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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
CODES & STANDARDS: KERC - 2 -
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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
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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.
CODES & STANDARDS: KERC - 32
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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#)
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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
CODES & STANDARDS: KERC - 34
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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.
CODES & STANDARDS: KERC - 35
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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.
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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
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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 (+
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(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
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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,
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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!
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A8'8' ;)ro#l#5tr!5 Stat!o(s/
I8 G#(#ral/
1. $ame of Power Station
). $o. and caacity of Units (G&AG22.
III8 >rot#5t!o(/
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1. >ull descrition including settings for all relays and rotection systems installed on
the #enerating units, generator transformer, au9iliary transformer and electrical
motor of maDor e8uiment included, but not limited to those listed under #eneral.
). >ull descrition including settings for all relays installed on all outgoing feeders from
Power Station switchyard, tie breaers, and incoming breaers.
5. >ull descrition of intertriing of breaers at the oint or oints of "onnection with
the Transmission system.
6. Gost robable fault clearance time for electrical faults on the user@s system.
I8 S:!t5h;ar)/
1. Interconnecting Transformers
(a! &ated G
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(h! 2etails of Instrument Transformers.
5. ightning *rresters, Technical Tada.
6. "ommunications 2etails of communications e8uiment installed at oints of
connections.
:. Basic Insulation le'el (+
(a! Bus bar
(b! Switchgear
(c! Transformer Bushings
(d! Transformer indings
;. #enerating Units
i. Parameters of #enerator
(a!&ated terminal 'oltage (+
(b!&ated G
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(8! 7en "ircuit saturation characteristics of the generator for 'arious terminal
'oltages gi'ing the comounding current to achie'e this.
(r! #enerator "aability "ur'e
!!8 T;?# o@ Tara#t#rs o@ E45!tat!o( Co(trol s;st#
(*S *PPI"*BE T7 T%E&G* P7E& ST*TI7$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.
CODES & STANDARDS: KERC - 48
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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!
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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!
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B8. Sta()ar) >la((!(* Data D!str!"
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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!
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). 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
CODES & STANDARDS: KERC - 53
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(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! $ew
(b! Ugrading e9isting connection
). "hanges in metering at oints of connection
III8 Loa)s/
1. 2etails of loads as er the forecast in ne9t fi'e years
). 2istribution of loads 55A11 < Substation wise roDected for ne9t fi'e years
5. 2etails of maDor loads of 1 G and abo'e to be contracted for ne9t fi'e years
I
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CODES & STANDARDS: KERC - 55
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ANNE=URE B
Cla
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$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
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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
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(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 (
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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!
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SECTION0
CONNECTION CONDITIONS
8. I(tro)
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:.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
CODES & STANDARDS: KERC - 62
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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!"
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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
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*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
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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
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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.
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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
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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)
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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
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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.
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;.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
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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
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#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
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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
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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
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;./.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.
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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
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(*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 $o'ember
each year.
(b! &elease of finally agreed outage lan.
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d! Status of #enerating Unit seed controls system #o'ernor in ser'ice (esA$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#
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(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
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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
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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
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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
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S"*2* e8uiment e9ists. *ll the "PPs (caacity abo'e : G! shall
ro'ide to the S2" hourly e9ortAimort G and G
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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
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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,
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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
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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,
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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
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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.
CODES & STANDARDS: KERC - 96
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/.=.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
CODES & STANDARDS: KERC - 97
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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#)
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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
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