final grid code

7/27/2019 Final Grid Code

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CODES & STANDARDS: KERC - 1 -

KARNATAKA ELECTRICITYREGULATORY COMMISSION

GRID CODE,DISTRIBUTION CODE,

STANDARDSFOR

TRANSMISSION SYSTEMAND

DISTRIBUTION SYSTEM

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KARNATAKA ELECTRICITY REGULATORYCOMMISSION



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GRID CODE



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GRID CODE

CONTENTS

SECTION + . INTRODUCTION %0.3

S#5t!o( + ' DEFINITIONS .022

S#5t!o( + 2 MANAGEMENT OF GRID CODE 2302%

S#5t!o( + 3 SYSTEM >LANNING 3-07'

S#5t!o( + CONNECTION CONDITIONS 7201'

S#5t!o( + 6 O>ERATION >LANNING ANDSECURITY

120%7

S#5t!o( + 7 SYSTEM O>ERATION,METERING, >ROTECTION,DES>ATC AND CONTROL

%10.-2

S#5t!o( + 1 MONITORING OF GENERATIONAND DRA9AL

.-30.-7

S#5t!o( + % CONTINGENCY >LANNING .-10..2

S#5t!o( + .- CROSS BOUNDARY SAFETY ..30..6

S#5t!o( + .. SAFETY AND LINE CLEAR>ERMITS

..70.'

S#5t!o( + .' COMMUNICATION AND DATAACUISITION

.'60.'1

S#5t!o( 0 .2 O>ERATIONAL EENT,INCIDENTACCIDENTRE>ORTING

.'%0.23

S#5t!o( 0 .3 DATA REGISTRATION .20.21



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GRID CODE

SECTION0.

INTRODUCTION

.8. I(tro)


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i. "entral Electricity *uthority4

ii. "entral Transmission Utility4

iii. Southern &egional Electricity Board4

i'. State #o'ernment4

'. #enerating "omanies4

'i. 2istribution 3 &etail Suly icensees4

c. Suer'ision and control of the State Power #rid4

d. "omlying with, and ensure comliance by others in the State, the

directions the "entral Transmission Utility may gi'e from time to

time in resect of matters affecting the integrated grid oeration of

InterState Transmission System.

1.1.5 In order to erform the abo'e tas, The +arnataa Electricity &egulatory

"ommission has formulated this KARNATAKA ELECTRICITY GRID

CODE. This #rid "ode is alicable for the +arnataa Power #rid only

and for the Inter State Transmission, Indian Electricity #rid "ode shall be

alicable.

.8' Strla((!(* 5o)# 0 Secifies the technical and design

criteria and the rocedures to be alied by the State Transmission Utility

and other Users for lanning and de'eloment of the Power System.



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1.).: S#5t!o(0/ Co((#5t!!t; Co()!t!o(s 0 Secifies the technical criteria and

standards to be comlied with by the Transmission icensee, the

#enerating "omany, the 2istribution 3 &etail Suly icensees and

other Users connected or seeing connection to the Transmission System.

1.).; S#5t!o(06/ O?#rat!o( >la((!(* a() S#5ormulates the

rocedure to be followed by the State oad 2esatch "entre for

monitoring the #eneration 7utut, *cti'e and &eacti'e reser'e caacity

re8uired for e'aluation of the erformance of Power Plants. Themonitoring of scheduled drawal is imortant to ensure that the

Transmission icensee contributes towards imro'ing the &egional

erformance, by obser'ing #rid disciline.

1.)./ S#5t!o(0%/ Co(t!(*#(5; >la((!(* 0 >ormulates the reco'ery and

normali?ation of ower suly rocess to be followed by all the Users in

the e'ent of the failure of +arnataa Power #rid, or the Southern #rid

resulting in total or artial collase of the System causing blacouts.

1.).10 Se5t!o(0.-/ Cross Bo


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the wor is carried out on electrical e8uiment connected to another

User@s System.

1.).11 S#5t!o(0../ Cominimum re8uirements of "ommunication and 2ata *c8uisition >acilities

to be ro'ided by each User at interconnection oints and cross boundary

circuits.

1.).1) S#5t!o(0.'/ O?#rat!o(al ##(t a() I(5!)#(tA55!)#(t R#?ort!(* 0

Secifies the details of minimum re8uirement for the e9change of

information relating to 7erations andAor E'ents on the total System

including the Southern #rid which may ha'e an oerational effect.

1.).15 S#5t!o(0.2/ Sa@#t; a() L!(# 5l#ar >#r!ts Sets out the rocedure for

recording of ine "lear Permits and guidelines for ensuring safety from

electrical ha?ards to the consumers, general ublic and woring

ersonnel.

1.).16 S#5t!o(0.3/ Data R#*!strat!o( 0 Secifies a list of all the data re8uired by

the Transmission icensee which is to be ro'ided by the Users and the

data re8uired by the Users to be ro'ided by the Transmission icensee

at the re8uired time secified in the 'arious Sections of the #rid "ode.

.82 I?l##(tat!o( a() o?#rat!o( o@ th# Gr!) Co)#/1.5.1 The State Transmission Utility shall be resonsible for imlementation of

the #rid "ode. *ll the Users shall comly with the #rid "ode and assist

the State Transmission Utility in this regard. The Users must ro'ide all

the re8uired information and reasonable rights of access, ser'ice and

facilities necessary for imlementation of the #rid "ode.

1.5.) If any User has any difficulty in comlying with any of the ro'isions of the

#rid "ode, he shall immediately, without delay, inform the same to the

State Transmission Utility and shall remedy his noncomliance romtly.

1.5.5 "onsistent failure in comliance with the #rid "ode may lead to

disconnection of the Users lant or *aratus.



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1.5.6 The oeration of the #rid "ode shall be re'iewed regularly by the #rid

"ode &e'iew Panel in accordance with the ro'isions of the rele'ant

Section of the #rid "ode.

.83 L!!tat!o(s o@ th# Gr!) Co)#/

1.6.1 The #rid "ode contains rocedures for the management of day to day

technical situations in the Power #rid, taing into account a wide range of

oerational conditions liely to be encountered under both normal and

abnormal conditions.

1.6.) The #rid "ode cannot foresee all the ossible oerating conditions. Users

must therefore understand and accet that the Transmission icensee, in

such unforeseen circumstances, may be re8uired to act decisi'ely to

discharge his obligations under the icense. Users shall ro'ide such

reasonable cooeration and assistance as the Transmission icensee

may re8uire in such circumstances.

.8 >ro5#)


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SECTION0'

DEFINITIONS

In the #rid "ode the following words and e9ressions shall, unless the subDect

matter or conte9t otherwise re8uires or is inconsistent therewith, bear the

following meanings

*ct The +arnataa Electricity &eform *ct, 1///.

*cti'e Energy The electrical energy roduced, flowing or sulied by an

electric circuit during a time inter'al, being the integral with

resect to time of the instantaneous ower, measured in

units of watthours or standard multiles thereof, i.e.,

1000 h F1 h

1000 h F 1 Gh

1000 Gh F 1 #h

1000 #h F 1 Th

*cti'e Power The roduct of 'oltage and the inhase comonent of

alternating current measured in units of watts and standard

multiles thereof, i.e.,

1000 atts F 1

1000 F 1 G

1000 G F 1 #

1000 # F 1 T

CODES & STANDARDS: KERC - 10


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*gency * term used in 'arious sections of the #rid "ode to refer to

utilities that utili?e the IntraTransmission System.

*aratus *ll e8uiment, in which electrical conductors are used,

suorted or of which they may form a art. In safety

coordination this also means %igh


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because of failure or inability of the Gain Protection to

oerate or in case of failure to oerate a circuit breaer other

than the associated circuit breaer.

Blac Start The rocedure necessary for a reco'ery from a Total Shutdown or

Partial Shutdown without the a'ailability of electricity from e9ternal

sources.

Blac Start

"aability

*n ability in resect of a Blac Start Station, for at least one

of its #enerating Units or ""#T Units to StartU from

Shutdown and to energi?e a art of the system and be

synchroni?ed to the system uon instruction from the State

oad 2isatch "entre, within two hours, without any e9ternal

suly.

Blac Start

Stations

Power Stations ha'ing Blac Start "aability.

Bul suly The sale of Electricity to any erson for resale such as,

suly gi'en to a &etail Suly icensee for uroses of

distribution and resale in his area of suly.

Bul Sulier Bul SulierJ means any erson who is authori?ed to carry

out bul ower suly.

Bul Suly

icensee

*ny ersonA"omany authori?ed by +E&" for engaging in

the business of bul suly of electricity."ati'e Power

Plant ("PP!

* Power Plant rimarily oerated to meet a cati'e demand

and also connected to the TransmissionA 2istribution

Systems. Such a lant shall hold 'alid consent under

Section 1- of the *ct and ermission for sale of surlus

ower to the TransmissionA2istribution 3 &etail Suly

icensees.

"aution $otice * notice con'eying a warning against interference.

"BIP "entral Board of Irrigation and Power.

""#T "ombined "ycle #as Turbine."E* "entral Electricity *uthority.

"entral

Transmission

*ny #o'ernment "omany notified by the "entral

#o'ernment under section )-* of the Electricity &egulatory



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Utility ("TU! "ommission *ct, 1//=.

"E&" "entral Electricity &egulatory "ommission.

"onnected

Planning 2ata

*ctual 2ata relacing estimated 'alues assumed for

lanning uroses.

"onnection The electric ower lines and electrical e8uiment used to

effect a connection of a User@s System to the Transmission

System.

"onnection

"onditions

Those conditions mentioned in Section : ("onnection

"onditionsJ! which ha'e to be fulfilled before the Users

System is connected to the #rid.

"onnection Point * #rid Suly Point or #rid Entry Point, as the case may be.

"onsumer * erson to whom electrical ower is ro'ided.

"ontingency

&eser'e

The a'ailable standby generation o'er forecast demand,

which is re8uired in the eriod from )6 hours ahead down to

real time to co'er against uncertainties in #enerating Plant

a'ailability and against errors in forecast.

"ontrol Engineer * erson identified as ha'ing resonsibility for cross

boundary safety under section 11 "ross Boundary SafetyJ

of the #rid "ode.

"ustomer

2emand "ontrol

&educing the suly of electricity to a "ustomer or

disconnecting a "ustomer in a manner agreed for

commercial uroses between a sulier and its "ustomer.2emand The demand of G and G


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(e! *utomatic low >re8uency oad 2isconnection.

(f! Emergency manual oad 2isconnection.

2esigned

Ginimum

7erating e'el

The outut (in whole G! below which a 2esatch Unit is

generally not allowed to oerate according to rudent

oerating ractice.2esatch 7erational control of an integrated electricity system

in'ol'ing oerations such as

*ssignment of le'els of outut to secific #enerating

Plant or load control de'ices to effect the most reliable

and economical suly as the loads 'ary,

The control of the oeration of e9tra high 'oltage lines,

associated substations and e8uiments, The scheduling of 'arious tyes of transactions with the

electric utilities o'er the interconnecting Transmission

ines.

2eSynchroni?e The act of taing a #enerating Unit off a system to which it

has been Synchroni?ed.

2isconnection The hysical searation of Users or "ustomers from the

System.

2iscrimination The 8uality where a relay or rotecti'e system is enabled to

ic out and cause to be disconnected only the faulty

*aratus.

2istribution

System

2istribution SystemJ means any system consisting mainly of

cables, ser'ice lines and o'erhead lines, electrical lant and

meters ha'ing design 'oltage of 55 +< and below. The

distribution system shall not include any art of a

transmission system e9cet the terminal e8uiment used for

the suly of electricity to e9tra high 'oltage (;; +< andabo'e! "onsumers.

2istribution 3

&etail Suly

*ny ersonAcomany authori?ed by +E&" for engaging in

the business of 2istribution 3 &etail Suly of Electricity.



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icensees

2rawal The imortAe9ort of Electrical Energy fromAto the grid.

Earthing "onnecting the conducting arts of an e8uiment or

machinery with the general mass of earth, in such a manner

ensuring at all times an immediate discharge of energywithout danger, by maintaining the same efficiently at earth@s

otential.

Earthing 2e'ice * means of ro'iding connection between a conductor and

earth being of ade8uate strength and caability.

Emergency

Instruction

* 2esatch instruction issued by the oad 2esatch "entre,

to a 2esatching Unit which may re8uire an action or

resonse which is outside #eneration Scheduling and

2esatch Parameters, #eneration and other rele'ant 2ataor $otice to Synchroni?e.

E9citation System The e8uiment ro'iding the field current of a machine,

including all regulating and control elements, as well as field

discharge or suression e8uiment and rotecti'e de'ices.

E9citer The Source of electrical ower ro'iding the field current of a

Synchronous Gachine.

E9ternal

interconnection

*aratus for the transmission of electricity to or from the

+arnataa #rid into or out of the Southern #rid.

>ault "urrent

Interrution Time

The time inter'al from fault incetion until the end of brea time of

the circuit breaer.

>re8uency The number of alternating current cycles er second

(e9ressed in %ert?! at which the system is oerating.

#enerating

"omany

#enerating "omanyJ means a "omany registered under

"omanys *ct, 1/:; ( 1 of 1/:;! and which has among its

obDecti'es the establishment, oeration and maintenance of

generating stations.#enerating Plant * Power Station connected to the Transmission System and

a'ailable for Scheduling by the oad 2esatch "entre.

#enerating Unit The combination of an Electric Power #enerator and its



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Prime mo'er and all of its associated e8uiment, which

together constitutes a single generating machine

#eneration

Schedule

The desatch schedule of a #enerating Station.

#eneratorcaability cur'e

* diagram, which shows the G and G


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Indian Standards

(HISH!

Those Standards and secifications aro'ed by the Bureau

of Indian Standards.

Interconnecting

Transformer(I"T!

Transformer connecting E%< lines of different 'oltage

systems.

Interface*greement

*n agreement between a User and STU containingro'isions for dealing with the conse8uences of user owning

or oerating lant or aaratus which is sited on another

users land andAor for sharing the facilities andAor the

ro'isions of ser'ices atAor near a connection site.

Intertri

*aratus

*aratus that erforms intertriing.

Intertriing (a! The triing of circuitbreaer(s! by commands initiated

from Protection at a remote location indeendent of thestate of local Protection4 or

(b! 7erational intertriing.

Isolating 2e'ice * de'ice for achie'ing Isolation.

Isolation The disconnection of %< *aratus from the remainder of

the System in which that %< *aratus is situated.KERC +arnataa Electricity &egulatory "ommission.

+P" +arnataa Power "ororation imited.

+PT" +arnataa Power Transmission "ororation imited.

+PT" Site Geans a site owned (or occuied ursuant to a lease,

licence or other agreement! by +PT" in which there is a

"onnection Point. >or the a'oidance of doubt, the ortion of

User@s site occuied by +PT" as aforesaid, is a +PT"

Site.

ean Period That eriod in a day when the electrical ower demand is

lowest.

icence *ny license granted by +E&".icence

Standards

Those standards set out or referred to in the

TransmissionABul SulyA2istribution 3 &etail Suly

icences.



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oad The *cti'e, &eacti'e or *arent Power as the conte9t

re8uires, generated, transmitted or distributed.

oad >actor oad >actor is the ratio of the a'erage ower to the

ma9imum demand. The load factor deends on the inter'al

of time of the ma9imum demand and the eriod o'er which

the a'erage is taen.

Units consumed in a gi'en eriod

oad >actor F

Ga9imum 2emand 9 $o. of hours in the

eriod

oaded Sulying electrical ower to the System.

ocal Safety

Instructions

The safety manuals and instructions framed and issued by

the User and +PT", setting down the methods and

rocedures to be adoted and recautions to be taen to

ensure comlete safety to the ersonnel carrying out the

oeration, maintenance and testing of the lant and

aaratus.

ow


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of generation, or loss of imort from an E9ternal

Interconnection, or mismatch between generation and

2emand.

7eration * scheduled or lanned action relating to the oeration of a

System.7erational 2ata 2ata re8uired under the 7erating "odes andAor Scheduling

and 2esatch "odes.

7erational

Planning

Planning carried out to achie'e, as far as ossible, the

standards of security set out in the Transmission Planning

and Security Standard through 'arious time scales, the

matching of generation outut with forecast 2emand

together with a reser'e of generation to ro'ide a margin,

taing into account outages of the following to which the

Power Stations andAor "ustomers are connected

(1! "ertain #enerating Units,

()! Parts of the Transmission System, and

(5! Parts of User Systems.

7erational

Procedures

Ganagement instructions and rocedures, both for the

Safety &ules and for the local and remote oeration of Plant

and *aratus, issued in connection with the actual

oeration of Plant andAor *aratus at or from a "onnecting

Site.

7ut of

Synchronism

The condition where a System or #enerating Unit can not

meet the re8uirements to enable it to be Synchroni?ed.

7utage * total or artial regulation in a'ailability due to reair and

maintenance of the Transmission or 2istribution or

#eneration facility or defect in *u9iliary System.

Part oad The condition of a Power Plant which is oaded but is not

running at its declared a'ailability.

Partial Shutdown * shutdown of a art of the system resulting in failure of

ower suly, either from e9ternal interconnections or from

the healthy art of the system.



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Pea Period That eriod in a day when the electrical ower demand is

highest.

Person *ny indi'idual connected with the generation, transmission,

distribution and utili?ation of electrical ower.

P#"I Power #rid "ororation of India imited.Planned 7utage *n outage of #enerating Plant or art of the Transmission

System, or art of a User@s system cocoordinated by S2".

Point of

"onnection

*n electrical oint of connection between the Transmission

System and the User@s System.

Point of Isolation The oint on *aratus at which Isolation is achie'ed.

Power >actor The ratio of *cti'e Power to *arent Power.

Power Purchase

*greement

The agreement entered into between the #enerating

"omany and the Transmission icenseeABul Suly

icenseeA2istribution 3 &etail Suly icensee.

Power Station *n installation comrising one or more #enerating Units owned

andAor controlled by the same #enerating "omany.

Protection The schemes and aaratus for detecting abnormal

conditions on a System and initiating fault clearance or

actuating signals or indications.

Protection

*aratus

* grou of one or more Protection &elays andAor logic

elements designated to erform a secified Protection

function.Prudent Utility

Practices

Those ractices, methods, techni8ues and standards, as

modified from time to time, that are generally acceted for

use in the International Electric Utility Industry, taing into

account the re'ailing conditions in India. These shall be the

ones commonly used in electrical utility for engineering and

oerations such as the design, engineering, construction,

testing, oeration and maintenance of e8uiment lawfully,

safely, efficiently and economically, as alicable to the

e8uiment of certain si?e, ser'ice and tye. These ractices,

methods, standards and acts shall be adDusted to the e9tent



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necessary in order

1.To conform to oeration and maintenance guide lines

recommended by the e8uiment manufacturers and

suliers and shall also be in accordance with the guide

lines gi'en in the rele'ant IS "ode of Practices for such

e8uiments where'er a'ailable,

). To ensure comliance with the IE *ct and &ules and

other related laws,

5. To tae into account the site location, including (without

limitation! the climatic, hydrological and other

en'ironmental or general conditions thereof,

6. To conform to energy conser'ation, and

:. To conform to #eneral Safety Standards.

&ated G The Hrating lateH G outut of a #enerating Unit, being that

outut u to which the #enerating Unit is designed to

oerate.

&eacti'e Power The roduct of 'oltage and current and the sine of the hase

angle between them measured in units of 'oltameres

reacti'e and standard multiles thereof, i.e.

1000


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testing! is to be carried out on a system, which necessitates the

alication of Safety Precautions on %< *aratus.

Safety from the

System

Those conditions which safeguard ersons carrying out the

wor on a System from the dangers, which are inherent in

the System.Safety &ules The rules framed by the Users and the Transmission

icensee to ensure safety to ersons woring on

PlantA*aratus.

Schematic

2iagrams

2iagrams which are a schematic reresentation of the %LANNING CODE

38. INTRODUCTION /

The System Planning secifies the technical and design criteria and

rocedures to be adoted by the Transmission icensee for the lanning



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and de'eloment of the Transmission System. The Users of the

Transmission System shall tae the HSystem lanningH into account for

lanning and de'eloment of their own System.

6.1.1 &einforcements and e9tensions to the System arise due to many reasons

of which a few are mentioned below

1. * de'eloment on a User@s System already connected to the

Transmission System as a User de'eloment.

). Introduction of a new connection oint between an User@s System

and the Transmission System.

5. The need to increase System caacity, remo'al of oerational

constraints, maintenance of Security Standards and meeting general

increases in 2emand.

6. Steady state and transient stability considerations.

:. "umulati'e effects of any combination of the abo'e four.

6.1.) The wor of such reinforcement and e9tension to the Transmission

System may also in'ol'e wor at a connecting oint (entry or e9it! of a

#enerating "omanyA2istribution icensee to the Transmission System.

6.1.5 The de'eloment of the Transmission System must be lanned in

ad'ance duly allowing sufficient lead time, considering the following1. Time re8uired for obtaining all the necessary statutory aro'als lie PT""

clearance, >orest clearance, &ailway clearance, clearance from a'iation

authorities, $ational highways, State highways etc., and the right of way

ermissions where'er re8uired,

). Time re8uired for detailed engineering, design and construction wor to be

carried out. This HSystem PlanningH, therefore, enforces the time scales for

e9change of information between the Transmission icensee and the

User(s!. *ll the concerned arties, where'er aroriate, shall ha'e due

regard to the confidentiality of such information.

38' O"#5t!# /



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6.).1 This Section formulates the Standards and Procedures for the HSystem

PlanningH to enable the Transmission icensee in consultation with the

Users, for e'ol'ing an efficient, coordinated, secure and economical

Transmission System for the +arnataa Power #rid in order to satisfy the

re8uirements of 2emand and #eneration.

382 >#rs?#5t!# >la( /

6.5.1 The load forecasting shall be the rimary resonsibility of 2istribution

icensee within his area of suly. The 2istribution and &etail Suly

icensees shall determine the ea load and energy forecasts of their

areas, for each category of loads for each of the succeeding 10N1: years

and submit the same annually by 51st Garch to the Transmission

icensee. These shall include the details of demand forecasts, data

methodology and assumtions on which the forecasts are based. The load

forecasts shall be made for each interconnection oint with the +arnataa

Power #rid and other Users and shall include the annual ea load and

energy roDections along with the daily load cur'es. These forecasts shall

be udated annually and also whene'er maDor changes are made in the

e9isting system. here'er these forecasts tae into consideration

demands for ower e9ceeding : G by a single consumer, the2istribution icensee shall ersonally satisfy himself regarding the

materiali?ation of such a demand.

6.5.) The Transmission icensee shall also re'iew the methodology and

assumtions used by the 2istribution icensees in maing the load

forecasts, in consultation with them. The resulting o'erall forecast will form

the basis of lanning for e9ansion of Transmission System, which will be

carried out by the Transmission icensee. To maintain the reliability of the

interconnected &egional Power Systems, all articiants must comly with

the lanning criteriaAguidelines of "E* as udated from time to time.



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6.5.5 The Transmission icensee shall be resonsible to reare and submit a

long term (ten years! lan to the +E&" for #eneration e9ansion and the

Transmission System e9ansion to meet the future demand in accordance

with Section 1;./ of the Transmission icence. The lanning shall be in

conformity with the national ersecti'e for Power #eneration and

Transmission lan reared by the "E*.

6.5.6 The Transmission icensee shall forecast the demand for ower within the

area of suly for each of the succeeding ten years and ro'ide to the

+E&" the details of demand forecasts, data, methodology and

assumtions on which the forecasts are based. These forecasts shall be

eriodically udated. * least cost generation lan for the +arnataa State

has to be reared to meet the ten years@ load demand according to the

forecast, after e9amining the economic, technical and en'ironmental

asects of all a'ailable alternati'es and taing into account the e9isting

contracted generation resources and effects of demand management.

Similarly, a long term (ten years! lan for the Transmission System

comatible with the abo'e load forecast and generation lan shall be

reared and submitted to +E&". This shall also include ro'ision for

reacti'e comensation needed for the Transmission System.6.5.: The Transmission icensee shall be resonsible for integrating the load

forecasts submitted by each of the 2istribution and &etail Suly

icensees and determining the longterm (10 years! load forecasts for the

State. >or determining the re8uirements for the entire State, an

aroriate di'ersity factor from the data a'ailable for the re'ious years

shall ha'e to be chosen. The Transmission icensee shall satisfy itself

regarding the robability of materiali?ation of bul loads of consumers with

demands abo'e : G in consultation with the 2istribution and &etail

Suly icensees concerned.

383 >la((!(* Sta()ar)s a() >ro5#)


34/294

6.6.1 The ower generation e9ansion lanning shall be carried out in

accordance with the HPower Suly Planning and Security StandardH

aro'ed by +E&" under Section 1; of the Transmission icence. The

Transmission System shall be lanned in accordance with the

HTransmission System Planning and Security StandardH aro'ed by

+E&" under Section 1;.5 of the Transmission icence.

38 >la((!(* Data R#

6.:.1 To enable the Transmission icensee to discharge its resonsibilities

under the Transmission icence by conducting System Studies and

rearation of ersecti'e lans for demand, generation and

transmission as detailed in this section, all the Users shall furnish all the

data to the Transmission icensee from time to time detailed under 2ata

&egistration Section and categori?ed as Planning 2ata (P2!, 'ide

*nne9e H*H.

6.:.) To enable the Users to "oordinate lanning, design and oeration of

their lants and systems with the Transmission System they may see

certain salient data of the Transmission System as alicable to them.

The Transmission icensee shall suly these data from time to time as

detailed under 2ata &egistration Section and categori?ed as 2etailedTransmission System 2ata 'ide *nne9e HBH.

6.; In addition to the abo'e the abo'e ro'isions, the lanning code of Indian

Electricity #rid "ode (IE#"! which call for data e9change shall also aly

to the #enerating "omanies, "PPs, IPPs, Transmission icensee,

Utilities and 2istribution and &etail Suly icensees regarding

generation A transmission of energy from Inter State Transmission

Systems.

6.- The one time data shall be submitted within ; months from the date the

#rid "ode comes into effect, by all the concerned to the Transmission



35/294

licensee. The data other than this one time data shall be made a'ailable to

the Transmission icensee on first of *ril and first of 7ctober e'ery year.



36/294

ANNE=E A

>LANNING DATA REUIREMENTS

ClaART0I 0 GENERATION

(To be furnished by the #enerating "omany to the Transmission icensee!

A0. Sta()ar) >la((!(* Data G#(#rat!o(

TERMAL

I8 GENERAL/ 0

1. Site i. >urnish location ma to scale showing roads, &ailway

lines, Transmission lines, &i'ers, and reser'oirs if any.

ii. "oal A>uel linage (lie i8uid $atural #as, $atha.

S%SA>7 etc.!

iii. >urnish information on means of coal transort from "oal

transort from "oal mines in case of ithead stations or

means of coal carriage if coal is to be brought from distance.

i'. In case of other fuels, >urnish details of sources of fuel

and their transort.

'. ater Sources (>urnish information on a'ailability of

water for oeration of the ower Station!.

'i. En'ironmental (State whether forest, lands mining

clearance areas are affected!.

). Site Ga

(To scale!

Showing area re8uired for ower station coal linage, coal

yard, water ie line, ash disosal area, colony etc.

5. *ro9imate eriod of construction.

6. #uaranteed Plant oad >actor.

:. *nnual #eneration.



37/294

II. "onnection

1. Point of connection >urnish single line diagram of the roosed connection with

the system.

). Ste u 'oltage for connection in +eed water Pums (+!

(d! I2 >ans (+!

(e! Turbines

(f! *lternators

(g! #enerating Unit Transformers (G


41/294

6. Gost robable fault clearance time for electrical faults on the user@s system.

:. >ull descrition of oerational and commercial metering schemes.

III8 S:!t5h;ar)/

1. In relation to interconnecting transformers between %igh

:. Basic Insulation e'el (+


42/294

(b! Switchgear.

(c! Transformer Bushings.

(d! Transformer windings.

I8 G#(#rat!(* U(!ts/ 0

A8 >ara#t#rs o@ G#(#rat!(* U(!ts/

1. &ated terminal 'oltage (+

). &ated G


43/294

1. Tye of E9citation

). Ga9imum >ield 'oltage

5. Ginimum >ield 'oltage

6. &ated >ield 'oltage

:. #ain >actor

;. >eed Bac Strength

-. Time constant for control amlifier

=. Time constant for E9citer

/. Time constant for >eed Bac

10. 7utut 'oltage of control amlifier

11. Ga9imum 7utut 'oltage of control amlifier

1). Ginimum 7utut 'oltage of control amlifier

15. 2etails of e9citation loo in Bloc 2iagrams showing transfer functions of indi'idual

elements using IEEE symbols along with set 'alues.

16. 2ynamic characteristics of o'er e9citation imiter

1:. 2ynamic characteristics of under e9citation imiter

$ote Using IEEE "ommittee &eort symbols the following arameters shall be

furnished 2, *, BS9, +a, +e, +f, Ta, f,


44/294

8 >la(t >#r@ora(5#/

1. 2aily 2emand Profile (ast ear! Pea and *'erage in time mared

50 minutes throughout the day.

). 2aily 2emand Profile (forecast! In time mared 50 minutesthroughout the day.

5. Units #enerated (GU!

6. Units consumed in *u9iliaries (GU!

:. Units sulied from system to *u9iliary oad

;. Seasonal #eneration

D8 O?#rat!o(al >ara#t#rs/

1. Gin. notice re8uired for synchroni?ing a #enerating Unit from 2esynchroni?ation.

). Gin. time between synchroni?ing different generating units in a Power station.5. The minimum bloc load re8uirements on synchroni?ing.

6. Time re8uired for synchroni?ing a generating unit for the following conditions

(a!%ot

(b!arm

(c!"old

:. Ga9imum generating unit loading rate for the following conditions

(a!%ot

(b!arm(c!"old

;. Ginimum load without oil suort (G!



45/294

A8'8' ;)ro#l#5tr!5 Stat!o(s/

I8 G#(#ral/

1. $ame of Power Station

). $o. and caacity of Units (G&AG22.

III8 >rot#5t!o(/



46/294

1. >ull descrition including settings for all relays and rotection systems installed on

the #enerating units, generator transformer, au9iliary transformer and electrical

motor of maDor e8uiment included, but not limited to those listed under #eneral.

). >ull descrition including settings for all relays installed on all outgoing feeders from

Power Station switchyard, tie breaers, and incoming breaers.

5. >ull descrition of intertriing of breaers at the oint or oints of "onnection with

the Transmission system.

6. Gost robable fault clearance time for electrical faults on the user@s system.

I8 S:!t5h;ar)/

1. Interconnecting Transformers

(a! &ated G



47/294

(h! 2etails of Instrument Transformers.

5. ightning *rresters, Technical Tada.

6. "ommunications 2etails of communications e8uiment installed at oints of

connections.

:. Basic Insulation le'el (+

(a! Bus bar

(b! Switchgear

(c! Transformer Bushings

(d! Transformer indings

;. #enerating Units

i. Parameters of #enerator

(a!&ated terminal 'oltage (+

(b!&ated G


48/294

(8! 7en "ircuit saturation characteristics of the generator for 'arious terminal

'oltages gi'ing the comounding current to achie'e this.

(r! #enerator "aability "ur'e

!!8 T;?# o@ Tara#t#rs o@ E45!tat!o( Co(trol s;st#

(*S *PPI"*BE T7 T%E&G* P7E& ST*TI7$S!

!8 >ara#t#rs o@ Go#r(or

(*S *PPI"*BE T7 T%E&G* P7E& ST*TI7$S!

-. 7erational arameters

(a! Ginimum notice re8uired for synchroni?ing a #enerating Unit from 2e

synchroni?ation.

(b! Ginimum time between synchroni?ing different #enerating Units in a ower

station.

(c! Ginimum bloc load re8uirements on Synchroni?ing.



49/294

A82 >la((!(* Data G#(#rat!o(

(>or submission on re8uest by Transmission icensee!

I8 For Th#ral >o:#r Stat!o(s/

A8 G#(#ral/

1. 2etailed ProDect reort.

). Status &eort

(a! and

(b! "oal

(c! ater

(d! En'ironmental clearance

(e! &ehabilitation of dislaced ersons.

5. Technoeconomic aro'al by "entral Electricity *uthority.

6. *ro'al of State #o'ernmentA#o't. of India.

:. >inancial tieu.

B8 Co((#5t!o(/

1. &eort of studies of arallel oeration with transmission system

(a! oad flow studies

(b! Stability studies

(c! Short "ircuit studies

). Proosed connection with Transmission system

(a!


50/294

II8 ;)ro#l#5tr!5 >o:#r Stat!o(s/

A8 G#(#ral/

1. 2etailed ProDect &eort

). Status &eort

(a! Toograhical sur'ey

(b! #eological Sur'ey

(c! and

(d! En'ironmental clearance

(e! &ehabilitation of dislaced ersons

5. Technoeconomic aro'al by the "entral Electricity *uthority.

6. *ro'al of State #o't.A#o't. of India.

:. >inancial Tieu.

B8 Co((#5t!o(/

1. &eorts of studies for arallel oeration with +PT" system.

(a! oad flow studies

(b! Short "ircuit studies

(c! Stability studies

). Proosed "onnection with Transmission System

(a!


51/294

B8. Sta()ar) >la((!(* Data D!str!"


52/294

of dri'e and control arrangements.6. Sensiti'ity of load to 'oltage and

fre8uency of suly:. Ga9imum harmonic content of load;. *'erage and ma9imum hase unbalance

of load-. $earest substation from which load is to

be fed=. ocation ma to scale Ga shall show the location of load with

reference to lines and substations in

the 'icinity.

I8 Loa) For#5ast Data/

1. Pea load and energy forecast for each category of loads for each of the succeeding10 years.

). 2etails of methodology and assumtions on which forecasts are based.

5. If suly is recei'ed from more than one substation, the substation wise brea u of

ea load and energy roDection for each category of loads for each of the succeeding

10 years along with estimated daily load cur'e.

6. 2etails of load : G and abo'e.

(a! $ame of rosecti'e consumer.

(b! ocation and nature of loadAcomle9.(c! Substation from which to be fed.

(d!


53/294

). Single line diagram of distribution system (showing distribution lines from oints of

connection with transmission system 55A11 +< Substation, 11A0.6 +< substation,

consumer bus if fed directly from Transmission system!

5. $umbering and nomenclature of lines and substations (Identified with feeding #rid

substations of the transmission system and concerned 55A11 +< substation of

sulier!.

6. Gonitoring of Transmission and 2istribution osses (Gethods adoted for reduction

of losses to be stated!.

B8 Co((#5t!o(/

1. Points of connection (>urnish details of e9isting arrangement of "onnection!

). 2etails of metering of oints of connection.

C8 Loa)s/

1. "onnected oad ("ategorywise! >urnish consumer details, $o. of consumers

categorywise details of loads 1 G and abo'e!

). Information on di'ersity of load and coincidence factor.

5. 2aily demand rofile (current and forecast! on each 55or new and system imro'ement schemes!

). Status &eort

(a! oad Sur'ey



54/294

(b! oad forecast for ne9t fi'e years

5. Single ine 2iagram showing roosed new lines and Substations

6. Techno Economic aro'al by "E*

II8 Co((#5t!o(/

1. Points of connection as alied for

(a! $ew

(b! Ugrading e9isting connection

). "hanges in metering at oints of connection

III8 Loa)s/

1. 2etails of loads as er the forecast in ne9t fi'e years

). 2istribution of loads 55A11 < Substation wise roDected for ne9t fi'e years

5. 2etails of maDor loads of 1 G and abo'e to be contracted for ne9t fi'e years

I


55/294



56/294

ANNE=URE B

Cla


57/294

$ote The comilation of the data is the internal matter of the Transmission icensee,

and as such the he shall mae arrangements for getting the re8uired data from different

deartments of the icensee to udate his Standard Planning 2ata in the format gi'en

below.

A8 G#(#ral/

(a! Single line diagram of the Transmission system u to 55 +< bus at grid

substation

(b! $ame of substation

(c! Power Station connected

(d! $umber and length of "ircuits

(e! Interconnecting transformers

(f! Substation bus layouts

(g! Power Transformers

(h! &eacti'e comensation e8uiment

1. The details of caacitors installed

). *dditional caacitors to be commissioned along with additional loads.

(i! ightning *rresters

(D! Bus andAor ine &eactors

B8 S


58/294

i'. Isolating switches

C8 L!(# ?ara#t#rs/ For all C!r5

(a! 2esignation of line

(b! ength of line (+G!

(c! $o. of circuits, si?e and tye of conductor, thermal rating

(d! Per "ircuit 'alues

i. 7erating 'oltage (+

ii. Positi'e hase se8uence reactance ohmsA+G

iii. Positi'e hase se8uence resistance ohmsA+G

i'. Positi'e hase se8uence sucetance mhosA+G

'. Qero hase se8uence reactance ohmsA+G

'i. Qero hase se8uence resistance ohmsA+G

'ii. Qero Phase se8uence sucetance mhosA+G

D8 Tra(s@or#r ?ara#t#rs/ For all tra(s@or#rs

(a! &ated G

(c! "urrent Transformers

(d! Potential Transformers



59/294

(e! ightning *rresters

F8 R#la;!(* a() #t#r!(*/

(a! &elay rotection installed for all transformers and >eeders along with their settings

and le'el of coordination with other users.

(b! Getering 2etails

G8 S;st# stault in critical lines, and single ole reclosing for

600 +< ines.

(c! 2ynamic stability studies

(d! Short circuit studies ( 5 Ph. and single Ph. to earth!

(e! Transmission and distribution losses in the system.

8 D#a() Data/ For all sorecast for ne9t : years

I8 R#a5t!# Co?#(sat!o( #

(a! Tye of e8uiment (fi9ed or 'ariable!

(b! "aacities andAor inducti'e rating (


60/294

1. 2etailed ProDect &eort (>or new and System Imro'ement Schemes!

). Status &eort

5. ine

(a! &oute Sur'ey

(b! >orest "learance

6. SubStations

(a! and

(b! En'ironmental "learance

(c! Technoeconomic aro'al by "E*

(d! >inancial Tieu

II8 Co((#5t!o(/

1. Single ine 2iagram showing osition of connection

). Substation layout diagram

(a! $ew

(b! *ddition and *lteration

5. &e'ised system studies with changed arameters6. Point of "onnection

(a!


61/294

SECTION0

CONNECTION CONDITIONS

8. I(tro)


62/294

:.5.1 >or e'ery connection to the Transmission System for which a connection

agreement is re8uired, the Transmission icensee shall reare a

Schedule of E8uiment, ursuant to the rele'ant "onnection *greement,

with the information sulied by the Users. This Schedule, called a HSite

&esonsibility ScheduleH shall state the following for each item of

e8uiment installed at the "onnection Site

1. 7wnershi of the PlantA*aratus.

). &esonsibility for control of PlantA*aratus.

5. &esonsibility for oeration of PlantA*aratus.

6. &esonsibility for maintenance of PlantA*aratus.

:. &esonsibility for all matters relating to safety of any erson at the

"onnected Site.

;. The management of the Site.

:.5.) Each Site &esonsibility Schedule, in addition to the abo'e, shall contain

all other information setout in the #rid "ode. *n illustrati'e HSite

&esonsibility ScheduleH is furnished in the *nne9e H"H.

:.5.5 The User owning the "onnection Site shall ro'ide reasonable access

and other re8uired facilities for other Users whose e8uiments are

installedAto be installed at the "onnection Site for installation, oerationand maintenance etc.

:.6 System Performance

:.6.1 The design and construction of all the e8uiments connected to the

Transmission System shall satisfy the rele'ant Indian Standard

Secifications. In case of e8uiment for which the Indian Standard

Secifications do not e9ist, the aroriate IE", or IEEE or other

International Standards shall aly.

:.6.) Installation of all electrical e8uiment shall comly with IE &ules.

:.6.5 >or e'ery new "onnection sought, the Transmission icensee shall

secify the "onnection Point and the suly 'oltage, along with the



63/294

metering and rotection re8uirements as secified in the HGetering and

Protection StandardH.

:.6.6 The oeration of the Transmission System shall be in accordance with the

HTransmission System 7erating StandardH. The User shall howe'er be

subDect to the grid disciline rescribed by the S2" and S&2".

:.6.: The Insulation "oordination of the Users@ e8uiment shall conform to the

alicable Indian StandardsA"ode of ractices. The ruturing caacity of

the switchgear shall not be less than that notified by the Transmission

icensee based on system studies.

:.6.; The e8uiment for data transmission and communications for all the

Power Stations e9isting at the time the #rid "ode comes into effect shall

be owned and maintained by the STU unless alternati'e arrangements are

mutually agreed to. >or new Power Stations the same shall be owned and

maintained by the STU, unless otherwise mutually agreed to by the

#enerating "omany.

8 Co((#5t!o( >o!(ts /

:.:.1 G#(#rat!(* Co?a(; /The 'oltage at the oint of connection with the

Transmission System may be 600A))0A110A;; < or as agreed with the

STU. The connection oint shall be the outgoing feeder gantry oint ofthe Power Station switchyard. The Getering Point shall be the outgoing

feeder. *ll the rotection and metering e8uiment within the erimeter of

the Power Station shall be owned and maintained by the #enerating

"omany. >rom the outgoing oint onwards, the Transmission icensee

shall maintain all the e8uiment.

:.:.)D!str!"


64/294

terminal, communication, rotection and metering e8uiment within the

remises of the Transmission icensee shall be owned and maintained

by the Transmission icensee. The resecti'e 2istribution 3 &etail

Suly icensees shall maintain all the e8uiment from the outgoing

feeder gantry onwards.

:.:.5Co((#5t!o(s :!th oth#r Tra(s!ss!o( S;st#s / 0 The connection,

metering and rotection scheme, metering oint and the 'oltage for the

Southern &egional Transmission System shall be in accordance with the

mutual agreement between the "TU and the STU. The connection for

other neighbouring state transmission systems shall also be in

accordance with the mutual agreement between the concerned state

icensees.

:.:.6C>>s a() B


65/294

*licable data along with the data listed in the *nne9e * and B of

Section 6.

"onfirmation that the rosecti'e installation comlies with the

ro'isions of IE &ules and IE *ct.

"onstruction Schedule and target comletion date.

*n undertaing to the effect that the User shall abide by the #rid "ode

and the ro'isions of IE &ules, for installation and oeration of the

*aratus.

>or secial loads lie *rc >urnaces, &olling Gills etc., &eal and &eacti'e

Power


66/294

clearances, waylea'es etc., where'er necessary. In resect of offers for

modifications to the e9isting "onnections, the terms shall also tae into

account, the e9isting "onnection *greement.

:.;.: If the nature of comle9ity of the roosed 2e'eloment is such that the

rescribed time limit for maing the offer is not considered ade8uate, the

Transmission icensee shall mae a reliminary offer within the

rescribed time limit indicating the e9tent of additional time re8uired for

more detailed analysis of the issues.

1. 7n receit of the reliminary offer, the User shall indicate romtly

whether the Transmission icensee should roceed further to mae a

final offer within the e9tended time limit.

). If necessary, the Transmission icensee may re8uire the User to

furnish some or all of the 2etailed Planning 2ata at this stage itself in

ad'ance of the normal time limit.

:.;.; *ll offers (other than the reliminary offers! including re'ised offers shall

remain 'alid for ;0 (si9ty! days from the date of issue of the offer. The

Transmission icensee shall mae a re'ised offer, uon re8uest by a

User, if necessitated by changes in data furnished earlier by the User.

:.;.- The User shall furnish the rele'ant 2etailed Planning 2ata to theTransmission icensee within thirty days of accetance of an offer or

such longer eriod as the Transmission icensee may agree in a

articular case.

:.;.= here'er the State Power #rid is connected with the Inter State

Transmission System, the ro'isions of "onnection "onditions of IE#"

will re'ail.

87 R!*ht to R##5t a( A??l!5at!o( /

:.-.1 The Transmission icensee may reDect any alication for connection to

andAor use of the Transmission system under the following conditions



67/294

1. If the roosed connections 'iolate any ro'isions under the

Transmission icense,

). If the roosed wors stated in the alication do not lie within the

ur'iew of the icence or do not conform to the ro'isions of the #rid

"ode,

5. If the alicant fails to gi'e the undertaings according to clause

:.;.1 of this section.

:.-.) In the e'ent of an offer becoming in'alid or reDected by an alicant

within the 'alidity eriod, no further action shall be taen by the icensee

on the "onnection alications unless it is substantially different from the

original alication with regard to the system changes.

81 Co((#5t!o( A*r###(ts /

:.=.1 * connection *greement, or the offer for a connection *greement, shall

include, as aroriate within its terms and conditions, the following

1. * condition re8uiring both the arties to comly with the #rid "ode.

). 2etails of connection andAor use of the system.

5. 2etails of any caital related ayments and any other ayments and

deosits etc., arising from necessary reinforcement or e9tension ofthe System.

6. * HSite &esonsibility ScheduleH detailing the di'ision of resonsibility

at the "onnection Sites in relation to ownershi, control, oeration

and maintenance of Plant and *aratus and to safety of ersons.

:.=.) If any offer was originally made uon an alication for 2e'eloment by

a User, which is subDect to changes in the design arameters, the

Transmission icensee shall mae a re'ised offer to the User including

re'ised terms and e9tended time limit for submission of data. This

re'ised offer shall form the basis of any "onnection *greement.



68/294

ANNE=E C

SITE RES>ONSIBILITY SCEDULE

$ame of the ower stationAsubstation owner

Telehone $o

>a9 $o

Permanent *ddress

Item of Plant or

*aratus

Plant

7wner

&esonsibility for &emars

Safety "ontrol 7eration Gaintenance

eeders

#enerating Units

C*ll %< *aratus on any "onnection Site shall be shown on one Schematic

diagram, which shall include details of the following

1. Busbars

). "ircuit Breaers

5. Isolator

6. Byass facilities

:. Earthing switches

;. Gaintenance earths

-. 7'erhead line entries

=. 7'erhead line tras

/. "able and "able sealing ends

10. #enerating Unit

11. #enerating Unit Transformers

1). #enerating Unit *u9iliary Transformers including ow


69/294

1:. Series or Shunt &eactors

1;. #rid Transformers (Inter "onnecting Transformers!

1-. Tertiary windings

1=. Earthing and *u9iliary Transformers

1/. Three hase 'oltage transformers

)0. Single hase 'oltage transformers and hase identity

)1. Surge *rresters

)). $eutral earthing arrangements on %< Plant

)5. "urrent transformers

CCC

SECTION06

O>ERATION >LANNING AND SECURITY

68. I(tro)


70/294

ordination with the Users, fi9ing the arameters for 7eration margin,

contingency reser'e, demand control etc., for a satisfactory grid oeration

and System Integrity.

68' O"#5t!# /

The 7bDecti'e of this Section is to define the rocess, which will allow the

Transmission icensee to minimi?e transmission outages by coordination

with the #enerating "omanies and other Users@ outages while

maintaining system security to the e9tent ossible. This section also

ro'ides guidelines for setting out reser'es a'ailable from

1. E9ternal "onnections,

). System 7eration and

5. 2emand control.

682 D#a() Est!at!o( /

;.5.1The estimation of 2emand shall be carried out both in the long time scale

to ensure systemAlant margins and ratings and in the shorter time scale

to assist in the fre8uency control according to HSchedule of 2isatchH

indicated in the HPower #eneration Ganagement and 7erating

StandardH.;.5.)The 2istribution 3 &etail Suly icensee shall formulate a longterm

demand forecast considering the re'ious financial year as base and

roDecting the 2emand for the succeeding : years. 2uring this rocess

he shall re'iew the status of loads materiali?ing as er the re'ious load

forecast. Energy sales in each Tariff "lass shall be roDected in the

forecast eriod o'er the corresonding figures relating to the base year

by adoting an aroriate statistical method. The roDections shall tae

into account the assumed normal growth for nonsecific loads, secific

and identified loads of 1 G and abo'e, and the effects of 2emand Side

Ganagement, if any, and energy conser'ation. The aggregate energy



71/294

and ea load re8uirements at each connection oint shall be estimated

taing into account the distribution losses. The 2istribution 3 &etail

Suly icensee shall forward the long term demand forecast for each

connection oint with the Transmission System for his area of suly on

annual basis to the Transmission icensee and +E&" along with the

following details on the basis of which the forecast is made

(a! 2ata,

(b! Gethodology,

(c! *ssumtions

;.5.5It shall be the resonsibility of all the 2istribution 3 &etail Suly

icensees to fully cooerate with the Transmission icensee in

rearation of demand forecasts for the entire +arnataa State.

;.5.6The 2istributionA&etail Suly icensees shall ro'ide their estimates of

2emand at each "onnection Point for the eriod from 1st Vuly to 50th

Vune by 51st Garch of each year on a year ahead basis. This shall be

udated for e'ery month subse8uently in the re'ious month on month

ahead basis, and in the re'ious day on day ahead basis as re8uired by

the Transmission icensee.

;.5.:Based on the data furnished by the 2istributionA&etail Suly icensees,the Transmission icensee shall mae monthly ea and lean eriod

demand estimates for the year ahead, daily ea and lean eriod

demand estimates for the month ahead, and hourly estimates for the day

ahead demands.

;.5.;The Transmission icensee shall use hourly generation summation figures

and "PP imortAe9ort figures to meet the 2emand estimation.

;.5.-The 2istribution 3 &etail Suly icensees shall ro'ide to the S2",

estimates of loads that may be shed, when re8uired, in discrete blocs

with details of arrangements of such load shedding.



72/294

;.5.=*ll the data shall be collected in accordance with the rocedures agreed to

between the Transmission icensee and each User.

;.5./The S2" shall maintain a database of the total demand for the State on

an hourly basis.

683 Data r#

;.6.1 The Users and the Transmission icensee shall ro'ide all the data

indicated in the *nne9ure 2 to the S2". Each #enerating "omany

shall submit to the S2" in writing during the month of Vune e'ery year,

the #eneration Planning Parameters and the erformance chart of the

#enerator to be alied from the beginning of Vuly onwards, for the

entire year. This information shall also be furnished when re8uired

initially under the PP*. The #enerator Performance chart shall be for

each secific #enerating Unit and include the details of the #enerator

Transformers and demonstrate the limitation of reacti'e caability of the

#enerating Unit at the Transmission System 'oltage of 10O abo'e

normal as and when re8uired by the S2".

68 R#l#as# o@ C!r5

;.:.1 $otwithstanding ro'ision in any aro'ed outage lan, no cross

boundary circuits or #enerating Units of a #enerating "omany shall beremo'ed from ser'ice without secific release from the S2". This

restriction shall not aly to indi'idual #enerating Units of a "PP. 7nce

an outage has commenced, and if any delay in restoration is

arehended, the S2" or the User concerned shall inform the other

arty romtly together with the re'ised estimation of restoration time.

686 Tra(s!ss!o( Ola((!(* /

;.;.1 The S2" shall roduce a yearly transmission 7utage rogram for the eriod

from 1st of Vuly to 50th of Vune. *ll the #enerating "omanies and 2istribution

3 &etail Suly icensees shall furnish, their roosed outage rograms

containing the identification of the Unit, Substation, etc., date of start of

outage and duration of outage, in writing to the S2" for the year ahead (from



73/294

1st of Vuly to 50th of Vune! by first of *ugust each year. The S&2" shall

inform its roosed outage that would affect the Transmission System to the

S2" by first $o'ember of each year. The S2" shall interact with all the

abo'e said agencies and reare an otimum draft outage lan to minimi?e

interrutions to consumers to the e9tent ossible, if necessary by rescheduling

any of the outages. The finally agreed transmission outage lan, taing into

account the regional and user re8uirements shall be reared by the S2"

and furnished to all the Users by the first of Garch e'ery year.

;.;.) The outage lan shall be re'iewed by the S2" 8uarterly in consultation with

all the concerned agencies mentioned abo'e regarding any changes

necessitated during the eriod and the re'ised outage lan shall be intimated

to all the Users. The Users re8uests for additional outages, if any, shall be

considered by the S2" and accommodated to the e9tent ossible. Such

changes shall be informed by the S2" romtly to all the concerned. The

2istribution 3 &etail Suly icensees shall also inform the consumers through

ublications in local newsaers whene'er interrutions to ower suly would

affect them.

687 O?#rat!(* Mar*!( /

;.-.1 7erating Gargin comrises of "ontingency &eser'e and 7erating

&eser'es re8uired for the satisfactory oeration of the Power System to

co'er uncertainties in Plant a'ailability, 'ariations in 2emand forecasts,

loss of E9ternal "onnections, loss of #eneration, constraints in the

Transmission System and all other factors.

;.-.) The re8uired "ontingency &eser'e shall be decided by the S2" on the

basis of historical trends in the reduction of a'ailability of the #enerating

"omanies, imorts through interstate tie lines and increases in 2emand

forecast during real time oeration.

;.-.5 hene'er the "ontingency &eser'e is to be held by a Thermal PowerStation, the S2" shall include the same in the Indicati'e &unning

notification andAor subse8uent disatch instructions by which the



74/294

#enerating "omany is notified of andAor instructed, that the #enerating

Unit shall be oerated in the "ontingency &eser'e mode.

681 D#a() Co(trol/

;.=.1 *utomatic load shedding shall be resorted to by means of the Under

>re8uency &elays as er the directions of the S2" to reser'e the

o'erall integrity of the Power System. The number and si?e of the discrete

blocs with the associated ow >re8uency setting redetermined for

*utomatic oad Shedding shall be determined on rotational basis in

consultation with the 2istribution 3 &etail Suly icensee. The fre8uency

settings of these relays shall be coordinated in consultation with the

S&EB.

;.=.) hene'er restoration of large ortions of the total demand disconnections

effected by the *utomatic load shedding is not ossible within a

reasonable time, the S2" shall imlement additional disconnections

manually, to restore an e8ui'alent amount of demand disconnected

automatically. The 2istribution 3 &etail Suly icensees shall hel the

S2" in identifying such load blocs. $o load shed by the oeration of

automatic load shedding de'ices shall be restored without secific

directions from the S2".;.=.5 Planned Ganual 2isconnection shall be imlemented by the S2" when

there is a shortfall in #eneration, or "onstraints in Transmission, or

reduction of imorts through E9ternal "onnection etc., re8uiring 2emand

"ontrol o'er rolonged eriod. In such cases a rotational load shedding

scheme shall be adoted to ensure e8uitable treatment for all "ustomers

as far as racticable.

;.=.6 Emergency Ganual 2isconnection to deal with unaccetable 'oltage and

fre8uency le'els, thermal o'er loads etc shall be imlemented by the

S2" only when loss of #eneration, mismatch of #eneration with the

demand or "onstraints in the Transmission System, result in an



75/294

emergency situation, re8uiring load shedding at short notice or no notice,

to maintain a &egulating Gargin.

68% S;st# S#5


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along with the reasons for such triing and the time re8uired for

restoration. The reort shall accomany all the rele'ant informationAdata

including the oututs of the 2isturbance &ecorder, Se8uential E'ent

&ecorder etc., re8uired for the urose of analysis.

;./.; The go'ernors of all the #enerating Units of caacity :0 G and abo'e,

e9cet run of the ri'er hydroelectric ower stations without ondage, and

steam turbines of combined cycle gas turbines, shall be in free oeration

at all times. If for any reason, the go'ernors are loced, the same should

be intimated to the S2" along with the reasons and duration of such

oeration, which has to be ratified by the &e'iew Panel subse8uently. The

oad imiter, *utomatic Turbine &unu System (*T&S!, Turbine

Suer'isory "oordinated "ontrol System etc shall not be used to

suress the normal go'ernor action in any manner. $o dead bands and

time delays shall be deliberately used.

;./.- *ll #enerating Units shall be caable of and shall not be re'ented from

icing u :O e9tra load, more than the declared Ga9imum "ontinuous

&ating, for at least fi'e minutes or within the technical limits secified by

the manufacturers, when the fre8uency falls due to a system contingency.

In case any #enerating Unit of :0 G and abo'e does not meet thisre8uirement for any eriod, the #enerating "omany should intimate the

same to the S2". The concerned constituents shall mae all efforts to

comensate this shortfall in sinning reser'e by maintaining an e9tra

sinning reser'e on their other #enerating Units run by them.

;./.= In case the fre8uency falls below 6/.: %?, all the artly loaded #enerating

Units shall ic u additional load at a faster rate, according to their

caability. The S2" in consultation with the S&2" and the 2istribution

3 &etail Suly icensees shall reare a lan for automatic load relief

during the low fre8uency conditions. In case the fre8uency rises to :0.:

%? or higher, neither any #enerating Unit which is in stand by made shall



77/294

be synchroni?ed with the #rid nor *cti'e Power generation at any

generating station increased irresecti'e of the tye and ownershi.

;././ $o #enerating "omany shall suddenly increaseAdecrease its generation

without rior intimation to the S2" e9cet during emergencies or to

re'ent an imminent danger to any costly e8uiment. Similarly no

2istribution 3 &etail Suly icensee shall cause a sudden

decreaseAincrease in its load due to imositionAlifting of ower cuts etc.,

without rior intimation and consent of the S2", articularly when the

fre8uency is less than 6/.: %? or abo'e :0.: %?.

;./.10 *ll #enerating Units shall ha'e *utomatic


78/294

;./.1) The Users shall mae all ossible efforts to ensure that the grid fre8uency

always remains within the 6/.0 :0.: %? band, the fre8uency range

within which the steam turbines conforming to the IE" secifications can

safely oerate.



79/294

ANNE=URE D

O>ERATION >LANNING DATA

A8 Ola((!(* Data/

.8 D#a() Est!at#s/

Estimated aggregate annual sales of energy in million units and ea and lean demand

in G and G


80/294

(*ffecting transmission system!

Information shall be furnished within 1st $o'ember of each year

(a! G, which will not be a'ailable as a result of outage from Imorts through e9ternal

connections.

(b! Start2ate and StartTime and eriod of outage.

Iii. "PP@s ear ahead outage rogram

Information to be furnished within 1st of *ugust of each year

(a! G which will not be a'ailable as a result of outage.

(b! Start2ate and StartTime and eriod of outage.

iii! 2istribution "omanys ear ahead outage rogram

Information shall be furnished within 1st of *ugust of each year

(a! oad in G not to be a'ailed from any connection oint.

(b! Identification of connection oint.

(c! Period of susension of drawal with Startdate and Starttime.

i'! The icensees o'erall outage rogram

Information shall be furnished before 1st Garch of each year.

(a! &eort on roosed outage rogram to the S&2" by 1st $o'ember

each year.

(b! &elease of finally agreed outage lan.

B8 G#(#rat!o( S5h#)


81/294

d! Status of #enerating Unit seed controls system #o'ernor in ser'ice (esA$o! all

#enerator units at 10.00 %rs. e'ery day.

e! Sinning &eser'e caability (G! of all #enerator units at 10.00 %rs. e'ery day.

f! Bacing down caability withAwithout 7il suort (G! all Thermal #enerator

units at 10.00 %rs. e'ery day.

g! %ydro &eser'oir le'el 3 restrictions all #enerator units at 10.00 %rs. e'ery day.

h! #enerating Units %ourly summation oututs of all #enerator units at 10.00 %rs.

e'ery day.

i! 2ay ahead hourly G entitlements from "entral Sector #eneration at 11.00 %rs.

e'ery day.

C8 Ca?a"!l!t; )ata/

(a! #enerators shall submit to the Transmission icensee u to date caability cur'es

for all #enerating Units on receit of re8uest from the Transmission icensee.

(b! "PPs shall submit to the Transmission icensee net return caability that shall be

a'ailable for e9ortAimort from Transmission system on receit of re8uest from

Transmission icensee.

D8 R#s?o(s# to Fr#


82/294

(b! "PP@s shall ro'ide hourly e9ortAimort G to the S2" on &eal Time

basis in the first wee of the succeeding month.

(c! ogged readings of #enerators to the S2" whene'er re8uired.

(d! 2etailed reort of generating Unit triing on monthly basis.

F8 Ess#(t!al a() (o(0#ss#(t!al loa) )ata/

Schedule of essential and nonessential loads on each discrete load bloc for

uroses of load shedding shall be furnished as soon as ossible after connection.

G8 >rot#5t!o( Data/

a! #eneratorsA"PP@s shall submit details of rotection re8uirement and schemes

installed by the m as er the detailed lanning data under SubStation

HProtection and GeteringH as alicable to 2etailed Planning 2ata.

b! The Transmission icensee shall submit details of rotection e8uiment and

schemes installed by them.

c! 2etailed system 2ata re8uired for relaying and metering of the Transmission

lines and SubStations in relation to connection with any User as alicable to

detailed Planning data.

8 M#t#r!(* Data /

(a! #eneratorsA"PPs shall submit details of metering e8uiment and schemes

installed by the m.

(b! 2etailed Planning 2ata under SubStation HProtection and GeteringH as

alicable to 2etailed Planning 2ata.

(c! The Transmission icensee shall submit details of metering e8uiment and

schemes installed by them.

CCC



83/294

SECTION07

SYSTEM O>ERATION METERING, >ROTECTION, DES>ATC AND

CONTROL

78. S5o?#/

-.1.1 This Section secifies the rocedure to be adoted for the scheduling

of desatch of the #enerating Units to meet the demand and drawal

allocations, the management of fre8uency and 'oltages in the E%actor of not less than 0./0 lag as re8uired in the H2istribution System

7eration and Gaintenance StandardH and furnish all the data re8uired

by the S2" to ascertain the &eacti'e Power flow to their distribution

system. The S2" may also instruct the 2istribution and &etail Suly

icensees to maintain aroriate Power >actor and tae all measures

minimi?e &eacti'e Power drawal.

78 M#t#r!(* a() >rot#5t!o(/

-.:.1 The metering and rotection to be ro'ided at the Power Stations, Sub

stations and the distribution systems shall meet the secific

re8uirements of the HGetering and Protection StandardH issued

searately. This standard also forms an integral art of this Section. *ll

users shall cooerate with the Transmission icensee to ensure correct

and aroriate settings of rotection to achie'e an effecti'e,

discriminatory remo'al of faulty e8uiment within the target clearancetime secified in this Standard. Protecti'e &elay settings shall not be

altered, or rotection byassed andAor disconnected, without

consultation and agreement of all the affected Users. In the case where

Protection is byassed andAor disconnected by agreement, then the

cause must be rectified and rotection restored to normal condition as

8uicly as ossible. If agreement has not been reached, the electrical

e8uiment shall be remo'ed from ser'ice forthwith.

786 F!r# >rot#5t!o(/

-.;.1 *ll ade8uate recaution shall be taen and rotection shall be ro'ided

against fire ha?ards to all aaratus in the System conforming to the



88/294

rele'ant Indian Standard Secifications andAor ro'isions of IE &ules

1/:; as amended from time to time and the Tariff *d'isory "ommittee

recommendations.

***

SECTION01

MONITORING OF GENERATION AND DRA9AL

18. S5o?#/

=.1.1 This Section co'ers the rocedure to be followed by the S2" for

monitoring the #enerating 7utut, *cti'e and &eacti'e reser'e caacity

re8uired for e'aluation of the erformance of Power Plant. The



89/294

monitoring of scheduled 2rawal is imortant to ensure that the

Transmission icensee contributes towards imro'ing the &egional

erformance, and obser'es #rid disciline.

18'O"#5t!#/

=.).1 The obDecti'e of this Section is to define the resonsibilities of all Users in

monitoring the erformance of their #enerating Units, and the 2istribution

3 &etail Suly icensees comliance with the scheduled 2rawal.

182Mo(!tor!(* >ro5#)or the effecti'e oeration of the Transmission System, it is imortant

that the declared a'ailability of the #enerating "omany is realistic and

the deartures are continuously fed bac to the #enerating "omany for

effecting the re8uired imro'ement. The Transmission icensee shall

continuously monitor the #enerating Unit oututs and bus 'oltages. Gore

stringent monitoring shall be erformed at any time when there are

reasons to belie'e that the #enerating "omany@s declared a'ailability

may not match with the actual a'ailability, or declared outut does not

match with the actual outut.

=.5.) The Transmission icensee shall inform the #enerating "omany, in

writing, if continual monitoring demonstrates an aarent ersistent ormaterial mismatch between the disatch instructions and the #enerating

Unit outut or breach of the H"onnection "onditionsH. This more stringent

monitoring shall be carried out by the S2", if agreement is not reached

between the concerned arties on the erformance of the #enerating

Unit. The results of stringent monitoring shall be reorted by the S2" to

the #enerating "omany. "ontinual discreancies shall be resol'ed at

aroriate le'els for imro'ing the erformance, ro'iding more realistic

declarations or correcting any breach of H"onnection "onditionsH.

=.5.5 The #enerating "omanies shall ro'ide to the S2" hourly generation

summation oututs where'er no automatic transmitting metering or



90/294

S"*2* e8uiment e9ists. *ll the "PPs (caacity abo'e : G! shall

ro'ide to the S2" hourly e9ortAimort G and G


91/294

S2" shall ee a written log of all such triings, including the reasons

for the urose of demonstrating the effect on system erformance and

identifying the need for remedial measures. The #enerating "omanies

shall submit a detailed reort of their #enerating Unit triings to the

S2" e'ery month.

186Data R#

=.;.1 The #enerating "omanies and the "PPs shall submit the following data

on monthly basis to the S2" in the first wee of e'ery succeeding

month

1. #enerating "omanies

a! %ourly #eneration and summation on real time basis,

b! ogged readings of #enerating Units as re8uired,

c! 2etailed reort of the #enerator Unit triings.

1. "PPs (abo'e : G! %ourly e9ortAimort G on real time basis.

CCC



92/294

SECTION0%

CONTINGENCY >LANNING

%8. S5o?#/

/.1.1 This Section formulates the reco'ery rocedure to be followed by all the

Users in the e'ent of failure of +arnataa Power #rid, or the Southern

#rid resulting in total or artial collase of the System causing blacouts.%8' O"#5t!#/

/.).1 The obDecti'e of this Section is to define the resonsibilities of all the

Users for achie'ing the fastest ossible reco'ery of the #rid in the e'ent

of a failure in the Transmission System, or any sudden loss of #eneration

or a blacout caused due to the failure of the Southern #rid.

/.).) The rocedure to be adoted for a fast reco'ery shall tae into account

the following

i. The essential loads to be restored immediately,

ii. The caabilities of the Power Stations,



93/294

iii. The ossible transfer of ower from the neighbouring Systems through

Inter State Transmission ines,

i'. The e9tent of immediate a'ailability of ower from the "entral Sector

Power Stations.

/.).5 The main obDecti'e is to achie'e the following

i! &estoration of the total system and associated demand in the

shortest ossible time

ii! &esynchroni?ation of arts of the system which ha'e ceased to be

in synchronism,

iii! To ensure that the communication arrangements for use in

circumstances of serious disrution to the System, are a'ailable to

enable senior management reresentati'es of the S2", the

Transmission icensee and the Users who are authori?ed to tae

decisions on behalf of the Transmission icensee or the User,

i'! To ensure that the Transmission System can oerate in the e'entthe S2" is incaacitated for any reason.

%82 Strat#*;/

/.5.1 The situation re'ailing rior to the occurrence of the contingency, e.g.

a'ailability of secific Power Stations, Transmission ines, and load

2emands will largely determine the restoration rocedure to be adoted in

the e'ent of a total blacout. The S&2" and the S2" shall coordinate

in determining the e9tent of the roblem. The S2" shall inform all the

Users of the situation and ad'ise them to follow the strategy as outlined in

this Section for restoration. The Personnel authori?ed by the Users shall



94/294

be readily a'ailable at the Users@ end for communication and accetance

of all oerational communications throughout the eriod of contingency.

The use of "ommunication channels shall be restricted to the oerational

communications only, till normalcy is restored.

%83 Total R#*!o(al Bla5koormation of discrete ower islands with one #enerating Unit feeding

some of the local loads,



95/294

ii. E9tend such islands by adding more #enerating Units and more loads

in a coordinated manner maintaining oad#eneration Balance,

iii. Synchroni?e these islands to form a larger, more stable island,

i'. here'er facilities for synchroni?ation are a'ailable, the same shall

be made use of to bring the comlete system into synchronism,

'. &egional or Interstate assistance, where'er aroriate, shall be

utili?ed in the abo'e rocess.

%8 Total Stat# Tra(s!ss!o( S;st# Bla5ko


96/294

System following total or artial blacouts. The Users shall agree to these

Blac Start rocedures and romtly inform the S2" in ad'ance

whene'er they ha'e difficulty in following the same.

/.-.5 The S2" shall be resonsible for directing the o'erall Transmission

System restoration rocess by coordination with all the Users and the

S&2".

/.-.6 The 2istribution 3 &etail Suly icensees shall be resonsible for

sectionali?ing the 2istribution System into discrete, unconnected blocs of

load. They shall ad'ise the S2" as to the 8uantum of load liely to be

iced u by the #enerator being synchroni?ed.

/.-.: The #enerating "omanies shall be resonsible for commencing their

lanned Blac Start rocedure on the instruction of the S2" and steadily

increasing their generation according to the demand intimated by the

S2".

%81 S?#5!al Co(s!)#rat!o(s/

/.=.1 2uring the rocess of restoration of the Transmission System, or &egional

System blacout conditions, the normal standards of 'oltage and

fre8uency need not be alied, and left to the discretion of the S2" asaroriate deending on the re'ailing situation.

/.=.) The 2istribution 3 &etail Suly icensees shall searately identify non

essential comonents of essential loads, which may be et off during

System "ontingencies. They shall also draw u an aroriate schedule

with corresonding load blocs in each case. The nonessential loads can

be ut on only when the System normalcy is restored, and as ad'ised by

the S2".

/.=.5 *ll Users shall ay secial attention in carrying out the rocedures to

re'ent secondary collase of the System due to haste or inaroriate

loading.



97/294

/.=.6 2esite the urgency of the situation, careful, romt and comlete logging

of all oerations and oerational messages shall be ensured by all the

Users to facilitate subse8uent in'estigation into the incident and the

efficiency of the restoration rocess. Such in'estigation shall be

conducted romtly after the incident, and laced before the #rid "ode

&e'iew Panel for araisal in its ne9t immediate meeting.

CCC



98/294

SECTION0.-

CROSS BOUNDARY SAFETY

.-8. S5o?#/

10.1.1 This Section secifies the re8uirements for safe woring ractices for

maintenance of e8uiment associated with cross boundary oerations and

lays down the rocedure to be followed when the wor is carried out on

electrical e8uiment connected to another User@s System.

.-8' O"#5t!#/

10.).1 The obDecti'e of this Section is to achie'e an agreement on the rinciles

of safety rescribed in the IE &ules when woring across a control

boundary between the Transmission icensee and the Users.

.-82Co(trol >#rso(s a() th#!r R#s?o(s!"!l!t;/

10.5.1 The Transmission icensee and all the Users shall nominate suitably

authori?ed ersons to be resonsible for the coordination of safety across

their boundary. These ersons shall be referred to as H"ontrol PersonsH.

.-83 >ro5#)


99/294

shall directly contact his counter art. "ode words shall be agreed to at

the time of wor to ensure correct identification of both the arties. "ontact

between "ontrol Persons shall normally be made by direct telehone.

10.6.6 If the wor e9tends beyond one shift, the "ontrol Person shall hand o'er

charge to the relief "ontrol Person and fully brief him on the nature of

wor and the code words in the oeration.

10.6.: The "ontrol Persons shall cooerate to establish and maintain the

recautions necessary to be taen for carrying out the re8uired wor in a

safe manner. Both the established isolation and the established earth shall

be et in the loced ositions where'er such facilities e9ist, and these

shall be clearly identified.

10.6.; The "ontrol Person in charge of the wor shall satisfy himself that all the

safety recautions to be taen are established before commencing the

wor. %e should issue the

final grid code

Documents