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Published byMelanie Merilyn Lamb Modified over 9 years ago
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Demand Response Products
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Discussion Points 1.Setting the scene….. 2.Virtual Power Station 3.Reserves deployment order 4.Demand Response Products
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Setting the scene….. “SUPPLY” is what Eskom can deliver and “DEMAND” is what the consumer needs ENERGY MARKET is the day-head scheduling of “Supply” options to MEET the expected “DEMAND” =
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Setting the scene….. RESERVE MARKET is on the day “back-up” to ensure stability of the Eskom system/grid = SUPPLY side “RESERVES” DEMAND side “RESERVES” – Demand Response Program
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DEMAND RESPONSE PRODUCTS Demand Response Programmes Supplemental DR Instantaneous DR Self Generation DR Normal DR Emergency DR Fixed Time DR
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Virtual Power Station (VPS) KZN WC CENTRAL EC V P S SYSTEM OPERATOR SUPPLYDEMAND CCC CCC CC C CCC x x √ √ 09 00 10 00 14 00 15 00
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7 Illustration of typical RESERVE deployment order Emergency RESERVE MARKET Emergency reduction NRS 048-9 Increasing “Tightness” of Supply Stage 4 Load shedding and curtailment ( Stages 1& 2 ) Curtailment ( Stage 0 ) Load shedding and curtailment ( Stage 3 ) Supplemental DR Operating Automatic Gen Control (AGC) Instantaneous DR Instantaneous ENERGY MARKET Interruptible Load Agreements Max cont. rating/Emergency Level 1 Self Generation DR (Hi Rate) Self Generation DR (Low to Medium Rate) Open Cycle Gas Turbines
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Normal DR
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Demand Response Products Supplemental DR Supplemental Reserves > 1 MW load ( Minimum 10% of average MW demand between 5h00- 22h00 during weekdays) Minimum 30 minute notification Pre-recorded phone call 30 minute integration metering (MV 90 or pre-approved Meter on Line) 1 x 2 hour event per day 150 on target events per year Reduction measured against average of previous 3 similar days (CBL) Performance linked Capacity Payment for Standby R26.70/11.21 MW / hr Performance linked Energy Payment for load reduction at R1250/ MWh
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10 DR - Bidding and Scheduling Customer bid load availability by 9h00 day N-1 VPS consolidate and offer load to System Operator System Operator instruct VPS to schedule or not schedule loads VPS informs Customer by 15h00 of standby instruction
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Load Reduction and Rates (LR)= sum [(CBL (n) – Actual Load (n)).CBL (m) – Actual Load (m))] n = first Integration Period of the Load Reduction request m = last Integration Period of the Load Reduction request Capacity payment Peak R26,70/MW (May-Aug between 6h00-09h00 & 17h00-20h00) (Sept-April between 9h00-12h00 & 18h00-21h00) Off-peak R11,21/MW (Including Week-ends, public holidays) Energy Payment –R1250/MWh CBL is a daily profile representing the amount of electricity the CUSTOMER would have consumed in each Integration Period for Week Days and Week- end Days Minimum 30 minute notification
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Event Performance Report Notification Event duration
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Customer Base Line calculation (CBL) 13
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Monthly Performance Report Median Monthly performance Total monthly energy
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Settlement Report
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Emergency and Fixed Time DR
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Demand Response Products (continued) Emergency DRFixed Time DR Emergency ReservesOperational Reserves When needed during emergenciesOnly for three Winter months On the day or day ahead e-mail notification Daily SMS reminder notification 30 minute integration metering Number of events, participant’s availability dependent One Event per day Reduction measured against average of previous 3 similar days (CBL) Reduction measured against previous winter weekdays profile Performance measurement over 30 min Performance linked Energy Payment for load reduction at R1250/ MWh
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SELF GENERATION DR
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Demand Response Products (continue) Self Generation DR Emergency Reserves 30 minute notification Pre-recorded phone call 30 minute integration metering 1 x 2 hour Event per day (may contract up to 4 or 6 or 16 hours per day) 100 Events per year Generation measured against average of previous 3 similar days (CBL) Ref. point for scaling = 60 minutes before notification Performance measurement over 30 min Performance linked Capacity Payment for standby at: Capacity payment = R18, 75 per MW per hour scheduled Energy Payment for self-generation up to R3000 / MWh
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Self Generation
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Event Performance Report Notification Event duration
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Customer Base Line calculation (CBL) 22
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Monthly Performance Report Median Monthly performance Total monthly energy
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Settlement Report
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DR General Performance needs to be >90% of Scheduled Capacity Reports generated by the Virtual Power Station Event Performance Monthly Performance Settlement/invoice Settlement report to Customer by 10 th work day Invoiced by customer by 15 th work day (Original invoice ) Electronic payment by last business day
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Thank you Contact details: Ferdi Becker 012 421 3396 083 450 3660 beckerf@eskom.co.za
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