report on punjab islanding scheme revised r1report on punjab islanding scheme revised [r1] (j...
TRANSCRIPT
(A State Govt. undertaking)
REPORTON
PUNJAB ISLANDING SCHEMERevised [R1]
(JANUARY, 2013)
Office ofChief Engineer/SLDC,
Punjab State Transmission Corporation LimitedE-mail: [email protected]
INDEXCHAPTER Page No.
1. Preamble 1-2
2. Overview of Punjab Power System 3
3. General Philosophy on formation of Islands 4
4. Islanding Scheme for Punjab Control Area 5-7
5. Detail of Proposed Islands
5.1 GGSSTP Ropar Island 8-10Detail of Load to be met (Annexure- I A) i-iiDetail of Lines to be opened and Re-closed (Annexure-I B) iii-ivSketch of GGSSTP Ropar Island (Annexure-I C) v-xiv
5.2 GNDTP Bathinda & GHTP Lehra Mohabat Island 11-13Detail of Load to be met (Annexure-II A) i-iiDetail of Lines to be opened and Re-closed (Annexure-II B) iiiSketch of GNDTP Bathinda & GHTP Lehra Mohabat Island (Annexure-II C)
iv-x
6.0 Proposed Action Plan. 14-15
7.0 Major Challenges & Way Forward 16
8.0 Additional Annexures:
Technical Specification of UFRs ( Annexure III)
Bill of Material of UFRs (Annexure IV)
Status of connectivity & RTU availability at Sub stations
( Annexure V)
Line network Diagram of System and boundary of Islands
(Annexure VI)
17-18
19
20
21
APPENDIX
I Minutes of 1st Meeting of Islanding Scheme Group held on 7-Aug-2012
22-25
II Transmission Map of Punjab Network (132 KV and above) 26
III Detail of Under Frequency Relays (UFRs) and df/dt Relaysinstalled at various Grid Sub Stations in Punjab 27-30
1
CHAPTER-1.0
1.0 PREAMBLE1.1 Two major grid failure incidents occurred on 30th and 31st July, 2012 affecting a
large area of power network covering states namely Uttar Pradesh, Uttarkhand,
Punjab, Haryana, Rajasthan, Himachal Pradesh, Delhi falling under Northern
Region beside other states of Eastern (ER) & North- Eastern (NER) regions during
grid failure on 31.7.2012. In order to look in to the issues related to the Grid failures
and take necessary remedial measures, Ministry of Power (MoP), Govt. of India
(GoI) and North Indian States deliberated various steps to be taken during North
India Chief Ministers and Power Minister, GOI conference held at Delhi on 6th
August 2012. A twelve point resolution was approved to avoid grid
disturbance/collapse in future. As per the MoP directive, all states must
ascertain preparedness of power system defense plans and protection
system in accordance with the Indian Electricity Grid Code (IEGC), which
shall include islanding schemes, Under Frequency Relays (UFR), rate of
change frequency relays (df/dt), special protection schemes (SPS) and
automatic demand management schemes.
1.2 An Expert Committee constituted to enquire into the said Power Grid Disturbance
and to suggest remedial measures, has also inter alia made the following
recommendations:-
"Effort should be made to design islanding scheme based on frequency sensingrelays so that in case of imminent grid failure, electrical islands can be formed.These electrical islands can not only help in maintaining supply to essentialservices but would also help in faster restoration of grid .Action: CEA, RPCs, POWERGRID, STUs, SLDCs and Generators
Time Frame: 6 months"1.3 The Expert Committee has further formed five groups to look in to various
aspects related to grid disturbances. One of the groups headed by Member
Secretary, NRPC was formed for islanding scheme in Northern Region.
Minutes of first meeting of the islanding Scheme group was held at NRPC
office at Delhi on 07.08.2012. (Copy enclosed as Appendix I) which was
attended by representatives from all constituents under NR. The group
agreed on various aspects & modalities for implementation of the islanding
2
scheme. Based on proposals from STUs/SLDCs, preliminary feasibility of
various islanding schemes was agreed.
1.4 In order to take up implementation of the islanding scheme in Punjab Control
Area by PSTCL, deliberations were held with representatives of Power Grid
(Operation Services Group) who have been associated in finalizing the
islanding scheme for DTL recently. A study-cum-implementation group has
also been constituted by PSTCL to identify & work out further modalities for
taking up design & implementation of the scheme in line with guidelines of
CEA, NRPC, PGCIL etc.
1.5 Based on the inputs provided by NRPC/ PowerGrid and deliberations
amongst study group including PSPCL's representatives from all the three
major thermal generating stations (GGSSTP, GHTP & GNDTP) and BBMB,
PSTCL finalized the islanding scheme for Punjab control area, comprising
of the following 3 no. island;
i) GGSSTP Ropar with Gobindgarh area load.ii) GHTP & GNDTP with Bathinda area load.iii) BBMB Jamalpur with Ludhiana load.
The Punjab Islanding scheme report dated 20.11.2012 was submitted to
NRPC for approval.
1.6 The Islanding scheme was reviewed by NRPC/CEA during presentation
made by PSTCL held at NRPC, New Delhi on 21st Dec, 12. Based on the
suggestions/comments made by NRPC/CEA during the presentation, the
revised Islanding scheme has been prepared.
1.7 The major modifications /revisions made are as under;-
i) Only 2 no islanding scheme for GGSSTP and GHTP cum GNDTP
generating stations has been retained thereby excluding BBMB
Jamal Pur scheme as proposed earlier since BBMB Bhakra hydel
Units have quick black start facility.
ii) Both summer/paddy season (peak period) and winter season
average (off peak period) loading scenarios have been considered.
iii) Remote monitoring and control of islands through MMI/SCADA based
intelligent system at SLDC has been incorporated to manage the
islands, on the pattern of DTL scheme.
iv) 2 no important railway feeding stations at Sahnewal & Jamsher have
been included in the proposed islands.
3
CHAPTER 2.02.0 OVERVIEW OF PUNJAB POWER SYSTEM2.1 The Transmission functions in Punjab Power System are performed by
Punjab State Transmission Corporation Ltd. (PSTCL) whereas Generation &
Distribution functions are performed by Punjab State Power Corporation Ltd.
(PSPCL). Punjab Power System is operative with a number of generating
stations both Thermal and Hydel (Total Gross Generation = 3650 MW
approx) in the state sector owned by PSPCL. Beside this Punjab also draws
its share from BBMB Hydro-Generating stations through BBMB Transmission
network.The Punjab network is also linked with 400 KV PGCIL network at
Malerkotla, Moga, Patiala, Ludhiana, Jalandhar and Amritsar to draw Central
sector share.
2.2 The transmission network of Punjab consists of 132 KV & 220 KV network
spread all over the state. Presently, a major 400 KV transmission network in
PSTCL is also in advanced stage of commissioning mainly for the evacuation
of power from upcoming Thermal Power Stations in Private sector (IPPs) at
Talwandi Sabo and Rajpura. The transmission map of Punjab 132 KV &
above is attached as Appendix II2.3 The Punjab has transformation capacity of 20800MVA approx. and 220 kV &
132 kV transmission lines of 8200 Ckt. Km (as on 31.07.12).There is a plan
to add further transformation capacity of 2000MVA during 2013-14 and
2000MVA in 2014-15. The present transformation capacity of ICTs located in
Powergrid Grid Sub-stations in Punjab is also being augmented under Inter
state system strengthening scheme undertaken by Power grid.
Corresponding to these transformation capacity additions, new transmission
links are being added/planned by PSTCL at respective Grid sub stations.
4
CHAPTER 3.0
3.0 GENERAL PHILOSOPHY ON FORMATION OF ISLANDS3.1 During Grid disturbance ,the control area shall endeavor to sustain through
the under frequency relays (UFRs) and df/dt relays based load shedding
scheme , already installed in the system, as a first line of defense. Only in
case, this defense mechanism fails and frequency continues its fall to
dangerously low levels, formation of islands shall be initiated as a last resort.
3.2 For success of islanding scheme, the load - generation balance in the islands
shall be maintained. To achieve this, at least one of the generators within the
island, shall operate with governor in frequency control mode.
3.3 Islanding scheme shall primarily be a two tier scheme. At frequency of 47.9
Hz, signal/command for formation of islands comprising of more than one
generating station along with pre-identified load shall be initiated. However, if
after the formation of island, frequency continues to fall further to say 47.7
Hz, these islands could be further broken into smaller islands or load
shedding shall be initiated within the island.
3.4 Load generation balance in pre-identified island may change based on
variation in seasonal demand, load growth and network changes, if any.
Islanding scheme shall therefore require intermittent review and re-
adjustments of loads to be cut-in/cut-off to match load - generation balance.
3.5 Efforts shall be made to cover major essential loads such as hospitals,
railway traction etc. in the proposed island. However, if it is not possible due
to some reasons, efforts should be made to extend supply from these islands
to identified essential loads on priority basis.
5
CHAPTER-4.0
4.0 ISLANDING SCHEME FOR PUNJAB CONTROL AREA:
4.1 Objective:Formation of proposed island shall achieve the following objectives:-
i) Prevention from total black out by avoiding effect of cascade tripping of
the Power System.
ii) Fast restoration of supply to the affected areas.
iii) Supply to Important Loads/essential services i.e. Railways, Hospitals
etc. shall be maintained or can be restored on priority
4.2 Present Status:
Presently there is no islanding scheme in operation in Punjab. However,
UFRs, df/dt relays have been installed on selected feeders to get desired load
relief under critical grid conditions to help grid security. A list of existing UFR
and df/dt relays is attached as Appendix III.
4.3 Proposed Islands:
The following islands have been proposed ,as identified by the Islanding
Scheme Group at NRPC in its meeting held on 07.08.2012 and further
deliberations held at NRPC on 21.12.12. :-
GGSSTP Ropar with Gobindgarh area load.
GHTP & GNDTP with Bathinda area load.
4.4 Methodology of Proposed Islanding Scheme;
Broad methodology adopted for the proposed Islanding scheme is as under :-
i) The scheme is primarily based on frequency measurement. This
measurement will be done through digital frequency sensing relays
(UFRs) to be installed at substations falling within island where
6
switching action is required.
ii) The proposed island scheme shall required to be configured /re-
configured for peak and off peak operating conditions. The pre-
identified relays ( UFRs) at the sub stations shall be enabled during off
peak period to cover the extended load , to match the available
generation. These relays shall be disabled during peak period.
iii) The proposed islanding scheme operations consists of three stages as
under;-
a) Stage I: When frequency dips to level of 47.9 Hzb) Stage II: When frequency further dips to level of 47.7 Hzc) Stage III: When frequency stays at 47.7 Hz*
* additional load shedding at an interval of 300milli-seconds up to 2 seconds in steps
iv) Disconnection of feeders will be triggered through UFRs proposed to
be installed at Sub stations. Two independent relays, for sensing the
frequency from each bus of sub station shall be provided at each of the
sub station falling under the islanding zone, classified as under:
Relay on Bus-1 = M1 and S1
Relay on Bus-2 = M2and S2
v) Up to 3 no 220 KV feeder will have dedicated set of relays (M1 and
M2) whereas in case of 66 KV feeders, one set of relay (S1 and S2)
will control up to four 66 KV feeders. S1 & S2 shall also control high
frequency swings in the island by operating at 50.5 Hz & 51.0 Hz for
auto reclosing the pre-identified feeders.
The setting of relays shall be as under:-
M1 M2 47.9 Hz
S1 S2 47.7 Hz
S1 S2 50.5 Hz (for Auto reclosing)
S1 S2 51.0 Hz (for Auto reclosing)
7
vi) Initially main two islands of Punjab Network will be created during stage
I of Islanding scheme (i.e. when frequency dips to level of 47.9 Hz ).
The large island will further be divided into smaller island(s) during
stage II of Islanding scheme (i.e. when frequency dips to level of 47.7
Hz ).
vi) One generating station in each island will be operated in frequency
control mode to control fluctuations in the frequency in that particular
island.
vii) Islanding load to be identified shall exclude the anticipated impact due
to load shedding under defense mechanism prior to islanding through
existing UFR & df/dt relays.
4.5 MECHANISM FOR FORMATION AND MAINTAINING ISLANDS
i) As system frequency is sensed at 47.9 Hz, relays (M1 and M2) will
operate and trip the identified feeders, thus forming a stage-I island.
ii) The frequency of the island so formed shall be further maintained
through both generator and load end. On generator end, one of the
units shall be operated in frequency mode and on load side when the
frequency drops to the level of 47.7 Hz (Stage-II), relays (S1 and S2)
will operate to switch off the pre-identified 66 KV feeders as per the
detail provided in the schematic diagram.
vii) To take care of the power swings due to sudden load throw off during
formation of island, relays (S1 and S2) will operate at 50.50 Hz/ 51.00
Hz (Stage III) to auto reclose the pre-identified 66 KV feeders of 4-5
MW with time delay of 300 msec in steps as per detail provided in the
schematic diagrams.
8
CHAPTER-5.0
(A State Govt. undertaking)
ISLANDING - I
GGSSTP, RoparISLANDING SCHEME
9
5.1 GGSTP ROPAR ISLANDING SCHEMEThere are six Units (6x210 MW) at GGSSTP Ropar. Total ex-bus generation
equals to 940 MW considering availability of 5 units and corresponding
average load for island scheme @ 80% of 940 MW comes to 755 MW. The
generation availability is considered as same during peak and off peak
periods.
Details of load to be fed to achieve Load-Generation balance is asunder:-
Name of S/S Average Load (MW)
Under Peak Load
(Summer)
Average Load (MW)
Under Off Peak Load
(Winter)
220 KV S/S G-1 200 200
220 KV S/S G-2 120 120
220 KV S/S G-3 80 80
220KV S/S G-4 80 40
220 KV S/S Amloh 120 80
220 KV S/S Kharar 115 110
220 KV S/S Kohara 30 30
220 KV S/S Sahnewal 10( Only Railway Load) 10( Only Railway Load)
220 KV S/S Jamsher NA 10( Only Railway Load)
220 KV S/S Goraya NA 75
Total 755 755
Note : The UFR presently installed at 220 KV G-1 will be shifted to 220 KV S/S
Mohali-1 and Mohali-2 (at setting of 48.2 Hz) to meet the above demand.
Details of sub stations wise load /feeders to be covered for load generation
balance in the island is as per Annexure-IA
10
Detail of outgoing feeders/bays to be opened (in order to maintain the above
anticipated islanding load of 755 MW) is as under:-
1. 220KV GGSSTP - Mohali Ckt (will be opened at Mohali end)2. 220KV Kharar – Mohali Ckt (will be opened at Kharar end)3. 220KV Kharar – 132 KV Ropar Ckt4. 220KV GGSSTP - Goraya Ckt (will be opened at Goraya end in Summer)5. 220KV GGSSTP - Goraya Ckt (will be operative in Winter)6. 220KV GGSSTP: Jamsher Ckt (will be opened at Jamsher end in Summer)7. 220KV GGSSTP: Jamsher Ckt (will be operative in Winter)8. 220/132 KV T/F: T-1 (at GGSSTP S/S)9. 220/132 KV T/F: T-2 (at GGSSTP S/S)10. 220 KV G-1: Ablowal circuits 1 & 2 (to be opened at G-1)11. 220 KV S/S G-1: Ikolaha (at G-1 end)12. 220 KV S/S G-2: Ganguwal Circuits 1 & 2 (to be opened at G-2 end)13. 220 KV S/S Amloh- Malerkotla (at Malerkotla end)14. 220 KV Sahnewal- Lalton (At Sahnewal)15. 220 KV Sahnewal- Doraha 1 & 2 (at Sahnewal)16. 220 KV Sahnewal-PGCIL (At Sahnewal)17. 220 KV Bus-Coupler at Sahnewal18. 220 KV S/S Jamsher:- Jalandhar-1,2, Rehana Jattan Mahilpur, Sultanpur-
1,2, Kotla Junga-1,2, 220KV/66KV T-1,T-2 will be opened at Jamsher End inWinter
19. All 66 KV lines at Kohara & 66/11 KV Power Tfrs. (T-3 & T-4)
Detail of lines to be opened and re-closed at various sub stations is as per
Annexure-IB.
Detail indicating locations of relays is given as per schematic diagram
attached as Annexure-IC
Page-(i)
Details of Load to be met :- Annexure-IA
Sr.No. Name of Plant Details of area to be fed Summer
Load
Winter
Load
Relief
from
UFRs(in
MW)
Relief from
df/dt relays(in
MW)
Relief
from
SPS (in
MW)
G. Total
Load
relief(MW)
Net Demand
to be met
Gross Total
Generation(MW)
Generation considered for
islanding purpose(MW)
(MW) (MW) Paddy
Load
Paddy Load Paddy
Load
Paddy Load (MW)
220KV s/s Gobindgarh G-1 200 200 0 0 0
1 GGSSTP, Ropar 220KV s/s Gobindgarh G-2 120 120 0 0 0 0 755
(6x210=1260MW) 755 ((i.e. 80% of 945) 220KV s/s Gobindgarh G-3 80 80 0 0 0
Ex-bus generation of 5 units
= 945 MW
220KV s/s Gobindgarh G-4 80 40 0 0 0
220 KV S/S Amloh 120 80 0 0 0
220 KV S/S Kharar 115 110 0 0 0
220 KV S/S Kohara 30 30 0 0 0
220 KV S/S Sahnewal 10 10 0 0 0
220 KV S/S Jamsher NA 10
220 KV S/S Goraya NA 75
Total 755 755 0 0 0 0 755
Page-(ii)
Details of Break-up of Load to be met :- Annexure-IA
S.No Name of Substations Load (MW) BREAK-UP OF LOAD Load(MW)
1 200 66 KV Ckt Amloh Road-1 0
66 KV Ckt Amloh Road-2 0
66 KV Ckt Joti Bansal 20
66 KV Ckt Modern Steel 25
66 KV Ckt Dutt Multi 6
66 KV Ckt Aman 3
66 KV Ckt Raghay Nabha 10
66 KV Ckt Talwara-1 25
66 KV Ckt Talwara-2 25
66 KV Ckt Bhiwani Industry 20
66 KV Ckt Focal Point Bassi Alloy 25
66 KV Ckt Bassi Alloy 9
66 KV Ckt T1,T4,T7 32
2 120 66 KV Ckt Bharri 20
66 KV Ckt Punjab Forge 10
66 KV Ckt Khanna-1 27
66 KV Ckt Khanna-2 27
66/11 KV T/F T-1 12
66 KV Ckt Amloh Road-1 0
66 KV Ckt Amloh Road-2 0
66/11 KV T/F T-2 12
66/11 KV T/F T-3 12
3 80 66 KV Ckt Sanjeev Bhatia* 5
66 KV Ckt KC Soni* 3
66/11 KV T/F T-1 12
66/11 KV T/F T-2 12
66/11 KV T/F T-3 15
66/11 KV T/F T-4 17
66/11 KV T/F T-6 16
Summer/Winter Summer/Winter
4 80/40 66KV Sirhind Ckt-1 34/14
66KV Sirhind Ckt-2 34/14
66/11 KV 20MVA T/F 12
Summer/Winter Summer/Winter
5 220 KV S/S Amloh 120/80 66 KV Ckt Modern Alloys 25
66 KV Ckt Neelkanth 5
66 KV Ckt Tanda Badha 35/10
66 KV Ckt Bimal Alloys 25
66/11 KV T/F T-1 15/5
66/11 KV T/F T-2 15/10
Summer/Winter Summer/Winter
6 220 KV S/S Kharar 115/110 66 KV Ckt Morinda-1 18/16
66 KV Ckt Morinda-2 18/15
66 KV Ckt Badali 15/14
66 KV Ckt PTL Majri 6
66 KV Ckt Dera Bassi 23
66 KV Ckt Majra 35
7 220 KV S/S Kohara 30 T2 66/11 KV 17
T6 66/11 KV 13
8 220 KV S/S Sahnewal 10 220KV Railway Ckt-1,2 10
Summer/Winter Winter
9 220 KV S/S Jamsher NA/10 220KV Railway Chaheru 10
10 220 KV S/S Goraya NA/75 220/132 KV T-1 22
220/132 KV T-2 22
66 KV Ckt Roorkee 14
66 KV Ckt Dausand 8
66 KV Ckt Uppran 9
220 KV Sub Station
Gobindgarh G-1
220 KV Sub Station
Gobindgarh G-2
220 KV Sub Station
Gobindgarh G-3
220 KV Sub Station
Gobindgarh G-4
Page-(iii)
GGSSTP ROPAR ISLAND : Details of Lines to Opened & Re-closed Annexure-IB
S.No Name of Substations Details of Feeders to be disconnected
(through Relays M1, M2)
Details of Feeders to be
disconnected (through
Relays S1, S2)
Remarks
1 220 KV S/S GGSSTP Ropar 220KV GGSSTP: Mohali Ckt Nil
220KV GGSSTP: Goraya Ckt Ckt will be operative in winter
220KV GGSSTP: Jamsher Ckt Ckt will be operative in winter
220/132 KV T/F: T-1
220/132 KV T/F: T-2
2 220 KV Sub Station Gobindgarh G-1 220KV Gobindgarh G-1 : Ablowal Ckt-1 66 KV Ckt Amloh Road-1
220KV Gobindgarh G-1 : Ablowal Ckt-2 66 KV Ckt Amloh Road-2
220KV Gobindgarh G-1 : Ikolaha 66 KV Ckt Chorwala
66 KV Ckt Amloh
66 KV Ckt Joti Bansal
66 KV Ckt Modern Steel
66 KV Ckt Dutt Multi
66 KV Ckt Aman
66 KV Ckt Raghay Nabha
66 KV Ckt Talwara-1
66 KV Ckt Talwara-2
66 KV Ckt Bhiwani Industry
66 KV Ckt Focal Point Bassi Alloy
66 KV Ckt Bassi Alloy
3 220 KV Sub Station Gobindgarh G-2 220 KV Gobindgarh G-2: Ganguwal Ckt-1 66 KV Ckt Grain Market
220 KV Gobindgarh G-2: Ganguwal Ckt-2 66 KV Ckt Bharri
66 KV Ckt Punjab Forge
66 KV Ckt Khanna-1
66 KV Ckt Khanna-2
66/11 KV T/F T-1
66 KV Ckt Badinpur
66 KV Ckt Amloh Road-1
66 KV Ckt Amloh Road-2
66 KV Ckt Central
66/11 KV T/F T-2
66/11 KV T/F T-3
66 KV lines to be tripped, if required after time
delay of 300 milli-seconds upto 2 seconds at 47.7
Hz to provide stability
All 66 KV lines to be tripped by S-1/ S-2 relays at
47.7 Hz.
df/dt already installed on 66 KV Grain Market, 66
KV Central & 66 KV Badinpur feeders
Page-(iv)
GGSSTP ROPAR ISLAND : Details of Lines to Opened & Re-closed Annexure-IB
4 220 KV Sub Station Gobindgarh G-3 Nil 66 KV Ckt-1 G2
66 KV Ckt-2 G2
66 KV Ckt Sanjeev Bhatia*
66 KV Ckt KC Soni*
66 KV Ckt-1 G1
66 KV Ckt-2 G1
66/11 KV T/F T-1 tot T-6
* These lines will be reclosed at 51.00 Hz
5 220 KV S/S Amloh 220 KV Amloh : 220 KV Ckt Malerkotla 66 KV Ckt Modern Alloys
66 KV Ckt Neelkanth
66 KV Ckt Amloh Road
66 KV Ckt Gobindgarh
66 KV Ckt Tanda Badha
66 KV Ckt Bimal Alloys
66/11 KV T/F T-1, T-2
6 220 KV S/S Kharar 220 KV Kharar: 132 KV Ckt Ropar Nil
220 KV Kharar: 220 KV Ckt Mohali-1 Nil
7 220 KV S/S Kohara 66 KV Ckt Allied Industry* Nil
66 KV Ckt Chaunta Bhaini Sahib*
66 KV Ckt Mahalaxami*
66/11KV T/F T-3 & T/F T-4 * These 66KV lines will be reclosed at 50.50 Hz
8 220 KV S/S Sahnewal 220 KV Sahnewal : 220 KV Ckt Lalton-1 Nil
220 KV Sahnewal : 220 KV Ckt PGCIL
220 KV Sahnewal : 220 KV Ckt Doraha-1
220 KV Sahnewal : 220 KV Ckt Doraha-2
220KV Bus Coupler
9 220 KV S/S Jamsher 220 KV Jamsher : 220 KV Jalandhar-1, 2 Nil
(For Winter Only) 220 KV Jamsher : 220 KV Rehana Jattan
220 KV Jamsher : 220 KV Mahilpur
220 KV Jamsher : 220 KV Sultanpur-1, 2
220 KV Jamsher : 220 KV Kotla Junga-1, 2
220/66 KV T/F: T-1, T-2
10 220 KV S/S Goraya Nil Nil
(For Winter Only)
RTP-Goraya Ckt will be opened from Goraya End in
Summer
RTP-Jamsher Ckt will be opened from Jamsher End
in Summer
All 66 KV lines to be tripped by S-1/ S-2 relays at
47.7 Hz
All 66 KV lines /T/Fs to be tripped by S1/S2 relays
at 47.9 Hz
66 KV lines to be tripped, if required after time
delay of 300 milli-seconds upto 2 seconds at 47.7
Hz to provide stability
Mohali
Kharar115 MW-PADDY110 MW NON PADDY
GG-480 MW PADDY40 MW NON PADDY
GG-380 MW
GG-2125 MW
GG-1200 MW
Goraya75 MW in nonpaddy season
JamsherOnly RailwayLoad
SahnewalNo Load
Kohara30 MW
ILK – 100 MVA, 220kV/132 kV ILK – 100 MVA, 220kV/132 kV
B.C.-2 B.C.-1220 kV Bus Bars
132 kV Bus Bars
Guj Ambuja Ropar Asron
GGSSTP, RoparIslanding Scheme755 MW
M1/M247.9 Hz
M1/M247.9 Hz
M1/M247.9 Hz
B.C.
v
Annexure-I C
RTP 4 RTP 3 Patiala 2 Patiala 1 Amloh RTP 2 RTP 1 GG 2-Ckt2 GG 2-Ckt1
T5, 100 MVA, 220kV/66 kV
220 kV Bus Bars
66 kV Bus Bars
Aman
B.C
T6, 100 MVA, 220kV/66 kV
T2, 100 MVA, 220kV/66 kV
Amloh Rd1 Amloh Rd2 Chorwala Amloh Joti Bansal Modern Steel DLT MultiRaghavNabha Talwara - 1 Talwara - 2 Bhawani Ind Focal Point Bassi Alloy
G-1 & G-4 (280 MW = 200+80 PADDY200+40 MW NON PADDY)UFR (48.2 Hz) installed here to be shifted to Mohali S/S
M1/M247.9 Hz
M1/M247.9 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
Ikolaha
M1/M247.9 Hz
220 kV S/S G-4(80 MW)
T-1110 A
T-4110 A
T-7110 A
66 kV lines to be tripped after time delay of 300 ms to provide stability
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
vi
G2-G1 Link1 G2-G1, Link2
T5, 100 MVA, 220kV/66 kV
Ganguwal 1 Ganguwal 2
220 kV Bus Bars
T-N, 100 MVA, 220kV/66 kV
T1, 100 MVA, 220kV/66 kV
Amloh Rd-2BharriGrain Market Pb. Forge Khanna-I Khanna-2 66/11 kV T-1 Badinpur Amloh Rd-1 Central
G-2 (125 MW=230-105)
66 kV Bus Bars
M1/M247.9 Hz
M1/M247.9 Hz
S1/S247.7 Hz
D1 D1 D1
D1 – df/dt relay, already installed(controls 105 MW load). To be provided ‘OR’ Logic for tripping at 47.7 Hz
66/11 kV T2 66/11 T-3
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
vii
LILO G-2 LILO G-1
220 kV Bus Bar
T-5, 100 MVA, 220kV/66 kVT6, 100 MVA, 220kV/66 kV
G2 Ckt-1 G2 Ckt-2SanjivBhatia KC Soni G1 Ckt-1
G-3 (122- 42= 80 MW)
66 kV Bus Bar
G1 Ckt-2
S1/S247.7 Hz
T-1 T-2 T-3 T-4 T-6
ChorwalaUFR – 48.8 HzAlreadyinstalled42 MW
S1/S2Re-close
S1/S2Re-close
66 kV Lines will re-close (S1/S2 & S1/S2)at 51.0 HzReclosing load to be 4 to 5 MW per feeder
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
viii
220 kV Bus Bars
66 kV Bus Bars
B.C at 47.9 HzM1/M2
T1, 100 MVA, 220kV/66 kV
Sahnewal (Only Railway load)
RTPKoharaRailway Ckt. 2PGCIL,LaltonLalton 1 Doraha-1
AveryKohara Garg Vallabh
T4, 100 MVA, 220kV/66 kV
Railway Ckt. 2 Doraha-2
T3, 100 MVA, 220kV/66 kV
Sahnewal-1 Sahnewal-2 Kanganwal-1 Kanganwal-2LatalaUFR-48.8 Hz Sportking
M1/M247.9 Hz
220 kV Bus II
220 kV Bus I
66/11 kV T-2 66/11 kV T-5
D2 D2 D2
M1/M247.9 Hz
M1/M247.9 Hz
Bus-I will remain charged forredundancy of supply at Kohara
No Load – Except Railways
D2 – df/dt relay, already installed.
ix
RTP Sahnewal
220 kV Bus Bar
T-5, 100 MVA, 220kV/66 kVT1, 100 MVA, 220kV/66 kV
MahalauxmiAllied Industry Chaunta-BhainiSahib
Kohara (120- 90 = 30MW)
66 kV Bus Bar
T2, 66/11 kV T3, 66/11 kV T4, 66/11 kV T6, 66/11 kV
S1/S2Re-close
M1/M247.9 Hz
M1/M247.9 Hz
S1/S2Re-close
66 kV Lines will re-close (S1/S2 & S1/S2)at 50.5 HzTime delay in ‘ms’ between lines (30 MW)
Load of 66/11 kV Power T/F’s T-2 & T-6 is 30 MW
M1/M247.9 Hz
M1/M247.9 Hz
M1/M247.9 Hz
x
Gobindgarh-1 Malerkotla
220 kV Bus Bar
T3, 100 MVA, 220kV/66 kV
Tanda BadhaAmloh Road Gobindgarh
BhadsonUFR – 48.8 Hz17 MW
Amloh (137-17= 120 MW PADDY55 MW NON PADDY)
66 kV Bus Bars
Bimal AlloysNeelkanthModern 66/11 kV T-1 66/11 kV T-2
T4, 100 MVA, 220kV/66 kV
S1/S247.7 Hz
M1/M247.9 HzAt Malerkotla
Load Shedding schemes toBe installed for redundancy-Operation at 47.7 Hz withtime delay to sustain the island
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
xi
132 kV Bus Bar
16/20 MVA, 132kV/66 kV
Ropar
Morinda-1 Morinda-2
66 kV Bus Bar
Badali Mohali PTL Majri Dera Bassi Majra
100 MVA, 220 kV/66 kV 100 MVA, 220 kV/66 kV
220 kV Bus Bar
GGSSTP Mohali 1
Kharar (120 MW PADDY110 MW NON PADDY)
M1/M247.9 Hz M1/M2
47.9 Hz
xii
66kV Bus
220 kV Bus coupler220 kV Bus
Jalandhar-1 Jalandhar-2 Mahilpur
Sultanpur-1 & 2
Kotla Junga- 1 & 2Railway
M1/M247.9 Hz
M1/M247.9 Hz
M1/M247.9 Hz
M1/M247.9 Hz
M1/M247.9 Hz
100 MVA 220/66 KVPower Transformers (2)
Rehana Jattan
JamsherOnly Railway Load
GGSSTP Ropar Goraya
xiii
100 MVA, 220 kV/66 kV
220 kV Bus Bar Three UFR’s TO BE DISABLED DURING NON PADDY SEASON
66 kV Bus Bars
132 kV Bus Bar
25 MVA, 132 kV/33kV& 2 nos 20 MVA 132/11 KVPower Transformers
100 MVA, 220kV/132kVPOWER Transformers
Phillaur Nurmehal Nawan Shehar JamalpurRemains offfrom other end
Phagwara 1 & 2
Dosanjh Kalan Rurka Appra
33 KV Muthadda
GORAYA (75 MW NON PADDY LOAD)220 KV GGSSTP Ropar 220 KV Jamsher
M1/M247.9 Hz
xiv
11
(A State Govt. undertaking)
ISLANDING - II
GNDTP& GHTPISLANDING SCHEME
12
5.2 GNDTP, BATHINDA AND GHTP LEHRA MOHABAT ISLANDING SCHEME
This island shall include GHTP Lehra Mohbbat & GNDTP, Bathinda.
Initially two Units of GNDTP (2x110 MW) and three Units of GHTP Lehra
Mohabat (2x210 + 1x250MW) are proposed under stage-1 (when the
frequency comes down to 47.9 Hz). Total ex-bus generation equals to 800
MW considering availability of two units of GNDTP (2x110 MW) and three
units of GHTP Lehra Mohabat (2x210 + 1x250MW).The corresponding
average load for island scheme @ 80% of 800 MW comes to 640 MW. The
generation availability is considered as same during peak and off peak
periods.
DETAIL OF SUBSTATION WISE LOADS FALLING IN THE GNDTP-GHTPISLAND(S)
Details of sub stations wise load /feeders to be covered for load generation
balance in the island is as per Annexure-IIA
Name of S/S Avg. Load Summer Avg. Load Winter220 KV S/S GNDTP (Local Load) 105 MW (GNDTP) 75 MW(GNDTP)132 KV S/S IGC 55 MW(GNDTP) 45 MW(GNDTP)132 KV S/S Maur NA 40 MW(GNDTP)220 KV S/S GHTP (Local Load) 170 MW(GHTP) 130 MW(GHTP)220 KV S/S Himmatpura 135 MW(GHTP) 55 MW(GHTP)220 KV S/S Bajakhana 120 MW(GHTP) 55 MW(GHTP)220 KV S/S Barnala (PSTCL) 55 MW(GHTP) 40 MW(GHTP)220 KV S/S Mansa NA 125 MW(GHTP)220 KV S/S Jhunir NA 75 MW(GHTP)Total (GNDTP + GHTP) 640 MW 640 MW
13
DETAILS OF LINES TO BE OPENED UNDER GNDTP BATHINDA ISLAND-I
220KV GNDTP: Baluana Ckt (At Balluana) (remain in island during winter)132 KV IGC- Maur Line (at IGC S/S) (remain in island during winter)66 KV Vardhman (At IGC S/S) (remain in island during winter)66 KV Kot Shamir (At IGC S/S) (remain in island during winter)220 KV GNDTP: NFL 1 & 2 (remain in island during winter)220 KV GNDTP: MES220KV GNDTP: 220 KV Mukatsar-1 Ckt (At Muktsar)220KV GNDTP: 220 KV Mukatsar-2 Ckt ( At Malout)
DETAILS OF LINES TO BE OPENED UNDER GHTP ISLAND II
220KV GHTP: Mansa 1 & 2 (at Mansa) (remain in island during winter)220KV Bajakhana- Moga (Bajakhana end)220KV Bajakhana- Muktsar (Bajakhana end)220KV GHTP- Barnala (BBMB)220KV Barnala (PSTCL)- Barnala (BBMB)220 KV Barnala (PSTCL)- 220 KV Malerkotla Ckt (at Malerkotla)220 KV Mansa - 220 KV Refinery Ckt-1 and Ckt-2AT 220 KV BARNALA (PSTCL)66 KV Tapa66 KV Pakhoke66 KV Dhaula (UFR already installed)66 KV VarIndera66 KV Dhanaula 1 & 266 KV Abhishek66 KV Thuliwal (UFR already installed)66 KV Malwa66 KV Bus Coupler
Detail of lines to be opened and re-closed at various sub stations is as perAnnexure-IIB.
Detail indicating locations of relays is given as per schematic diagramattached as Annexure-IIC
Stage II Island Operations:
If the frequency further falls below 47.7 Hz, it is proposed to furtherdisintegrate this large island into two islands with each generating stationcatering to its connected load.
Page-(i)
Details of Load to be met :- Annexure-IIA
Sr.No. Name of Plant Details of area to be fed Summer
Load
Winter
Load
Relief
from
UFRs(in
MW)
Relief
from df/dt
relays(in
MW)
Relief
from SPS
(in MW)
G. Total
Load
relief(MW)
Net
Demand to
be met
Gross Total
Generation(MW)
Generation considered for
islanding purpose(MW)
(MW) (MW) Paddy
Load
Paddy
Load
Paddy
Load
Paddy Load (MW)
1(i) GNDTP,Bathinda 2x110-20=200 220KV S/S Bathinda (Local Load) 105 75 0 0 0 0 640
4x110=440MW 132KV S/S IGC 55 45 0 0 0
132KV S/S Maur NA 40
(ii) GHTP, LehraMohabat 2x210+1x250-70=600 220KV S/S LehraMohbat (Local
Load)
170 130 0 0 0
(920MW) 220KV S/S Himatpura 135 55 0 0 0
220KV S/S Bajakhanna 120 55 0 0 0
G. Total (i)+(ii) = 1360 G. Total (i)+(ii) = 800 220KV S/S Barnala(PSTCL) 55 40 0 0 0
220KV S/S Mansa NA 125
220KV S/S Jhunir NA 75
80% of G.Total = 640MW Total (MW) 640 640 0 0 0
2 GNDTP, Bathinda 160 220KV s/s Bathinda 105 75 0 0 0 0 160
4x110=440MW (i.e 80 % of 2x110) 132KV s/s IGC 55 45 0 0 0
132KV S/S Maur NA 40
Total (MW) 160 160 0 0 0
3 GHTP, LehraMohabat 480 220KV s/s LehraMohbat (Local
Load)
170 130 0 0 0
220KV Himatpura 135 55 0 0 0
220KV s/s Bajakhanna 120 55 0 0 0 0 480
(920MW) (i.e. 80% of (2x210+1x250-
70=600))
220KV s/s Barnala(PSTCL) 55 40 0 0 0
220KV S/S Mansa NA 125 0 0 0
220KV S/S Jhunir NA 75 0 0 0
Total (MW) 480 480 0 0 0 480
Page-(ii)
Details of Break-up of Load to be met :- Annexure-IIA
S.No Name of Substations Load (MW) BREAK-UP OF LOAD Load(MW)
Summer/Winter Summer/Winter
1 220 KV S/S GNDTP Bathinda 105/75 220/66KV 1X100 MVA T/F 70/45
66 KV C-Compound 15/10
66 KV MES(Cantt.) 20
2 132KV S/S IGC Bathinda 55/45 66 KV Dabwali Road 32/26
132/11 KV T/F 8/4
66 KV Vardhman 9
66 KV Kot Shamir 6
3 132 KV S/S Maur NA/40 132/66 KV T/F T-1 12
132/66 KV T/F T-2 12
132/66 KV T/F T-3 8
132/66 KV T/F T-4 8
3 220 KV Sub Station GHTP Lehra 170/130 66 KV Rampura 40/30
66 KV Phul 30/20
66 KV Blucho 25/20
66 KV Nathana 25/20
66 KV Bhai Rupa 35/27
66 KV Lehra Mohabbat 2/2
66 KV Vikram Cement 7/7
66 KV Balianwala 6/4
4 220 KV Sub Station Himmatpura 135/55 66 KV Ckt Bahadur 30/10
66 KV Ckt Bilaspur 30/12
66 KV Ckt Patto Hira Singh 25/8
66 KV Ckt Dina Sahib 20/10
66 KV Ckt Tallewal 20/10
220/66 KV T/F: T-2 10/5
5 220 KV S/S Bajakhana 120/55 66/11 KV T-2 9/4
66/11 KV T-3 10/6
66 KV Maluka 4/3
66 KV Jaito 24/10
66 KV Bhagta 38/20
66 KV Jeeda 15/5
66 KV Bargari 20/7
6 220 KV S/S Barnala PSTCL 55/40 66/11 KV T/F T-4 10/6
66/11 KV T/F T-5 15/11
66 KV Barnala Ckt. 30/23
7 220 KV S/S Mansa NA/125 66 KV Budhlada-1 8
66 KV Budhlada-2 8
66 KV Joga 8
66 KV Dhalewan 6
66 KV Bhikhi 10
66 KV Maur 15
66/11 KV T/F T-3 35
66/11 KV T/F T-4 35
8 220 KV S/S Jhunir NA/75 66 KV Sardulgarh 14
66 KV Aalike 11
66 KV Mansa 40
66/11 KV T/F 10
Page-(iii)
GNDTP BHATINDA AND GHTP LEHRA MOHABAT ISLAND : Lines/Bays to be opened & re-closed Annexure-IIB
S.No Name of Substations Details of Feeders to be disconnected (through
Relays M1, M2)
Details of Feeders to be disconnected
(through Relays S1, S2)
Remarks
1 220 KV S/S GNDTP Bathinda 220KV GNDTP: 132 KV Baluana Ckt 220 KV GNDTP: 220 KV GHTP Ckt-1
220KV GNDTP: 220 KV Mukatsar-1 Ckt 220 KV GNDTP: 220 KV GHTP Ckt-2
220KV GNDTP: 220 KV Mukatsar-2 Ckt (Malout) 220 KV GNDTP: 66 KV C-Compound
220KV GNDTP: 132 KV NFL-1 220 KV GNDTP: 66 KV MES(Cantt.) Tripping after time delay of 0.5 seconds
220KV GNDTP: 132 KV NFL-2 Tripping after further time delay of 0.5 sec (total 1 sec)
220KV GNDTP: 132 KV Cantt
2 132KV s/s IGC Bathinda 132 KV IGC: 132 KV Maur 132 KV IGC: 66 KV Dabwali This Ckt will be operative during winter season
132 KV IGC: 66 KV Kot Shamir -do-
132 KV IGC: 66 KV Vardhman(Mahavir) -do-
-do-
3 220 KV Sub Station GHTP Lehra
Mohabat
220 KV GHTP: 220 KV Barnala BBMB Ckt 66KV ckt BTI Thermal 1* * All 66 KV lines to be tripped by S-1/ S-2 relays at 47.7 Hz to
sustain the island
66KV ckt BTI Thermal 2*
4 220 KV Sub Station Himmatpura Nil 66 KV Ckt Bahadur**
66 KV Ckt Bilaspur**
66 KV Ckt Patto Hira Singh**
66 KV Ckt Dina Sahib**
66 KV Ckt Tallewal**
220/66 KV T/F: T-2**
** These lines will be reclosed at 51.00 Hz
5 220 KV S/S Bajakhana 220 KV Bajakhana: 220 KV Ckt Mukatsar Nil
220 KV Bajakhana: 220 KV Ckt Moga Nil
6 220 KV Sub Station Barnala PSTCL 220KV Barnala : 220KV Malerkotla ckt 1 66/11KV KV T/F: T-4*
220KV Barnala : 220KV Malerkotla ckt 2 66/11KV T/F: T-5*
220KV Barnala(PSTCL)-220KV Barnala(BBMB) 66 KV Ckt Barnala*
220KV Barnala : 66 KV Pakhoke Ckt
220KV Barnala : 66 KV Tapa Ckt
220KV Barnala :66KV Ckt Varindra
220 KV Barnala: 66 KV Abhishek
220KV Barnala : 66 KV Malwa ckt
220KV Barnala : 66 KV Bus coupler
7 220 KV S/S Mansa 220 KV Mansa: 220 KV Refinery Ckt-1 Nil
220 KV Mansa: 220 KV Refinery Ckt-2
220 KV Mansa: 220 KV GHTP Ckt-1 220 KV Ckt will be operative during winter season
220 KV Mansa: 220 KV GHTP Ckt-2 -do-
7 220 KV S/S Jhunir (for Winter) 220 KV Jhunir: 220 KV Mansa Nil
66 KV lines to be tripped, if required after time delay of 300 milli-
seconds upto 2 seconds at 47.7 Hz to provide stability
132KV Baluana, NFL-1,2, Cantt & 132 KV IGC Ckts will remain
operative during winter season
* All 66 KV lines to be tripped by S-1/ S-2 relays at 47.7 Hz to
sustain the island
220 kV Bus Bars132 kV Bus Bars
66 kV Bus Bars
66 kV Bus Bar
40/50 MVA, 132kV/66 kV25 MW
16/20 MVA, 132kV/66 kV10 MW
IGC
Cantt NFL-2 NFL-1 Balluana
Auto T/F
Auto T/FLeh-2 Leh-1 Muktsar Malout
100 MVA, 220kV/66 kV70 MW
B.C. B.C.
GNDTP (160 MW) Islanding Scheme
M1/M247.9 Hz
S1/S247.7 Hz
M1/M247.9 Hz
M1/M247.9 Hz
M1/M247.9 Hz
M1/M247.9 Hz
M1/M247.9 Hz
M1/M247.9 Hz
Maur
Installed at IGC S/S
66KV Kot Shamir 66 KV Mahavir 66 KV Dabwali RoadS1/S2 at 47.7 Hz32 MW
132 KV IGC132/11 KV (8 MW)
66 KV C-Compound (15 MW)At 47.7 Hz with TD of 0.5secSI/S2
66 KV MES (20 MW)At 47.7 Hz with TD of 1 secS1/S2
S1/S247.7 Hz
M1/M247.9 Hz
M1/M247.9 Hz
Coupling
All these relays will be disabled in non paddyseason
All these relays will be disabled in non paddy seasoniv
Annexure-II C
220 kV Bus Bars
66 kV Bus Bars
Bhucho
B.C
T1, 100 MVA, 220kV/66 kV85 MW
Phul
Lehra Mohabbat – Island of 480 MW(Local Load170 MW PADDY & 130 MW NON PADDY)
T2, 100 MVA, 220kV/66 Kv85 MW
B.C
B.C
Himmatpura167.5 MW
Mansa 1 Mansa 2 Himmatpura 267.5 MW
PSTCL, Barnala55 MW
BTI Thermal 1S1/S2 47.7 HzBajakhana 1
60 MW BBMB, BarnalaBajakhana 260 MW
BTI Thermal 2S1/S2 47.7 Hz
Rampura Nathana Bhai RupaLehraMohabbat
VikramCement Balianwala
M1/M247.9 Hz
M1/M247.9 Hz
At Mansa endTo be disabled innon- paddy season
v
Lehra 2
220 kV Bus Bars
66 kV Bus Bars
Dina Sahib
B.C
T3, 160 MVA, 220kV/66 kVT1, 100 MVA, 220kV/66 kV
Bhadaur BilaspurPatto HiraSingh Tallewal
Himmatpura (135 MW PADDY55 MW NON PADDY)
Lehra 1
66/11 kV T-2
S1/S247.7 Hz
S1/S247.7 Hz
S1/S2Re-close
66 kV Lines will re-close (S1/S2) at 51.0 Hz- Reclosing load to be 4 to 5 MW66 KV lines will trip after delay at 47.7 Hz
S1/S2Re-close
S1/S2Re-close
S1/S247.7 Hz
S1/S247.7 Hz
S1/S247.7 Hz
vi
220 kV Bus Bar
66 kV Bus Bar
T1, 100 MVA, 220kV/66 kV
Bajakhana (120 MW PADDY56 MW NON PADDY)
T2, 100 MVA, 220kV/66 kV
GHTP 1 Mukatsar Moga
Maluka Jaito Bhagta Jeeda Bargari12.5 MVA, 66 kV/11 kV
12.5 MVA, 66 kV/11 kV
GHTP 2
M1/M247.9 Hz
M1/M247.9 Hz
vii
220 kV Bus Bars
66 kV Bus Bars
Dhanaula-1
B.C
T1, 100 MVA, 220kV/66 kV
Varindra
PSTCL, Barnala (190 MW= 135+55NET 55 MW PADDY & 40 MW NP)
T2, 100 MVA, 220kV/66 kV
B.C at 47.9 HzM1/M2
Malerkotla 1 Malerkotla 2 BBMB, Barnala
Dhanaula-2ThuliwalUFR- 48.8 Hz Abhishek Malwa Barnala
T1, 100 MVA, 220kV/66 kV Pakhoke DhaulaUFR- 48.8 Hz
Tapa
M1/M247.9 Hz
M1/M247.9 Hz
66/11 kV T-566/11 kV T-4
M1/M247.9 Hz
M1/M247.9 Hz
M1/M247.9 Hz
M1/M247.9 Hz
At Malerkotla end
S1/S247.7 Hz
S1/S247.7 Hz
M1/M247.9 Hz
M1/M247.9 Hz
M1/M247.9 Hz
S1/S247.7 Hz
M1/M2 47.9 HzAlong withPSTCL bussectionalizing220 KV breaker
viii
220 kV Bus Bars
66 kV Bus Bars
Dhalewan
B.C
T1, 100 MVA, 220kV/66 kV
Joga Bhikhi
Mansa (125 MWNon Paddy load Only)
Lehra 2Lehra 1Refinery Ckt. 2Refinery Ckt. 1Jhunir Sunam
BudhladaCkt-1
Maur
BudhladaCkt-2
T2, 100 MVA, 220kV/66 kV
66/11 kV T-3 66/11 kV T-4
T5, 100 MVA, 220kV/66 kV
M1/M247.9 Hz
M1/M247.9 Hz
M1/M247.9 Hz
M1/M247.9 Hz
Relays to be disabledIn non paddy season
ix
220 kV Bus Bar
100 MVA, 220 kV/66 kV
B.C
66 KV Mansa
66 kV Bus Bars
M1/M247.9 Hz
SunamMansa
Sardulgarh Aalike
JHUNIR75 MW
NON PADDY LOAD
20 MVAPower T/F
x
14
CHAPTER-6
6.0 PROPOSED ACTION PLAN FOR SUCCESSFULIMPLEMENTATION AND SURVIVAL OF ISLANLANDINGSCHEME
The islanding scheme is designed for a typical load-generation balance undersummer and winter load scenario. However, considering system dynamicsand actual load conditions, it creates un-certainties in the survival of theislands. Initially the islanding scheme as discussed in Chapter-5 can beimplemented with the deployment of frequency sensing relays but additionalmeasures would be required over a period of time to enhance success rate ofislanding scheme.The following steps are proposed to be taken to enhance probability ofsuccess & survival of islanding scheme:-
6.1 Deployment of Numerical Relays.
State of the art Numerical relays (Under frequency cum df/dt) shall beprovided at the identified locations, which shall have faster response time.The existing static UFR & df/dt relays at the Island locations shall also bereplaced with digital numerical relays. The relay shall be capable to integratewith existing/upcoming optical fiber communication network , under ULDCscheme. Detailed Technical specifications and Bill of Material is given asAnnexure III & IV respectively.
6.2 Intelligent System for Load Shedding & Remote Monitoring.
An intelligent system through existing or stand alone SCADA system will beimplemented to continuously monitor the generation (including governorresponse of the generating units) and load at sub stations forming part ofrespective island (s), on real time basis and decision in the formation of islandas well as during the restoration process. The intelligent system shall havecentral control and command centre at SLDC The system will necessarilyrequire optical fiber based communication network. Such intelligent systemwould enhance the reliability of formation of islands. Detail status ofconnectivity & RTUs installed at Substations is given as per Annexure-V.Till such time the above intelligent system is developed, the proposed schemebased on Numerical Relays shall be in place.
15
6.3 Network & Simulation Studies.
To assess stability and re-validate the formation of proposed islands underdifferent scenario, Dynamic network simulation studies and stability analysiswould be required beforehand. The study would analyze degree of swings inthe bus voltages, line flows and relative rotor angles, etc. The studies wouldalso suggest any additional measures to be taken for enhancing success rateof islanding. Line network diagram of system showing boundary of islands isgiven as Annexure VI.
6.4 Regular preventive Maintenance.
In order to ensure reliability of the island, regular preventive maintenance ofcontrol switchgears, relays & protection system and governors at each of thegenerating units, as covered in the scheme, shall be carried out by therespective agencies.
6.5 Additional Requirements:
Any additional provision to meet with the functional requirements of theScheme shall be incorporated during implementation stage.
6.6 Periodic Review of islanding scheme.
The islanding scheme shall be reviewed periodically, at least once a year, bythe SLDC in consultation with the utilities. Changes in system topology,loading conditions, generation/demand growth, etc shall be reviewed andnecessary changes in the islanding scheme shall be made accordingly.
6.6 Training and mock drills
The detailed procedures/instructions shall be developed and training shall beimparted to the System Operators at SLDC and other personnel involved atthe sub stations and generating stations. A detailed mock drills shall beconducted regularly, at least once in a year. SLDC shall co-ordinate thisactivity with the utilities.
16
CHAPTER-7
7.0 MAJOR CHALLENGES AND WAY FORWARD
7.1. The islanding scheme has been framed considering the current power
scenario in summer /paddy and winter season. Whereas system is heavily
loaded and most vulnerable to instability and grid disturbance during summer
peak period ( June-Oct), the system is equally vulnerable during winter
season particularly under foggy conditions ( Dec-Feb), as experienced in the
past. To make the islanding scheme suitable for all possible power scenario
through out the year and changes in the network, this shall require a regular
review and re-adjustments.
7.2. Maintaining the island will require continuous actions to regain and thereafter
maintain load generation balance in the respective islands. Since frequency
excursion in islands are expected to fast paced, these actions will
permanently be ensure automatically through time delay feature.
7.3 Presently RFGMO at the generation stations operates within limit of +/- 5%,
as per the IEGC which is already built in the control system of
generator/Turbine. In case of wide range of variation of frequency control
,under proposed islanding mode, one generating unit will have to be operated
on frequency control mode, for which assistance of BHEL(OEM) is required.
7.4 Introducing time delay of 5 seconds in the frequency tripping of generating
units included in the islands shall enhance success rate of islands.
7.5 Training and Mock Drills at SLDC, sub stations and Generating Stations to
familiarize for handling real time situation during grid disturbance.
7.6 During the islanded operation of system, Punjab SLDC at Ablowal, Patiala will
be the nodal agency who will have the overall responsibility of co-ordination &
operation of the islanded systems with various agencies like generating/
distribution licensees (PSPCL/IPPs), BBMB and POWERGRID etc. Punjab
SLDC will follow instructions issued by NRLDC.
17
ANEXURE III
TECHNICAL SPECIFICATION OF UFRs :
The broad technical specification of islanding relays for the proposed load
shedding scheme is as under:
a. Rating:
The rated auxiliary voltage : 220V + 5% (D.C).,
The rated system frequency: 50 Hz
Nominal voltage : 110V (A.C). Phase-Phase from P.T’s.
b. Operating frequency range : 45 to 55 Hz in steps 0.1 Hz with accuracy + 10 mHz.
c. Under Voltage block at 40% of P.T. Voltage.
d. Recovery function: Frequency difference from set value 0.1 to 2.0 Hz. Resetting
time – 15 Sec. to 15 minutes. Accuracy + 1%.
e. The relays should be immune to harmonics & transients.
f. It should have feature to self monitor. It should also be possible to monitor the
relay from remote.
g. The relay should have at least 4 levels of settable under frequency levels.
h. The relay should have at least 2 levels of settable over frequency levels.
i. The relay should have three load shedding stages for df/dt function and each
stage should have setting range of 0.1 to 3 Hz (incremental in steps of 0.1
Hz/Sec).
j. The each output contact of relays shall be configurable based on frequency
whether over and under frequency values.
k. The relay shall be IEC 61850 Compliant and shall communicate with SCADA
system located at a remote location through owner communication network
through 2mbps Ethernet port.
l. The relay shall have at least four (4) voltage inputs where PT can be
connected directly without any additional interfacing equipment.
m. The relay shall have at least 12 status input and 6 trip output contacts to trip
at least 6 feeders & monitor Main & Tie CBs of these 6 feeders. The output
contacts shall be wired to self reset heavy duty trip relays to trip Main & Tie
18
CBs & send direct trip command to remote end. Heavy duty trip relay shall
have at least 8 contacts.
n. The relay shall monitor the operation of circuit breaker through its auxiliary
contacts.
o. The accuracy of Frequency measurement shall be 1% or better.
p. Suitable LED’s for indications of Tripping, Alarm & Healthy condition.
q. The relay shall have self-supervision function.
r. The maximum operating time (including tripping time) should not exceed 50ms.
s. If the relay or its LED’s or contacts are programmable, they would be programmed by
the firm according to PSTCL requirements / drawings before delivery.
t. The relay shall be capable of fault recording which shall record all analogue
and digital data wired to relay.
u. The relay shall have time synchronising feature using SNTP and IRIG B both.
v. 2 nos. under frequency relays from different makes are envisaged for each
EHV station which will be connected to bus CVT/PT separately to have
redundant relaying system.w. One spare contact of the U/F islanding relay/trip relay shall be wired to existing RTU /RMU
in the substations of the Islanding scheme for intimation of Islanding commencement to
RLDC/SLDC
19
Annexure IV
BILL OF MATERIAL (UFRs)
Name of Sub-station Relays M1 Relays S1 Total for each S/S
GGSSTP, Ropar 1 0 1
G-1 & G-4 1 4 5
G-2 1 2 3
G-3 0 3 3
GNDTP 2 2 4
IGC Bathinda 1 1 2
Himmatpura 0 2 2
Mansa 1 0 1
Sahnewal 1 0 1
Kohara 1 1 2
Amloh 0 2 2
Kharar 1 0 1
BBMB, Barnala 1 0 1
Bajakhana 1 0 1
PSTCL, Barnala 3 1 4
Jhunir 1 0 1
Mohali, Malerkotla 2 2
Goraya, Jamsher 3 3
TOTAL M1 21
TOTAL M2 21Total S1 18Total S2 18Net Total 7820% extra 16TOTAL 94
20
Annexure-VI
Status of Connectivity & RTU availability at locations under Islanding Scheme
S.No. Name of Sub-Station SCADA/RTU
AvailabilityOptical FiberConnectivity Remarks
1. 220 KV S/S GGSSTPYes
(C-DAC) Yes RTU underupgradation
2. 220 KV S/S G-1 & G-4 Yes(C-DAC) Yes
3. 220 KV S/S G-2 Yes(Areva)
Approved
4. 220 KV S/S G-3 No Approved DFE make RTUalready ordered
5. 220 KV S/S Amloh No Yes DFE make RTUalready ordered
6. 220 KV S/S Kharar No Approved DFE make RTUalready ordered
7. 220 KV S/S Kohara No No DFE make RTUalready ordered
8. 220 KV S/S Sahnewal Yes(Areva)
No
9. 220 KV S/S Jamsher Yes(C-DAC)
Yes RTU underupgradation
10. 220 KV S/S Goraya Yes No
11. 220 KV S/S GNDTP Yes(C-DAC)
Yes RTU underupgradation
12. 220 KV S/S GHTP Yes(ABB)
Yes RTU underupgradation
13. 132 KV IGC No No
14. 132 KV Maur No No
15. 220 KV Himmatpura No No UnderCommissioning
16. 220 KV Bajakhana No No UnderCommissioning
17. 220 KV Barnala Yes(DFE)
Yes
18. 220 KV Mansa Yes(Areva)
No
19. 220 KV Jhunir No No UnderCommissioning
3*66MW(NHPC)
BAIRASIUL(HP)(PSEB)SHAHPURKANDI
JASSORE(HP)
6*60MW(BBMB)
(HP)PONG
(PSEB)RSD
HIRANAGAR(J&K)
SARNA
TIBBER
DASUA
MAJITHA
F.G.Ch.
KARTARPUR (PSEB)
WADALAGR. KHASA
BALA CHAK
VERPALTOHAMIRPUR
KANJLI(KPT)
C.L.ASR
K.S.MALLI
6*115MV(NHPC)
SALAL(J&K)
JAMMU
KISHENPUR
WAGOORA
PAMORA(J&K)(J&K)
U.PUR(J&K)
(NHPC)
(NHPC)
(PGCIL)
(PGCIL)
(PGCIL)
(PGCIL)
KISHENPUR
KANGRA
KANGRA(HP)HAMIRPUR(HP)
SHANAN
PATHANKOT
SARNA
BASSI
CHOHALMAMUN
ASHP(GANGUWAL)
MAJARA
NAKKIAN
JADLA
GURDASPUR
DHARIWAL
BATALAHOSHIARPUR
MHP-1
MHP-2
MHP-3MHP-4
(PSEB)
(PSEB)
(HPSEB)
(PSEB)
(PSEB)TO KARTARPUR
DEHAR
BHAKRA(R.B.) BHAKRA(L.B.)
GANGUWAL
DEHARPANIPATBHIWANI
CHAMERA(HP)
GANGUWAL
AMBUJAR.T.P.
TO JAGADHRY(HR.)TO DHULKOT(HR.)
(BBMB)
(BBMB)
(BBMB)
(BBMB)
(BBMB)
(BBMB)
(BBMB)
HAKIMAGATE
WADALAGRANTHIAN
KATHUNANGAL
VERKA
TANDA
BHOGPURSHRIHAR-GOBINDPUR
JAINTIPUR
P.COLONYC.L.ASR MALL
MANDI(LOHARKA)
(PAKHAR WALA)
GT.ROAD ASR.NARAINGARH
VERPALSAKATRIBAG(PGCIL) KARTARPUR(JAL)
TARN TAARAN
KISHAN PUR
ALAWALPUR
JANDIALA
TANGRA
EKALGADDA
BHIKHIWIND
PATTI
SULTANPUR
RASHIANA (TARANTARAN)
PATTIKOTLAJUNGA
(PGCIL)
(PGCIL)
RCFSCIENCE
KHERAMANDIR
KAPURTHALA
CITYCHILDRENPARK
BUTARI
DERABEAS
KARTAR PUR
DHILWAN
JALANDHER-1
RAILWAY
BUTARI
ALGAON
SULTANPUR
(RAILWAY)CHAHERU
JAMSHER(JAL.-2)
1*250 MVA
PATIALAFAGAN MAJRA
2*315MVA
4X150MVA
(PGCIL)BALA CHAK2*315MW
JALANDHAR-1(BBMB)
KOTLA
ROPAR
ASRONMAX
INDIADCM
BILASPURCHAMKAURSAHIB SIHORA
SAMSPURA
RAILWAYKURALI
GOBINDGARH-1
GOBINDGARH-2
AMLOH ROADGOBINDGARH
DORAHA
GHULALMES
N.F.L.
IGC ABOHAR BALUANAGIDARWAHA
BADALMAUR
MUKTSAR(OLD)
MUKTSAR
SARAINAGA MUKTSAR(NEW)
KOTKAPURA-1KOTKAPURA-2
JALALAWAD
GUBHAYA
MALOUT
MALOUT
TO MANSA
DHARAMKOT PANJGARIAN
BADHNIKALAN
MOGA-2
GHOLIANKALAN
BAGHAPURANA
FARIDKOT
SADIK
BAJAKHANABARNALA
AJITWAL
JAGRAON
SADIK
BOTIANWALAMASTEWALA
FEROZPUR
MOGA(PGCIL)
(BBMB)
MOGA
SMADH BHAI
BAGHAPURANA
MOGA
3*100MVA
2*90MVA
KHARAR
6*210MV(PSEB)R.T.P.
TONALAGARH(H.P.)
RAJPURAPATRAN
RAILWAY
DERABASSI
LALRUMOHALI-II
MOHALI
MAJRA
BAHADURGARH
FAGAN
RAJLA
ABLOWAL (PATIALA)
KOHARAAMLOH
SAHNEWAL
RAILWAY
BATHINDA2*110MW
2*210 MWG.H.T.P.(PSEB)
HIMATPURA
MANSA
JHUNIR
SUNAM
DHURI
BARNALA(PSEB)
MALERKOTLA
MALERKOTLA
(PSEB)
(PGCIL)
(PGCIL)
TO FAGANMAJRA
(NTPC)
2*315MVAMALER KOTLA
TO DADRI
SANGRUR
(PGCIL)
PAKHOWAL
FZR.RD.LDH
FEROZESHAH
TALWANDIBHAI(KOT KROR)
FEROZPUR
LALTON KALAN
LUDHIANA (PGCIL)
HAMBRANJAMALPUR
DHANDARIKALAN
2*315MVA(PGCIL)LUDHIANA
(BBMB)
(BBMB)
(PGCIL)
23
100MVA
MAHILPUR
NAWANSHAHAR
MAHILPUR
BANGA
PHAGWARA
GORAYA
NURMAHALNAKODER
URBANESTATE JAMALPUR
SWADIKALAN
SOSAN
MOGA-1(OLD)
MOGA(NEW)
2*110MW(UNIT#1&2)BATHINDA(PSEB)
TO MAUR
(PSEB)
H
H
H
H
H H
HH
H
H
H
H
H
H
H
H
H
HH
H
H
H
T T
T
T
100MVA
100MVA
100MVA
1*100MVA
2*100MVA
3*100MVA
2*100MVA
2*315MVA
100MVA
2*90MVA
100MVA
2*100MVA
2*100MVA
3*100MVA
2*100MVA
100MVA
100MVA
(0.4 SQ.")
(BBMB)
LINE NETWORK DIAGRAM FOR POWER SYSTEM OF PUNJAB
220KV LINE765KV LINE132KV LINE
400KV LINE
RAILWAY
IKOLAHA
ISLAND-1GGSSTP
ISLAND-2GNDTP &GHTP
Annexure-VI
22
23
24
25
27
Appendix-IIIA( Sh 1 of 4)
Detail of Under Frequency Relays (UFR) installed at Grid Sub-Stations.Sr.No.
Name of S/Station Name of Feeder Load Relief in MVA
P&M Circle Amritsar1 2202KV Khassa 66KV Attari 252 220KV Patti 66KV Chohla Sahib
66KV Sarhali25
3 220KV Fatehgarh Churian 66KV Ajnala66KV Ram Dass66KV Jhander66KV Wadala Veeram
35
4 220KV Wadala Granthian 66KV Udanwal 215 220KV Tibber 66KV Purana Shalla 76 220KV Kotli Surat Mali 66KV Shahpur Goraya 6
P&M Circle Jalandhar7 132KV Banga 66KV Rehana Jattan, 66KV Behram 65MVA8 132KV Jadla 66KV Balachour & Kerawar line 70MVA9 132KV Nawanshahar 66KV Aur & Rahon 50MVA10 220KV Kartarpur 66KV Nadala Hamira & Mustfapur 45MVA11 220KV
Kotla Janga66KV Malsian Alewali, Shahkot,Malian & Cap, Bank
153.5MVA
12 132KV Bhogpur 33KV Kandhala Jattan & 33KV Bholath 34 MVA13 132KV Nakodar 66KV Shanker.
( UFR relay is installed on 66KVShanker feeder was shifted on 220KVKotla Janga on 26/6/12)
32.5 MVA `
P&M Circle Patiala14 220KV S/S Ablowal 66KV Lung 10.2915 220KV S/S Bahadurgarh 66KV Ghanour 22.86
16 132KV Ropar 66KV Bahlolpur 7.42017 220KV S/S Patran 66KV Moonak 68.587
18220KV S/S Sunam
66KV Chajli 43.4466KV Cheema 42.75
19 220KV S/S Dhuri 66KV Kanjla 1820 220KV S/S Barnala 66KV Dhaula, Thuliwal 37.521 220KV Malerkotla -
P&M Circle Bathinda22 220KV S/S Mansa 66KV Budhhlada ckt-I
66KV Budhhlada ckt-II,66KV Bhikhi line,66KV Dhelwala line
32 MVA32MVA
28.57MVA28.57MVA
23 220KV S/S Botianwala 100MVA T/F, 220/66KV I/C 66KVside
45 MVA
24 220KV S/S Ghubaya 66KV Ladhuka 92.5MVA25 220KV S/S Sadiq 66KV I/C I&II 63.8MVA
28
26 132KV S/S Malout 66KV Abulkhurana 33MVA
27 132KV S/S Abohar 33KV Khuhi Khera line Br, out of ckt28 132Kv Kotkarore 66KV Mudki line 37.5MVAP&M Circle Ludhiana29 132KV Doraha 132KV Bilaspur-Sihora line, 66KV
Payal Chawa line, Setco line68MVA
30 220KV Sahnewal 66KV Latala 20.5MVA31 132KV Sawadi 132/11 T/F T-1 20 MVA32 220KV Jagraon 66KV Sidhwan Bet & Rasulpur &
Raikot55MVa
33 220KV Gobindgarh-I 3No, 220/66KV T-1, T-2&T-3 226MVA34 132KV Amloh 66KV Bhadson line 55MVA35 220KV Dhandari-I 2x100MVA 220/66KV side 184MVA36 220KV Goraya 33KV Apra & Dosanj Kalan 55MVA37 220KV S/S Gobingarh-III 66KV Chaurwala 50MVA
29
Appendix-IIIB( Sh 3 of 4)
Detail of df /dt Relays installed at Grid Sub-Stations.P&M Circle AmritsarSr.No.
Name of S/Station Name of Feeder Load Relief inMW
1. 132 KV Bhikhiwind - 482. 132 KV Tarn Taran 1) 66 Kv Chola Sahib
2) 66 KV Manochahal62
3. 132 KVTangra - 114. 132 KV Jandiala Guru - 135. 132 KV Ekal Gadda - 66. 132 KV Dhariwal 66 KV Naushera Majja Singh 127. 132 KV Naraingarh 1. 66 KV OCM Ckt.I
2. 66 KV OCM Ckt.II3. 66 KV Gowal Mandi4. 66 KV Sarai Amanat Khan5. 66 KV Hall Gate
54
8. 220 KV Civil Lines, Asr 66 KV Harsha Chhina 39P&M Circle Jalandhar9 220 KV S/Stn. Jamsher 66KV Daulatpur 50
10 132 KV S/Stn. Nurmehal - 32
11 132 KV S/Stn. Hoshiarpur 66KV Sadhu Ashram,66KV Sham-84, 66KV Attowal,
66KV Nasrala, 66KV Focal Point
33
12 132 KV Bhogpur - 28
13 132 KV Tanda - 13
14 132 KV Alawalpur - 8
15 220 KV Sultanpur 66KV Lohia, 66KV Jakhubal, 66KvBhagobudda,
66KV Talwandi Madho,66KV Talwandi Chaudhrian
47
16 132 KV Kheramandir - 32
17 132 KV Kapurthala - 17
18 132 KV Dhilwan - 8
P&M Circle Patiala19 220KV S/S Rajpura 66KV Gajjukheran Sirhind, Rajpura old,
Dharamgarh90
20 220KV S/S Derabassi 66KV Wnsone yarn, Lalru, rama petro,Nahar export, Mubarkpur
91
21 132KV Chamkaur Sahib 11KV feeders 1622 132KV Anandpur Sahib 11KV feeders 20
P&M Circle Bathinda
30
23 132KV Sadiq 66KV Golewala66KV Sukhanwala66KV Guru Har sahal66KV Jhoke Tehal Singh66KV Deep Singh wala
67
24 132KV Maur 66KV Talwandi Sabo66KV Jodh pur66Kv Joga Ralla
30
25 132KV Sarainaga 20/10/10MVA, 132/33/11KV P/T/FControlling33KV Wara Kishanpura11KV Khokhar11KV Waring11KV Hari ke Kalan11KV Baja Marar
8
26 132KV Abohar 33KV Kaller Khera33KV Khulan Sarwar33KV Amar pura33KV Abohar
34
27 132KV Mukatsar 66KV Fattan Wala66KV Rupana66KV Malout Road
20
28 220KV Moga 132KV Dhale ke132KV Smadh Bhai132KV Panjgarain
99
P&M Circle Ludhaiana29 220KV S/S Hambran 66KV FZR Road Ldh-I&II
66KV Hambran109
30 220KV S/S Gonindgarh-II 66KV Badinpur, 66KV Central S/S,66KV Grain Markit
52
31 220KV S/S Sahnewal 66KV Kanganwal-I&II, 66KVSahnewal-I&II, 66KV Avery feeder,66KV Sport King
130