Date: 11-04-2013Ancillary Services andIndian Power SystemIPPAI conference on 10th& 11thApril 2013…..
Confidential Slide 2TransmissionDistributionGeneration All in one Utility Generation, Transmission andDistribution towar...
Confidential Slide 3TransmissionDistributionGenerationSystemOperationSupply Unbundled system Generation, Transmissionand...
Confidential SlideServices are transacted….. What ? Basic services Ancillary services How ? Price Market Regulation...
Confidential SlideBasic and Ancillary Services Basic Services: Generation, Transmission and Distribution towardobjective...
Confidential SlideAncillary Services Real Power Balancing Operating Reserves Scheduling and dispatch Inter-area power ...
Confidential SlideBasic and Ancillary Services which we already have7Ancillary Services :Compulsory Provision• Transmissio...
Confidential SlideScheduling, Market and Real Power Balancing1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 2...
Confidential SlideReal Power BalancingIntent of adherence to schedules for each time block is apre-requisiteAnd then the R...
Confidential SlideFrequency linked UI tariffvsAncillary Power Market Can the two co-exist ? Yes Should they co-exist ? ...
Confidential SlideReal Power Balancing Required for real power balancing, not frequency control Frequency variation is j...
Confidential SlidePOSOCO proposal Establishing Ancillary power Market is a much felt necessityBut POSOCO proposal may nee...
Confidential SlideFGMO – why have we failed ? FGMO – primary control by thermal units Secondary Control from reserve Hyd...
Confidential SlideFGMO – why have we failed ? Primary Control – FGMO ofthermal units Secondary Control fromreserve Hydro...
Confidential SlideProcurement of Ancillary Services Compulsory Provision through Rules and Regulations Voluntary Partic...
Confidential SlideTransmission Security Inter-area power flow control Re-scheduling and based on system evaluated securi...
Thank youDate: 11-04-2013
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Anciliary Services and Indian Power System

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Anciliary Services and Indian Power System

  1. 1. Date: 11-04-2013Ancillary Services andIndian Power SystemIPPAI conference on 10th& 11thApril 2013…..
  2. 2. Confidential Slide 2TransmissionDistributionGeneration All in one Utility Generation, Transmission andDistribution toward objective ofpower supply Cost (merit order), reliability,security and quality, allresponsibility of the utility andwill be as per its efficiency
  3. 3. Confidential Slide 3TransmissionDistributionGenerationSystemOperationSupply Unbundled system Generation, Transmissionand Distribution System operation andsupply functions becomevisible as distinct activity Service are transacted
  4. 4. Confidential SlideServices are transacted….. What ? Basic services Ancillary services How ? Price Market Regulations4 Unbundled system - Reliability,Security, Quality and ultimatefinal cost to consumer getdetermined from : Rules and regulations of thegame Market efficiency Behavior and efficiency of allplayers not for reliability,security, quality and cost ofsupply but towards their ownbusiness objective
  5. 5. Confidential SlideBasic and Ancillary Services Basic Services: Generation, Transmission and Distribution towardobjective of power supply as per basic servicerequirement Ancillary Services: Value added services towards supporting andimproving reliability, security and quality5
  6. 6. Confidential SlideAncillary Services Real Power Balancing Operating Reserves Scheduling and dispatch Inter-area power flow control Reactive Power - Voltage Control Economic dispatch Transmission Security System Protection Black Start6 Real Power Balancing Reactive Power Voltage Control Scheduling and Dispatch Inter-area power flow control System Protection Energy Imbalance Frequency Control Black Start Reserve Transmission Security Economic dispatch Financial Trade Enforcement Losses …. ….Indian ContextLiterature :FERC / CIGRE / Other AuthorsRefer POSOCO June 2010 paper
  7. 7. Confidential SlideBasic and Ancillary Services which we already have7Ancillary Services :Compulsory Provision• Transmission Security• Scheduling and dispatch• System Protection – SPS• Primary Frequency Response – FGMOclause 5.2 (f) of IEGC – has so farremained un-achievableVoluntary – Priced• Real Power Balancing through loosefrequency control and UI pricing• Reactive power support for voltagecontrol• Inter-area power flow - Congestionmanagement only for schedulingVoluntary cooperation – Un-priced• Black StartBasic Services:• Generation•Transmission•Distribution – Supplyutility•System Operation•Power Market•Operational coordination•Maintenance coordination•System Protection - basic•Planning coordination•Regulatory MechanismIndian Power System
  8. 8. Confidential SlideScheduling, Market and Real Power Balancing1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 243634323028262422Bilateral (Base load) contractBilateral (peak load) contractDay Ahead Hour AheadSellBuyBuySellForecasteddemandAncillaryServiceIntra DaydemandReal-timedemandBuy and Sell includes Scheduling and Re-scheduling from capacity contracts
  9. 9. Confidential SlideReal Power BalancingIntent of adherence to schedules for each time block is apre-requisiteAnd then the Real Power Balancing ancillaries to improve thatbasic level of adherence viz. FGMO – primary control by thermal units Secondary Control from reserve Hydro/Gas Units Tertiary Control by stand-by reserve unitsAll the above including FGMO could be procured as a pricedservice9
  10. 10. Confidential SlideFrequency linked UI tariffvsAncillary Power Market Can the two co-exist ? Yes Should they co-exist ? Real power getting balanced through ancillary power, there may notremain justification for frequency linked UI pricing Frequency linked UI pricing may inhibit ancillary market Can we phase out frequency linked UI in steps ?10
  11. 11. Confidential SlideReal Power Balancing Required for real power balancing, not frequency control Frequency variation is just an indicator of balancing error Also required for inter-area power flow control Inter-area power flow control more critical for system security Balancing has to come from un dispatched generation as well asload management In moving towards scheduled operation regime, balancing powerfrom generators and that from load management both must de-linkfrom frequency and priced as per time block market discoveredvalues– POSOCO proposal is only one sided11
  12. 12. Confidential SlidePOSOCO proposal Establishing Ancillary power Market is a much felt necessityBut POSOCO proposal may need some basic change Frequency triggered procurement ?? Risks: Procuring unwanted power Frequency shoot-ups Forcing utilities to pay for what they could not afford to buy May cause undesired and forced increase in UI12
  13. 13. Confidential SlideFGMO – why have we failed ? FGMO – primary control by thermal units Secondary Control from reserve Hydro/Gas Units Tertiary Control by stand-by reserve unitsUnlike the normal sequence of primary to secondary to tertiary,requirement of placing control mechanism in power system has to be theother way round.For a successful primary control, we must have secondary controlmechanism already in place and for successful secondary control we musthave tertiary control mechanism already in place13
  14. 14. Confidential SlideFGMO – why have we failed ? Primary Control – FGMO ofthermal units Secondary Control fromreserve Hydro/Gas Units Tertiary Control by stand-byreserve units14PLACINGMECHAMISMOPERATIONUCTE’s classification of frequency reservesTaken from POSOCO Approach Paper of June 2010
  15. 15. Confidential SlideProcurement of Ancillary Services Compulsory Provision through Rules and Regulations Voluntary Participation through Pricing and Market mechanism through Voluntary cooperation – un-priced15
  16. 16. Confidential SlideTransmission Security Inter-area power flow control Re-scheduling and based on system evaluated securitystatus Dynamic protection based on real time feeder loads, areaexchange deviations and frequency instead of presentschemes of only frequency based fixed feeder U/F anddf/dt load shedding16
  17. 17. Thank youDate: 11-04-2013

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