 400.00 1 34.75 0.19286 0.09643 0 0.09643 -185.6 D 3 B

434007 BIDADI 400.00 434004 NLMMGLA 400.00 2 34.75 0.19286 0.09643 0 0.09643 -185.6 A 1 D

434007 BIDADI 400.00 434005 SMNHLLY 400.00 1 16.97 0.09418 0.04709 0 0.04709 -8.7 C2 4 A

434007 BIDADI 400.00 434005 SMNHLLY 400.00 2 16.97 0.09418 0.04709 0 0.04709 -8.7 A 2 C

434008 TUMKUR 400.00 414001 GOOTY 400.00 1 208.62 1.25589 0.627945 0 0.627945 0 B1 2 B

434008 TUMKUR 400.00 414001 GOOTY 400.00 2 208.62 1.25589 0.627945 0 0.627945 D 1 D

434009 RCHR-NEW 400.00 414001 GOOTY 400.00 1 128.6 0.95104 0.47552 0 0.47552 299.4 D 3 B

434009 RCHR-NEW 400.00 414001 GOOTY 400.00 2 128.6 0.95104 0.47552 0 0.47552 299.4 A 1 E

434009 RCHR-NEW 400.00 434006 RCHR-TPS 400.00 1 22.3 0.16465 0.082325 0 0.082325 81.2 A 4 A

434009 RCHR-NEW 400.00 434006 RCHR-TPS 400.00 2 22.3 0.16465 0.082325 0 0.082325 81.2 C2 2 C

434010 KOLAR-PG 400.00 444006 HOSUR 400.00 1 69 0.38295 0.191475 0 0.191475 374.8 A 7 A

434010 KOLAR-PG 400.00 444006 HOSUR 400.00 2 69 0.38295 0.191475 0 0.191475 374.8 B2 5 B

434010 KOLAR-PG 400.00 444024 TRVLM 400.00 1 153.19 0.8502 0.4251 0 0.4251 -202.1 D2 3 D

434010 KOLAR-PG 400.00 414004 CHNKMPLY 400.00 1 174 0.96611 0.483055 0 0.483055 -153.7 B2 1 G

434010 KOLAR-PG 400.00 434003 HOODY 400.00 1 51.07 0.3811 0.19055 0 0.19055 461.6 C2 6 A

434010 KOLAR-PG 400.00 434003 HOODY 400.00 2 51.07 0.3811 0.19055 0 0.19055 461.6 B2 4 C

434010 KOLAR-PG 400.00 434005 SMNHLLY 400.00 1 97.39 0.54052 0.27026 0 0.27026 272.6 A 2 E

434011 BTPS 400.00 434014 JINDAL 400.00 1 8 0.04399 0.021995 0 0.021995 -331.6 A 4 A

434011 BTPS 400.00 434019 HIRIYUR 400.00 1 156 0.8658 0.4329 0 0.4329 415.5 C2 3 B

434011 BTPS 400.00 434019 HIRIYUR 400.00 2 156 0.8658 0.4329 0 0.4329 415.5 B2 1 D

434011 BTPS 400.00 434025 YTPS 400.00 1 155 0.86025 0.430125 0 0.430125 60.2 B1 2 C

434012 GUTTUR 400.00 434014 JINDAL 400.00 1 142.5 0.78355 0.391775 0 0.391775 -322.5 A 8 A

434012 GUTTUR 400.00 434015 KAIGA 400.00 1 163 0.90465 0.452325 0 0.452325 -136.1 C1 6 B

434012 GUTTUR 400.00 434015 KAIGA 400.00 2 163 0.90462 0.45231 0 0.45231 -136.2 D 4 D

434012 GUTTUR 400.00 434016 MUNRABAD 400.00 1 118.3 0.65656 0.32828 0 0.32828 1.1 C2 2 F

434012 GUTTUR 400.00 434017 NARENDRA 400.00 1 156.5 0.8769 0.43845 0 0.43845 -33 D 3 E

434012 GUTTUR 400.00 434017 NARENDRA 400.00 2 156.5 0.8769 0.43845 0 0.43845 -33 C2 1 G

434012 GUTTUR 400.00 434019 HIRIYUR 400.00 1 100 0.555 0.2775 0 0.2775 194.6 B1 7 A

434012 GUTTUR 400.00 434019 HIRIYUR 400.00 2 100 0.555 0.2775 0 0.2775 194.6 C1 5 C

434013 HASSAN 400.00 434018 TALAGUPA 400.00 1 260 1.443 0.7215 0 0.7215 -205.5 C2 2 E

434013 HASSAN 400.00 434020 MYSORE 400.00 1 97 0.5383 0.26915 0 0.26915 237.4 D 5 B

434013 HASSAN 400.00 434020 MYSORE 400.00 2 97 0.5383 0.26915 0 0.26915 237.4 A 3 D

434013 HASSAN 400.00 434021 UPCL 400.00 1 178 1.31657 0.658285 0 0.658285 -291.1 A 6 A

434013 HASSAN 400.00 434021 UPCL 400.00 2 178 1.31657 0.658285 0 0.658285 -291.1 B1 4 C

Annexure-IX

9/15

434013 HASSAN 400.00 434004 NLMMGLA 400.00 1 265 1.47075 0.735375 0 0.735375 41.7 D2 1 G

434014 JINDAL 400.00 434011 BTPS 400.00 1 8 0.04399 0.021995 0 0.021995 421.3 A 2 C

434014 JINDAL 400.00 434012 GUTTUR 400.00 1 142.5 0.78355 0.391775 0 0.391775 325.3 C2 1 A

434015 KAIGA 400.00 434017 NARENDRA 400.00 1 107 0.61044 0.30522 0 0.30522 160.1 D 4 A

434015 KAIGA 400.00 434017 NARENDRA 400.00 2 107 0.61044 0.30522 0 0.30522 160.1 B2 2 C

434015 KAIGA 400.00 434012 GUTTUR 400.00 1 163 0.90465 0.452325 0 0.452325 136.7 C1 3 B

434015 KAIGA 400.00 434012 GUTTUR 400.00 2 163 0.90462 0.45231 0 0.45231 136.8 D 1 E

434016 MUNRABAD 400.00 434006 RCHR-TPS 400.00 1 172.45 0.95707 0.478535 -0.5714 -0.092865 -90.3 C2 2 B

434016 MUNRABAD 400.00 434012 GUTTUR 400.00 1 118.3 0.65656 0.32828 0 0.32828 -1.1 D 1 D

434017 NARENDRA 400.00 434023 NARENDRA-NEW400.00 1 176.13 1.29105 0.645525 0 0.645525 20.2 3 D

434017 NARENDRA 400.00 434023 NARENDRA-NEW400.00 2 176.13 1.29105 0.645525 0 0.645525 20.2 1 G

434017 NARENDRA 400.00 434012 GUTTUR 400.00 1 156.5 0.8769 0.43845 0 0.43845 33 D 5 B

434017 NARENDRA 400.00 434012 GUTTUR 400.00 2 156.5 0.8769 0.43845 0 0.43845 33 C2 2 E

434017 NARENDRA 400.00 434015 KAIGA 400.00 1 107 0.61044 0.30522 0 0.30522 -159.6 D 6 A

434017 NARENDRA 400.00 434015 KAIGA 400.00 2 107 0.61044 0.30522 0 0.30522 -159.6 B2 4 C

434018 TALAGUPA 400.00 434004 NLMMGLA 400.00 1 354 1.96469 0.982345 0 0.982345 179.1 D 1 D

434018 TALAGUPA 400.00 434013 HASSAN 400.00 1 260 1.443 0.7215 0 0.7215 206.7 C2 2 B

434019 HIRIYUR 400.00 434004 NLMMGLA 400.00 1 160 0.888 0.444 0 0.444 416.4 A 6 A

434019 HIRIYUR 400.00 434004 NLMMGLA 400.00 2 160 0.888 0.444 0 0.444 416.4 B2 3 D

434019 HIRIYUR 400.00 434011 BTPS 400.00 1 156 0.8658 0.4329 0 0.4329 -366.6 A 5 B

434019 HIRIYUR 400.00 434011 BTPS 400.00 2 156 0.8658 0.4329 0 0.4329 -366.6 B2 2 E

434019 HIRIYUR 400.00 434012 GUTTUR 400.00 1 100 0.555 0.2775 0 0.2775 -194.2 B1 4 C

434019 HIRIYUR 400.00 434012 GUTTUR 400.00 2 100 0.555 0.2775 0 0.2775 -194.2 D 1 G

434020 MYSORE 400.00 454008 KOZKODE 400.00 1 203 1.12667 0.563335 0 0.563335 125.6 A 4 C

434020 MYSORE 400.00 454008 KOZKODE 400.00 2 203 1.12667 0.563335 0 0.563335 125.6 D 1 G

434020 MYSORE 400.00 434004 NLMMGLA 400.00 1 132.9 0.73758 0.36879 0 0.36879 -100.3 B1 5 B

434020 MYSORE 400.00 434004 NLMMGLA 400.00 2 132.9 0.73758 0.36879 0 0.36879 -100.3 D 2 E

434020 MYSORE 400.00 434013 HASSAN 400.00 1 97 0.5383 0.26915 0 0.26915 -236.3 D 6 A

434020 MYSORE 400.00 434013 HASSAN 400.00 2 97 0.5383 0.26915 0 0.26915 -236.3 A 3 D

434021 UPCL 400.00 434013 HASSAN 400.00 1 178 1.31657 0.658285 0 0.658285 292.5 A 2 A

434021 UPCL 400.00 434013 HASSAN 400.00 2 178 1.31657 0.658285 0 0.658285 292.5 B2 1 C

434023 NARENDRA-NEW400.00 434024 KUDGI-NTPC 400.00 1 8.8 0.06448 0.03224 0 0.03224 0 8 A

434023 NARENDRA-NEW400.00 434024 KUDGI-NTPC 400.00 2 8.8 0.06448 0.03224 0 0.03224 5 C

434023 NARENDRA-NEW400.00 434024 KUDGI-NTPC 400.00 3 8.8 0.06448 0.03224 0 0.03224 4 D

434023 NARENDRA-NEW400.00 434024 KUDGI-NTPC 400.00 4 8.8 0.06448 0.03224 0 0.03224 3 E

Annexure-IX

10/15

434023 NARENDRA-NEW400.00 334058 KOLHAPUR-PG 400.00 1 191.17 1.36721 0.683605 0 0.683605 20.1 6 B

434023 NARENDRA-NEW400.00 334058 KOLHAPUR-PG 400.00 2 191.17 1.36721 0.683605 0 0.683605 20.1 1 G

434023 NARENDRA-NEW400.00 434017 NARENDRA 400.00 1 176.13 1.29105 0.645525 0 0.645525 -20.2 7 A

434023 NARENDRA-NEW400.00 434017 NARENDRA 400.00 2 176.13 1.29105 0.645525 0 0.645525 -20.2 2 F

434024 KUDGI-NTPC 400.00 434023 NARENDRA-NEW400.00 1 8.8 0.06448 0.03224 0 0.03224 0 4 A

434024 KUDGI-NTPC 400.00 434023 NARENDRA-NEW400.00 2 8.8 0.06448 0.03224 0 0.03224 3 B

434024 KUDGI-NTPC 400.00 434023 NARENDRA-NEW400.00 3 8.8 0.06448 0.03224 0 0.03224 2 C

434024 KUDGI-NTPC 400.00 434023 NARENDRA-NEW400.00 4 8.8 0.06448 0.03224 0 0.03224 1 D

434025 YTPS 400.00 434006 RCHR-TPS 400.00 1 2.5 0.01505 0.007525 0 0.007525 60 2 B

434025 YTPS 400.00 434011 BTPS 400.00 1 155 0.86025 0.430125 0 0.430125 -60 1 D

444001 SRPRMBDR 400.00 444018 SVCHTRM 400.00 1 17.9 0.00702 0.00351 0 0.00351 -267.2 A 5 A

444001 SRPRMBDR 400.00 444024 TRVLM 400.00 1 85.04 0.47197 0.235985 0 0.235985 -158.7 C1 4 B

444001 SRPRMBDR 400.00 414002 CHITOOR 400.00 1 95.14 0.52803 0.264015 0 0.264015 -158.4 D2 2 D

444001 SRPRMBDR 400.00 414003 NLR-PG 400.00 1 189 1.04895 0.524475 0 0.524475 -276.9 C2 3 C

444001 SRPRMBDR 400.00 414003 NLR-PG 400.00 2 189 1.04895 0.524475 0 0.524475 -276.9 1 E

444002 ALAMATTY 400.00 444018 SVCHTRM 400.00 1 94 0.5217 0.26085 0 0.26085 126.4 D 6 B

444002 ALAMATTY 400.00 444018 SVCHTRM 400.00 2 94 0.5217 0.26085 0 0.26085 126.4 B1 2 F

444002 ALAMATTY 400.00 444019 VALLUR 400.00 1 37.32 0.20535 0.102675 0 0.102675 -463.4 A 8 A

444002 ALAMATTY 400.00 444019 VALLUR 400.00 2 37.32 0.20535 0.102675 0 0.102675 -463.4 C2 5 C

444002 ALAMATTY 400.00 444022 NCTPS-II 400.00 1 84 0.4662 0.2331 0 0.2331 -216.8 A 7 A

444002 ALAMATTY 400.00 444022 NCTPS-II 400.00 2 84 0.4662 0.2331 0 0.2331 -216.8 C1 3 E

444002 ALAMATTY 400.00 444031 TRVLM-TN 400.00 1 112.3 0.67605 0.338025 0 0.338025 50.4 4 D

444002 ALAMATTY 400.00 444031 TRVLM-TN 400.00 2 112.3 0.67605 0.338025 0 0.338025 50.4 1 G

444003 SALEM 400.00 444004 MYWADI 400.00 1 150.4 0.83551 0.417755 0 0.417755 136.7 A 4 C

444003 SALEM 400.00 444004 MYWADI 400.00 2 137.91 0.7654 0.3827 0 0.3827 149.3 C1 2 E

444003 SALEM 400.00 444006 HOSUR 400.00 1 127.06 0.70518 0.35259 0 0.35259 -90.4 C1 3 D

444003 SALEM 400.00 444006 HOSUR 400.00 2 125.32 0.69555 0.347775 -0.4535 -0.105725 -91.6 A 5 B

444003 SALEM 400.00 444014 NLC2 400.00 1 174.95 0.97097 0.485485 -0.4535 0.031985 -378.1 B1 6 A

444003 SALEM 400.00 444014 NLC2 400.00 2 178.72 0.9919 0.49595 0 0.49595 -370.2 D 1 G

444004 MYWADI 400.00 444005 TRNLVLLI 400.00 1 264.99 1.47068 0.73534 -0.5714 0.16394 -154.2 B1 5 C

444004 MYWADI 400.00 444005 TRNLVLLI 400.00 2 264.99 1.47068 0.73534 -0.5714 0.16394 -154.2 D 3 E

444004 MYWADI 400.00 444010 CHKNRANI 400.00 1 127.13 0.70614 0.35307 0 0.35307 -457.7 A 9 A

444004 MYWADI 400.00 444011 ARASUR 400.00 1 65 0.444 0.222 0 0.222 -41.5 B1 4 D

444004 MYWADI 400.00 444011 ARASUR 400.00 2 65 0.444 0.222 0 0.222 -41.5 C2 2 F

444004 MYWADI 400.00 454005 PALAKD 400.00 1 90 0.4995 0.24975 0 0.24975 424.7 A 8 A

Annexure-IX

11/15

444004 MYWADI 400.00 454005 PALAKD 400.00 2 90 0.4995 0.24975 0 0.24975 424.7 B1 6 B

444004 MYWADI 400.00 444003 SALEM 400.00 1 150.4 0.83551 0.417755 -0.4535 -0.035745 -136.2 A 7 B

444004 MYWADI 400.00 444003 SALEM 400.00 2 137.91 0.7654 0.3827 0 0.3827 -148.6 B2 1 G

444005 TRNLVLLI 400.00 444010 CHKNRANI 400.00 1 161.7 0.89744 0.44872 0 0.44872 -110.5 A 1 G

444005 TRNLVLLI 400.00 444017 KKNPP 400.00 2 72 0.52776 0.26388 0 0.26388 -319.1 C2 8 A

444005 TRNLVLLI 400.00 444017 KKNPP 400.00 3 79.2 0.58053 0.290265 0 0.290265 -290.3 A 7 A

444005 TRNLVLLI 400.00 444017 KKNPP 400.00 4 79.2 0.58053 0.290265 0 0.290265 -290.3 D2 4 D

444005 TRNLVLLI 400.00 454002 TRIVNDRM 400.00 1 160.4 0.89022 0.44511 0 0.44511 231 A 6 B

444005 TRNLVLLI 400.00 454002 TRIVNDRM 400.00 2 160.4 0.89022 0.44511 0 0.44511 231 B2 2 F

444005 TRNLVLLI 400.00 444004 MYWADI 400.00 1 264.99 1.47068 0.73534 -0.5714 0.16394 155.5 B2 5 C

444005 TRNLVLLI 400.00 444004 MYWADI 400.00 2 264.99 1.47068 0.73534 -0.5714 0.16394 155.5 D 3 E

444006 HOSUR 400.00 434005 SMNHLLY 400.00 1 79.75 0.44265 0.221325 0 0.221325 13 B1 2 D

444006 HOSUR 400.00 434010 KOLAR-PG 400.00 1 69 0.38295 0.191475 0 0.191475 -372.7 A 5 A

444006 HOSUR 400.00 434010 KOLAR-PG 400.00 2 69 0.38295 0.191475 0 0.191475 -372.7 C2 3 C

444006 HOSUR 400.00 444003 SALEM 400.00 1 127.06 0.70518 0.35259 0 0.35259 90.6 D 1 E

444006 HOSUR 400.00 444003 SALEM 400.00 2 125.32 0.69555 0.347775 0 0.347775 91.8 A 4 B

444007 KVPATTU 400.00 444015 PUGALUR 400.00 1 362 2.65346 1.32673 -0.4535 0.87323 98.9 B1 4 C

444007 KVPATTU 400.00 444015 PUGALUR 400.00 2 362 2.65346 1.32673 -0.4535 0.87323 98.9 C2 1 G

444007 KVPATTU 400.00 444019 VALLUR 400.00 1 133.9 0.80608 0.40304 0 0.40304 -263.3 B2 6 A

444007 KVPATTU 400.00 444019 VALLUR 400.00 2 133.9 0.80608 0.40304 0 0.40304 -263.3 C2 2 E

444007 KVPATTU 400.00 444024 TRVLM 400.00 1 113.92 0.63226 0.31613 0 0.31613 -90.6 D 5 B

444007 KVPATTU 400.00 444024 TRVLM 400.00 2 113.92 0.63226 0.31613 0 0.31613 -90.6 C1 3 D

444009 ALUNDUR 400.00 444010 CHKNRANI 400.00 1 130 0.7242 0.3621 0 0.3621 -97.2 B1 2 C

444009 ALUNDUR 400.00 444012 KRAIKUDI 400.00 1 97.7 0.49949 0.249745 0 0.249745 46.2 C1 3 B

444009 ALUNDUR 400.00 444034 NGPTNMPS 400.00 1 160.07 0.88078 0.44039 0 0.44039 -276.1 B1 4 A

444009 ALUNDUR 400.00 444034 NGPTNMPS 400.00 2 160.07 0.88078 0.44039 0 0.44039 -276.1 D 1 E

444010 CHKNRANI 400.00 444012 KRAIKUDI 400.00 1 129.76 0.49949 0.249745 0 0.249745 189.3 C2 3 E

444010 CHKNRANI 400.00 444015 PUGALUR 400.00 1 123.64 0.68265 0.341325 0 0.341325 51.2 B1 5 C

444010 CHKNRANI 400.00 444015 PUGALUR 400.00 2 123.64 0.68265 0.341325 0 0.341325 51.2 D 2 F

444010 CHKNRANI 400.00 444028 TUTCRNPS 400.00 1 94.8 0.69394 0.34697 0 0.34697 -668.8 B2 9 A

444010 CHKNRANI 400.00 444028 TUTCRNPS 400.00 2 94.8 0.69394 0.34697 0 0.34697 -668.8 C2 7 B

444010 CHKNRANI 400.00 444029 TNVL-TIE 400.00 1 161.7 0.89744 0.44872 0 0.44872 1.6 1 G

444010 CHKNRANI 400.00 444004 MYWADI 400.00 1 127.13 0.70614 0.35307 0 0.35307 463 A 8 A

444010 CHKNRANI 400.00 444005 TRNLVLLI 400.00 1 161.7 0.89744 0.44872 0 0.44872 110.9 D 4 D

444010 CHKNRANI 400.00 444009 ALUNDUR 400.00 1 130 0.7242 0.3621 -0.4535 -0.0914 97.4 A 6 B

Annexure-IX

12/15

444011 ARASUR 400.00 444020 METR-III 400.00 1 140 0.777 0.3885 0 0.3885 -153.5 B2 3 B

444011 ARASUR 400.00 444020 METR-III 400.00 2 140 0.777 0.3885 0 0.3885 -153.5 C2 1 D

444011 ARASUR 400.00 444004 MYWADI 400.00 1 65 0.444 0.222 0 0.222 41.6 B1 4 A

444011 ARASUR 400.00 444004 MYWADI 400.00 2 65 0.444 0.222 0 0.222 41.6 C1 2 C

444012 KRAIKUDI 400.00 444015 PUGALUR 400.00 1 160 1.1728 0.5864 0 0.5864 -88.4 5 B

444012 KRAIKUDI 400.00 444015 PUGALUR 400.00 2 160 1.1728 0.5864 0 0.5864 -88.4 2 E

444012 KRAIKUDI 400.00 444030 KAYATHAR 400.00 1 195 1.42935 0.714675 0 0.714675 15.3 C1 4 C

444012 KRAIKUDI 400.00 444030 KAYATHAR 400.00 2 195 1.42935 0.714675 0 0.714675 15.3 B1 1 G

444012 KRAIKUDI 400.00 444009 ALUNDUR 400.00 1 97.7 0.49949 0.249745 0 0.249745 -46.1 A 6 A

444012 KRAIKUDI 400.00 444010 CHKNRANI 400.00 1 129.76 0.49949 0.249745 0 0.249745 -188.7 D 3 D

444013 NLC1EXP 400.00 444014 NLC2 400.00 1 13.94 0.07736 0.03868 0 0.03868 326.9 A 2 A

444013 NLC1EXP 400.00 444034 NGPTNMPS 400.00 1 57.1 0.31594 0.15797 0 0.15797 51.1 B2 1 B

444014 NLC2 400.00 444015 PUGALUR 400.00 1 198.05 1.09916 0.54958 0 0.54958 184.6 C1 1 G

444014 NLC2 400.00 444016 NLC2EXP 400.00 1 1.35 0.00751 0.003755 0 0.003755 -264.9 A 7 A

444014 NLC2 400.00 444034 NGPTNMPS 400.00 1 56.92 0.27315 0.136575 0 0.136575 -33.5 C2 3 D

444014 NLC2 400.00 464001 PONDY 400.00 1 67.88 0.2775 0.13875 0 0.13875 340.9 B2 6 A

444014 NLC2 400.00 444003 SALEM 400.00 1 174.95 0.97097 0.485485 0 0.485485 383.1 A 5 B

444014 NLC2 400.00 444003 SALEM 400.00 2 178.72 0.9919 0.49595 0 0.49595 375.1 D2 2 E

444014 NLC2 400.00 444013 NLC1EXP 400.00 1 13.94 0.07736 0.03868 0 0.03868 -326.7 C1 4 C

444015 PUGALUR 400.00 444016 NLC2EXP 400.00 1 199.54 1.10743 0.553715 0 0.553715 -183.8 C2 3 E

444015 PUGALUR 400.00 444007 KVPATTU 400.00 1 362 2.65346 1.32673 -0.4535 0.87323 -98.6 C2 4 D

444015 PUGALUR 400.00 444007 KVPATTU 400.00 2 362 2.65346 1.32673 -0.4535 0.87323 -98.6 B2 1 G

444015 PUGALUR 400.00 444010 CHKNRANI 400.00 1 123.64 0.68265 0.341325 0 0.341325 -51.1 B1 7 A

444015 PUGALUR 400.00 444010 CHKNRANI 400.00 2 123.64 0.68265 0.341325 0 0.341325 -51.1 D 6 B

444015 PUGALUR 400.00 444012 KRAIKUDI 400.00 1 160 1.1728 0.5864 0 0.5864 88.5 5 C

444015 PUGALUR 400.00 444012 KRAIKUDI 400.00 2 160 1.1728 0.5864 0 0.5864 88.5 2 F

444015 PUGALUR 400.00 444014 NLC2 400.00 1 198.05 1.09916 0.54958 -0.4535 0.09608 -183.4 C1 8 A

444016 NLC2EXP 400.00 444014 NLC2 400.00 1 1.35 0.00751 0.003755 0 0.003755 264.9 A 2 A

444016 NLC2EXP 400.00 444015 PUGALUR 400.00 1 199.54 1.10743 0.553715 0 0.553715 185.1 B1 1 B

444017 KKNPP 400.00 444029 TNVL-TIE 400.00 1 72 0.52776 0.26388 0 0.26388 -1.6 B2 4 A

444017 KKNPP 400.00 444005 TRNLVLLI 400.00 2 72 0.52776 0.26388 0 0.26388 319.8 C2 2 C

444017 KKNPP 400.00 444005 TRNLVLLI 400.00 3 79.2 0.58053 0.290265 0 0.290265 290.9 A 3 B

444017 KKNPP 400.00 444005 TRNLVLLI 400.00 4 79.2 0.58053 0.290265 0 0.290265 290.9 D2 1 E

444018 SVCHTRM 400.00 444022 NCTPS-II 400.00 1 95 0.52725 0.263625 0 0.263625 -314.7 A 4 C

444018 SVCHTRM 400.00 444022 NCTPS-II 400.00 2 95 0.52725 0.263625 0 0.263625 -314.7 B1 1 G

Annexure-IX

13/15

444018 SVCHTRM 400.00 464001 PONDY 400.00 1 136.42 0.0535 0.02675 0 0.02675 58.3 B1 3 D

444018 SVCHTRM 400.00 444001 SRPRMBDR 400.00 1 17.9 0.00702 0.00351 0 0.00351 267.5 B1 6 A

444018 SVCHTRM 400.00 444002 ALAMATTY 400.00 1 94 0.5217 0.26085 0 0.26085 -126.1 A 5 B

444018 SVCHTRM 400.00 444002 ALAMATTY 400.00 2 94 0.5217 0.26085 0 0.26085 -126.1 D 2 E

444019 VALLUR 400.00 444022 NCTPS-II 400.00 1 3.5 0.01942 0.00971 0 0.00971 -30.9 B2 4 C

444019 VALLUR 400.00 444022 NCTPS-II 400.00 2 3.5 0.01942 0.00971 0 0.00971 -30.9 C2 2 E

444019 VALLUR 400.00 444002 ALAMATTY 400.00 1 37.32 0.20535 0.102675 0 0.102675 464.9 B1 6 A

444019 VALLUR 400.00 444002 ALAMATTY 400.00 2 37.32 0.20535 0.102675 0 0.102675 464.9 C1 3 D

444019 VALLUR 400.00 444007 KVPATTU 400.00 1 133.9 0.80608 0.40304 0 0.40304 265 B1 5 B

444019 VALLUR 400.00 444007 KVPATTU 400.00 2 133.9 0.80608 0.40304 0 0.40304 265 D 1 G

444020 METR-III 400.00 444031 TRVLM-TN 400.00 1 270 1.9764 0.9882 -0.5714 0.4168 -312.9 3 B

444020 METR-III 400.00 444031 TRVLM-TN 400.00 2 270 1.9764 0.9882 -0.5714 0.4168 -312.9 1 D

444020 METR-III 400.00 444011 ARASUR 400.00 1 140 0.777 0.3885 0 0.3885 154.2 B2 4 A

444020 METR-III 400.00 444011 ARASUR 400.00 2 140 0.777 0.3885 0 0.3885 154.2 D 2 C

444021 TUTCRNJV 400.00 444023 CENERGY 400.00 1 47.29 0.34664 0.17332 0 0.17332 304.6 A 2 A

444021 TUTCRNJV 400.00 444028 TUTCRNPS 400.00 1 61.58 0.45077 0.225385 0 0.225385 645.4 B1 1 B

444022 NCTPS-II 400.00 444002 ALAMATTY 400.00 1 84 0.4662 0.2331 0 0.2331 217.6 B1 4 C

444022 NCTPS-II 400.00 444002 ALAMATTY 400.00 2 84 0.4662 0.2331 0 0.2331 217.6 C1 2 E

444022 NCTPS-II 400.00 444018 SVCHTRM 400.00 1 95 0.52725 0.263625 0 0.263625 316.5 B2 5 B

444022 NCTPS-II 400.00 444018 SVCHTRM 400.00 2 95 0.52725 0.263625 0 0.263625 316.5 D 1 G

444022 NCTPS-II 400.00 444019 VALLUR 400.00 1 3.5 0.01942 0.00971 0 0.00971 30.9 B2 6 A

444022 NCTPS-II 400.00 444019 VALLUR 400.00 2 3.5 0.01942 0.00971 0 0.00971 30.9 C2 3 D

444023 CENERGY 400.00 444028 TUTCRNPS 400.00 1 36 0.26388 0.13194 0 0.13194 704.2 A 2 A

444023 CENERGY 400.00 444021 TUTCRNJV 400.00 1 47.29 0.34664 0.17332 0 0.17332 -304.2 C1 1 C

444024 TRVLM 400.00 414002 CHITOOR 400.00 1 21.02 0.15409 0.077045 0 0.077045 -100.8 A 8 A

444024 TRVLM 400.00 414002 CHITOOR 400.00 2 21.02 0.15409 0.077045 0 0.077045 -100.8 B1 7 A

444024 TRVLM 400.00 414003 NLR-PG 400.00 1 172.96 1.2678 0.6339 -0.453 0.1809 -306.6 D 6 B

444024 TRVLM 400.00 414003 NLR-PG 400.00 2 172.96 1.2678 0.6339 -0.453 0.1809 -306.6 B1 4 D

444024 TRVLM 400.00 434010 KOLAR-PG 400.00 1 153.19 0.8502 0.4251 0 0.4251 203.3 C2 1 G

444024 TRVLM 400.00 444001 SRPRMBDR 400.00 1 85.04 0.47197 0.235985 0 0.235985 159.5 B1 3 E

444024 TRVLM 400.00 444007 KVPATTU 400.00 1 113.92 0.63226 0.31613 0 0.31613 90.8 B2 5 C

444024 TRVLM 400.00 444007 KVPATTU 400.00 2 113.92 0.63226 0.31613 0 0.31613 90.8 B1 2 F

444028 TUTCRNPS 400.00 444010 CHKNRANI 400.00 1 94.8 0.69394 0.34697 0 0.34697 672.8 D 3 B

444028 TUTCRNPS 400.00 444010 CHKNRANI 400.00 2 94.8 0.69394 0.34697 0 0.34697 672.8 B1 1 E

444028 TUTCRNPS 400.00 444021 TUTCRNJV 400.00 1 61.58 0.45077 0.225385 0 0.225385 -643.1 B2 2 C

Annexure-IX

14/15

444028 TUTCRNPS 400.00 444023 CENERGY 400.00 1 36 0.26388 0.13194 0 0.13194 -702.5 A 4 A

444029 TNVL-TIE 400.00 444010 CHKNRANI 400.00 1 161.7 0.89744 0.44872 0 0.44872 -1.6 B1 1 B

444029 TNVL-TIE 400.00 444017 KKNPP 400.00 1 72 0.52776 0.26388 0 0.26388 1.6 A 2 A

444030 KAYATHAR 400.00 444012 KRAIKUDI 400.00 1 195 1.42935 0.714675 -0.5713 0.143375 -15.3 A 2 B

444030 KAYATHAR 400.00 444012 KRAIKUDI 400.00 2 195 1.42935 0.714675 -0.5713 0.143375 -15.3 D 1 D

444031 TRVLM-TN 400.00 444002 ALAMATTY 400.00 1 112.3 0.67605 0.338025 0 0.338025 -50.2 3 B

444031 TRVLM-TN 400.00 444002 ALAMATTY 400.00 2 112.3 0.67605 0.338025 0 0.338025 -50.2 2 C

444031 TRVLM-TN 400.00 444020 METR-III 400.00 1 270 1.9764 0.9882 -0.5714 0.4168 315.4 4 A

444031 TRVLM-TN 400.00 444020 METR-III 400.00 2 270 1.9764 0.9882 -0.5714 0.4168 315.4 1 D

444032 ILFS 400.00 444034 NGPTNMPS 400.00 1 13.94 0.33818 0.16909 0 0.16909 270 A 2 A

444032 ILFS 400.00 444034 NGPTNMPS 400.00 2 13.94 0.33818 0.16909 0 0.16909 270 C1 1 C

444034 NGPTNMPS 400.00 444009 ALUNDUR 400.00 1 160.07 0.88078 0.44039 0 0.44039 278.4 A 4 C

444034 NGPTNMPS 400.00 444009 ALUNDUR 400.00 2 160.07 0.88078 0.44039 0 0.44039 278.4 D 1 G

444034 NGPTNMPS 400.00 444013 NLC1EXP 400.00 1 57.1 0.31594 0.15797 0 0.15797 -51 A 3 D

444034 NGPTNMPS 400.00 444014 NLC2 400.00 1 56.92 0.27315 0.136575 0 0.136575 33.5 D 5 B

444034 NGPTNMPS 400.00 444032 ILFS 400.00 1 13.94 0.33818 0.16909 0 0.16909 -269.7 A 6 A

444034 NGPTNMPS 400.00 444032 ILFS 400.00 2 13.94 0.33818 0.16909 0 0.16909 -269.7 C1 2 E

454001 TRICHUR 400.00 454004 COCHIN 400.00 1 78.2 0.5783 0.28915 0 0.28915 22.6 A 3 B

454001 TRICHUR 400.00 454004 COCHIN 400.00 2 78.2 0.5783 0.28915 0 0.28915 22.6 D 1 E

454001 TRICHUR 400.00 454005 PALAKD 400.00 1 90 0.4995 0.24975 0 0.24975 -245.1 A 4 A

454001 TRICHUR 400.00 454005 PALAKD 400.00 2 90 0.4995 0.24975 0 0.24975 -245.1 C1 2 C

454002 TRIVNDRM 400.00 444005 TRNLVLLI 400.00 1 160.4 0.89022 0.44511 0 0.44511 -229.3 A 2 B

454002 TRIVNDRM 400.00 444005 TRNLVLLI 400.00 2 160.4 0.89022 0.44511 0 0.44511 -229.3 D 1 F

454004 COCHIN 400.00 454001 TRICHUR 400.00 1 78.2 0.5783 0.28915 0 0.28915 -22.6 D 2 B

454004 COCHIN 400.00 454001 TRICHUR 400.00 2 78.2 0.5783 0.28915 0 0.28915 -22.6 B2 1 E

454005 PALAKD 400.00 444004 MYWADI 400.00 1 90 0.4995 0.24975 0 0.24975 -421.4 A 4 A

454005 PALAKD 400.00 444004 MYWADI 400.00 2 90 0.4995 0.24975 0 0.24975 -421.4 B2 2 C

454005 PALAKD 400.00 454001 TRICHUR 400.00 1 90 0.4995 0.24975 0 0.24975 246.2 A 3 B

454005 PALAKD 400.00 454001 TRICHUR 400.00 2 90 0.4995 0.24975 0 0.24975 246.2 D 1 E

454008 KOZKODE 400.00 434020 MYSORE 400.00 1 203 1.12667 0.563335 -0.5714 -0.008065 -124.9 A 2 A

454008 KOZKODE 400.00 434020 MYSORE 400.00 2 203 1.12667 0.563335 -0.5714 -0.008065 -124.9 D 1 E

464001 PONDY 400.00 444014 NLC2 400.00 1 67.88 0.2775 0.13875 0 0.13875 -339.7 B1 2 B

464001 PONDY 400.00 444018 SVCHTRM 400.00 1 136.42 0.0535 0.02675 0 0.02675 -58.2 C1 1 D

Annexure-IX

15/15

I__________...__..1.. . . J

TANTRANSCOi-F rom-- ----------·---------r ro-- _._----_._-------------------_._---.i Er. J. Rexline Terese, M.E., i The Member Secretary,I Chief Engineer, i Southern Regional Power Committee,i Protection and Communication, 29, Race Course Cross Road,i TANTRANSCO, Bangalore - 560 009.[ 5B Block, First floor,! TNEB complex,i 144, Anna Salai,L~hennai=-_~gO 002.

Lr.No. CE/P&C/SE/D/EEPC 4/AEE 3/F.5RPC/D. 4-2 /16, dated 05.03.2016.

Sir,Sub: TANTRANSCO - PCSC Recommendations - Issue to be included in

Agenda for 52nd PCSC meeting - Requested - Reg.

*** * ***During the review of the tripp ing of 400kV Alamathy-S.V.Chatram Line-1 & 2

on 29.03.2015 at 15:29 hrs., PCSC Forum recommended to swap the Distance

Protection relays between two stations so that Main-1 and Main-2 will be of different

make at each Sub-station.

With reference to the above, the following issue may please be included in

the agenda for 52nd PCSC meeting:

1. In the Sub-stations with established Sub-station Automation System (SAS),

the integration of another make relay in SAS attracts additional expenditu re

which is many times the panel cost. It requires wiring modifications &

updation and the technical hitches are also to be attended.

2. Hence, it is requested that the forum may recommend to drop the protection

audit remarks and to continue with the present arrangement for the existing

Substations. However, different make Distance Protection relays will be

provided in the upcoming 230kV and above level Sub-stations.

Af- \~~Chief EngineerjP&C

Copy submitted to the Managing DirectorjTANTRANSCO.Copy submitted to the DirectorjOperationjTANTRANSCO.

Annexure- X

Page 1 of 1

Annexure-XI

1 of 3

Annexure-XI

2 of 3

Annexure-XI

3 of 3

Some notes regarding implementing V. Ramakrishna Committee

(Task Force, TF) report based settings in 220 kV feeders.

1. Zone-2 Resistive Reach and Reverse Zone (Zone-4) Time Delay:

Case:

In 220 kV feeder relays, the reverse-zone delay is recommended as 0.5 seconds (TF). For

long lines followed by short lines, the Zone 2 delay is selected as 0.5 seconds (TF). Often the

delay of Zone-2 has to be increased from 0.35 seconds to 0.5 seconds especially in the case of

double circuits followed by short line. It has been observed that the lines like 220KV Sabarigiri-

Edamon which is passing through thick forests, trips in zone 2 (or zone 3) due to high resistance

faults. Since resistive reach of reverse zone is selected as resistive reach of Zone-3 (TF),

reverse zone in other feeders may operate before the tripping of faulty feeder in such cases.

Solution (proposed):

a) Increase the resistive reach of Zone-2 of protected feeder equal to Zone-3 to get maximum

resistive reach. b) (i) Set Reverse zone time delay = Zone-2 delay + breaker tripping time + relay reset time +

safety margin.

= Zone-2 delay + 150 ms. [This is as per TF guidelines]

(ii) However, it is safer to select

Reverse-zone time delay = Zone-3 delay + breaker tripping time + relay reset time +

safety margin

= Zone-3 delay + 150 msec.

Deliberations:

It was noted that with a reverse reach setting of less than the Zone-1 reach of distance protection

for the shortest line connected to the local bus bar, the Zone-4 time delay would only need to co-

ordinate with bus bar main protection fault clearance and with Zone-1 fault clearance for lines

out of the same substation. For this reason, it is sufficient if Reverse Zone time setting is co-

ordinated with Zone-2 time setting guidelines. However, for high resistance faults, as the

resistive reach of reverse zone equals that of Zone-3, it may be advantageous to co-ordinate

Reverse Zone time setting with Zone-3 time setting guidelines.

2. Power Swing Blocking and Load Encroachment Inhibit:

Case: Setting of Power swing blocking is based on minimum source impedance and initial swing

frequency as 1.5Hz.

Issue:

a. The setting of power swing blocking in REL 670 is very difficult and different from other

relays. There is no common approach.

b. The setting of Load Encroachment Inhibit feature in REL 670 relay is influenced by setting of

power swing blocking. Often load encroachment inhibit feature is extended to Zone-2 reach.

Load encroachment occurs in feeders with heavy overload which may increase sag of lines

leading to arcing to ground resulting in high resistance fault. But Load encroachment inhibit

feature will block operation of the distance relay at this time even though there is a good

chance for occurrence of such fault. Directional earth fault protection has to take care of it.


a) Detailed discussion is required exclusively in setting of Power Swing Blocking and Load

encroachment inhibit.

Annexure-XII

1/4

b) Common approach in all relays is to be developed in the setting of Power swing blocking

and load encroachment inhibit.

c) Studies are to be carried out and values of initial and following power swing frequencies are

to be identified by system administrators.

Deliberations:

In this regard, it was explained that the assumption of initial swing frequency as 1.5 Hz is

specific to REL-670 relay, for which relay, suitable values to be set for Load Impedance

Encroachment and Power Swing Detection have been dealt with in detail in the Model Setting

Calculations Report for typical IED’s brought out by Ramakrishna Committee.

Regarding the common approach to be adopted for setting Power Swing Blocking, it was noted

that the same is under consideration by National Power Committee (NPC), and agreed to wait

for specific direction in this regard.

Regarding the general philosophy to be adopted for setting Load Impedance Encroachment, the

following guidelines of Ramakrishna Committee are reiterated:

Ideal solution to tackle load encroachment may be based on the use of blinders or by

suitably setting the resistive reach of specially shaped impedance elements or by use of

polygon type impedance elements.

It is recommended that all the distance relays should have quadrilateral / polygon

characteristic. For relays having Mho characteristics, it is desirable to have load

encroachment prevention characteristics or a blinder.

In the absence of credible data regarding minimum voltage and maximum load expected for

a feeder during emergency system condition, following criteria may be considered for

deciding resistive reach / blinder setting to prevent load point encroachment:

Maximum load current (Imax) may be considered as 1.5 times the thermal rating of

the line or 1.5 times the associated bay equipment current rating ( the minimum of

the bay equipment individual rating) whichever is lower. (Note: The rating

considered is approximately 15 minutes rating of the transmission facility).

Minimum Voltage (Vmin) to be considered as 0.85pu (85%).

For setting angle for load blinder, a value of 30 degree may be adequate in most

cases.

For high resistive earth fault where impedance locus lies in the Blinder zone, fault clearance

shall be provided by the back-up directional earth fault relay.

Load encroachment feature is to be enabled in distance relays where the zone-3 resistive

reach is more than the load resistance.

3. Zone-3 time setting:

Case: Zone 3 delay in 220KV feeders are suggested as 800ms.

Issue: Zone-2 delay of distance relay in any of feeders from adjacent station may be 0.5 seconds. If the

breaker of that feeder from adjacent station fails to operate for a fault in zone 2 reach, LBB

protection of that particular breaker has to act before zone 3 operation of lines from remote ends.

Present zone-3 delay is not having sufficient margin with zone 2 of 0.5 seconds and LBB delay of

0.2 seconds.


Increase Zone-3 delay has to be increased to at least 1 second in order to ensure security.

Deliberations:

It was noted that this had already been recommended by Ramakrishna Committee.

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4. Grading of Zone 3 delay with protections of transformer and its downstream

side in the adjacent station:

Case:

Zone-3 delay of relay in a feeder has to be coordinated with protections in transformer and its

downstream side in adjacent station.

Issues and solutions: a brief note

Zone-3 settings are provided not for the protection of the feeder on which the relay is provided.

Zone-3 protection is supposed to act as back-up to the protection provided in the feeders from

adjacent station.

However, in practice it has been seen that it is very difficult to set Zone-3 values. And it has been

experienced in India and abroad that Zone-3 protection has acted for heavy over loads during

disturbed system conditions which again worsened and collapsed the system.

Some examples:

a) On 30th

July, 2012, the tripping of 400KV Bina-Gwalior 1 with Zone 3 indications led to serious

collapses. Actually, there was no fault in any of the line from adjacent station. However, it was

reported that system voltages were reduced and currents were increased due to overloading. Similar

incident was repeated on next day.

b. On 2nd

July, 1996, the tripping of Mill Creek -Antellope of WSCC (Wersten North America) line

tripped undesirably on Zone 3 leading to cascaded tripping in many areas in Canada, Mexico,

California, Arizona etc. affecting two million people.

In such cases as above, the reason for mal-operation of Zone 3 is due to stressed overloading and

stressed voltage conditions.

Therefore, the following points merit attention:

1. Zone 3 operation makes mal-operation than real operation.

2. The chances of operation of Zone-3 is very less except in the cases of high resistance fault

conditions which would otherwise would be sensed by directional earth fault (DEF) protection.

3. For avoiding mal-operation due to load encroachment, Load Encroachment Inhibit feature may

be enabled for those ones having that feature. However, in relays like ABB's REL 670, it completely

blocks operation of distance protection even if high resistance earth faults may be developed as part

of severe overloading and due to conductor sagging. Operation of Directional earth fault becomes

critical then.

4. Extending reach of Zone-3 covering transformer impedance worsens security again. Following

points are to be noted in this case:

An earth fault on the downstream side is sometimes cleared by directional earth fault relay

in the feeder on the downstream side of the transformer in case of line faults or by

transformer earth fault relay. However, the time of operation inversely depends upon the

magnitude of current which may vary according to the resistance of earth fault path, source

impedance etc. If Zone-3 is extended up to downstream side, it is very difficult to grade

with IDMT characteristics of earth fault relays in feeders in downstream side and in

transformer protection panels.

For solid fault in the downstream side of transformer, there will be significant in-feed from

upstream side to the fault. This will under reach Zone 3 reach leading to non operation of

Zone 3 protection. This shows that further delaying of Zone 3 in the name of coordinating

with downstream side earth fault or phase fault protection is of no use.

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5. It is not practical to provide multipliers as much high as to compensate under reaching effect due

to heavy in-feed in the case of Zone-3. Because, the fault and system conditions are varying and this

may lead to expansion of Zone-3 reach during low fault levels threatening system security.

6. For 220KV and above systems, two redundant distance protections are used. Zone-2 protection is

set as 120 percent or 150 percent of the impedance of the protected line for ensuring 100 percent

feeder protection. Besides this, LBB protection will be in service in every such substations, which

trips all feeders and transformers connected to the bus in case of breaker failure. Therefore, there is

practically no chance for Zone-3 protection to act for any fault in any of the lines from adjacent

station.

Considering the above facts, following steps can be taken as optimum solution:

1. Restrict Zone 3 protection reach up to longest line end from adjacent station. The equation:

Zone 3 = 1.2* (impedance of protected line + impedance of longest line from adjacent station)

is acceptable. The multiplier 1.2 can be increased if only there is heavy in-feed through out in

service duration. (But it was noted that this may result in reaching into lower voltage level if

Tx < LL)

2. Enable Directional over-current protection inside the distance protection and set the same

in such a way as to coordinate the same with transformer over-current protection in the

adjacent station. Similarly, set the pick-up value of directional earth fault relay in the

protected line to sense the lowest earth fault current in the downstream side of the

transformer. It may please be noted that these protections are supposed only to ensure

tripping and fault isolation in the extreme cases.

3. Set time delay of Zone-3 to 1 second or in extreme cases to 1.5 seconds. In KSEB, back up

impedance setting of generators are set at 2.5 seconds to act as back up to all protections in

the downstream side. Therefore, Zone-3 delay cannot be increased too much which may lead

to generator tripping.

It was informed that presently KSEB is following the procedure similar to the above suggestion to a

good extent.

Deliberations:

In the light of above, the following from CBIP guidelines were noted:

When transmission circuits are provided with duplicate main protection, there may be a case

for not applying Zone-3 remote back-up protection for reasons of security. [CBIP-296:

Page-60]

It is felt that if the adjacent station has bus-bar protection and breaker failure protection,

Zone-3 can be dispensed with. [CBIP-296: Page-56]

In South Africa, for long line applications, ESKOM follows the philosophy of enhanced LBB

protection. Logic is extensive duplicated LBB obviates the need for remote (third-zone)

back-up. [CBIP-296: Page-56]

*****

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