Indian Electricity Grid Code

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Indian Electricity Grid Code. Contents. General Role of various organisations and their linkages Planning code for Inter State Transmission Connection Code Operating Code Scheduling and Despatch Code Miscellaneous. 1. General. IEGC. Rules Guidelines Standards. - PowerPoint PPT Presentation

Text of Indian Electricity Grid Code

  • Indian Electricity Grid Code

  • *ContentsGeneralRole of various organisations and their linkagesPlanning code for Inter State TransmissionConnection CodeOperating CodeScheduling and Despatch Code Miscellaneous

  • 1. General

  • *IntroductionTo plan, develop, operate & maintain National/Regional GridUtilitiesconnected with / usingforISTS

  • *Compliance Oversight (1.5)CERCRepeated Violation/Persistent Non ComplianceRLDCReportRPCConsensusReport issues not sortedsuo-mottoAction

  • *Compliance Oversight (1.5)CERC

    Non Compliance by NLDC, RLDC, SLDC, RPC or any other personActionReport by any person through petition

  • 2. Role of Various Organizations and their linkages NLDC, RLDC, RPC, CTU, CEA, SLDC & STU

  • *Role of NLDC (2.2)RLDCInter Regional LinksSupervisionSupervision & control RPC for regional outage PlanCoordinateCoordinateAccounting

  • *Role of RLDC (2.3)

  • *Role of RLDC (2.3) Functions optimum scheduling and despatch of electricityMonitor grid operationKeep accounts of electricity transmitted Exercise Supervision and control over the ISTS Real time operationsLicenseeGenerating companyGenerating station / Sub-stationsany other concerned person SLDCCentralStateDirectionsComply the directionsApex body for integrated operation

    For ST Open Access- Nodal AgencyRLDC

  • *Role of RPC (2.4 )Facilitate the stable and smooth operations of the system Functions:regional level operation analysisfacilitate inter-state/inter-regional transfer of powerfacilitate planning of inter-state/intrastate transmission systemcoordinate maintenance of generating unitscoordinate maintenance of transmission systemprotection studiesPlanning for maintaining proper voltagesConsensus on issues related to economy and efficiencyRPCMS SRPC shall certify Availability of transmission systemPrepare Regional Energy Account, Weekly UI, Reactive & Congestion charge account

  • *Role of CTU (2.5) to undertake transmission of electricity through ISTS to ensure development of an efficient, co-ordinated and economical ISTSCTURLDCshall operateISTS linesCTU/to provide non-discriminatory Open AccessWill not engage in trading and generationFor LTOA & MTOA nodal agencyPlanningSTUCentral Govt.State2State1State Govt.Generating CompaniesCEARPCLicensees

  • *Role of CEA (2.6)CEA(Central Electricity Authority) will formulate short-term and perspective plans for transmission systemspecify technical standards for construction of electrical plants, electric lines and connectivity to the gridspecify safety requirements for construction, operation and maintenance of electrical plants and electrical linesspecify grid standards for operation and maintenance of transmission linesspecify conditions for SEMsPromote and assist timely completion of schemesTo collect and record electrical data- cost, efficiencyTo carry out investigation ( Electrical system) Shall Prepare National Electricity Plan (NEP)

  • *Role of SLDC (2.6)SLDC Apex body in a State Optimum scheduling and despatch Monitor grid operationsKeep accounts of electricity transmittedActivities of Real-time operationexercise supervision and control RLDCDirectionsEnsure complianceDirections and exercise supervision and controlLicensee, generating company, generating station, sub-station and any other concerned person

  • *Role of STU (2.8) to undertake transmission of electricity through intra-state transmission system to ensure development of an efficient, co-ordinated and economical intra-state transmission systemSTUSLDCshall operateIntra-state transmission system STU/to provide non-discriminatory Open AccessPlanningCTUState Govt.Generating CompaniesCEARPCLicensees

  • *Role of STU (2.8)Energy transferEfficientEconomicalSTUSLDCshall operateProvide non-discriminatory open accessIntra-state transmission system CTUState GovernmentGenerartorsRPCsCEALicenceesPlanningCoordination

  • 3. Planning Code for Inter-state Transmission Introduction Objective Scope Planning Philosophy Planning Criterion Planning Data Implementation of Transmission Plan

  • *IntroductionIntra-StateInter-stateCEAIntra-StateSTUCTUTransmission schemes for planning and coordinationSTUTransmission schemes for planning and coordination

  • *Scope of planning code (3.3)ISTSSEBsSTULicenseesISGSGCIPPCTUGeneration/Transmission of energy to/from ISTSConnected to/using/developing ISTS specify principles, specify procedures specify criteriapromote coordinationinformation exchangeObjective

  • *Planning Philosophy (3.4)CTUIdentification of major inter state/regional lines including system strengthening schemesPlanning schemes shall also consider:CEAs: Long-term perspective plan Electric Power Survey of India report Transmission Planning Criteria and guidelines RPC Feedback NLDC/RLDC/SLDC feedbackCERC RegulationsRenewable capacity addition (MNRES)Annual plan (5 year forward term)

  • *Planning philosophy (contd...)System strengthening schemes by CTU:shall be done in consultation with CEAs Standing Committee for Transmission System Planning:PlanningOn the basis of PPANo PPA/ no consensus CTU may approach CERC in accordance with CERC (Grant of Regulatory approval for Capital Investment to CTU for execution of ISTS)

    Planning data:submission by STUs/Users to CTU:

  • *Planning philosophy (contd...)Voltage management by:capacitors, reactors, SVC and FACTssimilar exercise by STUSTU shall plan to evacuate power from ISTS ISTS & intra-state transmission systems are complementary & interdependentIf LTA Applications require strengthening of intra-state transmission system applicant shall coordinate with STU

  • *Planning Criterion (3.5)Planning criterion ISTSs security philosophyCEA guidelines

    a) Without load shedding or rescheduling of generation, ISTS shallwithstand and secure against the following outages:a 132 KV D/C line, a 220 KV /DC line, a 400 KV S/C line, 765 KV S/C linesingle Inter-Connecting Transformer (ICT )one pole of HVDC Bi-poleOutage of 765 kV S/C line

    Without load shedding but could be with rescheduling of generation,ISTS shall withstand and secure against the following outages:a 400 KV D/C line a 400 KV S/C line with TCSCboth pole of HVDC Bi-pole lineOutage of 765 KV S/C line with series compensation

  • *Planning Criterion (3.5)b) ISTS shall withstand the loss of most severe single system infeed without loss of stabilityc) Any one of the events defined above should not cause:loss of supplyprolonged operation of frequency below and above limitsunacceptable high or low voltagesystem instabilityunacceptable overloading of ISTS elements

  • *Planning Data & Implementationd)All S/S (132 kV & above) shall have at least two transformers

    e)CTU will carry out reactive power compensation requirement of ISTS & at ISGS switchyard

    f)SPS may be planned by NLDC/RLDC in consultation with CEA, CTU, RPC & Regional entities for enhancing transfer capability or to take care of additional contingencies

  • *Planning Data & ImplementationPlanning Data (3.6)As per CERC (Grant of Connectivity, LTA and MTOA in ISTS and related matters) Regulations 2009Implementation of Transmission Plan (3.7)Actual program of implementation of transmission lines, ICTs, reactors/capacitors and other transmission elements as per CERC (Grant of Connectivity, LTA and MTOA in ISTS and related matters) Regulations 2009

  • 4. Connection CodeMinimum technical & design criteriaOBJECTIVE Ensure the safe operation, integrity and reliability of the grid Non-discriminatoryNew/modified connection not suffer or impose unacceptable effectsIn advance knowledge about ConnectivityISTSSCOPECTUSTUUsers connected to ISTS or seeking connection to ISTSComply with CEA( Technical Standards for connectivity to the Grid) 2007

  • *Procedure for connection (4.4)User seeking new/modified connection:Shall submit an application on standard format in accordance with CERC (Grant of Connectivity, LTA and MTOA in ISTS and related matters) Regulations 2009CTU shall process as per above regulations

  • *4.5 Connection AgreementConnection agreement would be signed by the applicant in accordance with CERC (Grant of Connectivity, LTA and MTOA in ISTS and related matters) Regulations 2009

  • *Reactive Power Compensation 4.6.1

    by /STUs and Users in the low voltage systems close to the load points therby avoiding exchange of reactive power to/ from the ISTSAlready connected shall provide additional reactive compensation as per the quantum and time frame decided by the RPC in consultation with RLDC. Installation and healthiness would be monitored by RPC

  • *Data and Communication Facilities (4.6.2) reliable and efficient speech and communication system to be provided Users/STU/CTU shall provide systems to telemeter power system parametersFlowVoltageStatus of switchesStatus of transformer tapsAssociated communication system to facilitate data flow up to appropriate data collection point on CTUs system as specified by CTU in the Connection Agreement

  • * System Recording Instruments (4.6.3)Data Acquisition System/Disturbance Recorder/Event Logging facilties/Fault Locator (including time synchronization equipment ) shall be provided and always kept in working condition Responsibility for safety (4.6.4)CEA (Technical Standards for connectivity to the Grid), Regulations 2007CERC (Grant of Connectivity, LTA and MTOA in ISTS and related matters) Regulations 2009CEA (Safety Requirements for construction, operation and maintenance of electrical and electric lines) Regulations, 2008

  • *International Connections to ISTS (4.7)By CTU in consul