Energy Storage Resource Base Point Deviation Charges Overview
Explore the concept of base point deviation charges for energy storage resources, including examples of over and under performance scenarios with settlement intervals and calculations for deviation amounts. Learn about creating new settlement models and optimizing response to grid requests.
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Presentation Transcript
KTC-7: Base Point Deviation Charges for Energy Storage Resources- Single Model Examples Magie Shanks ERCOT BESTF Meeting 11/15/2019
Overview Create a new Base Point Deviation (BPD) Settlement for the Single Model Energy Storage Resource (ESR). Over performance Providing a greater response than ERCOT has requested Over Generation or Under Consumption Under performance- Providing a lesser response than ERCOT has requested Under Generation or Over Consumption Deviation tolerance set to 3MW or 3% 2 PUBLIC
Over & Under Performance Analysis Scenarios 80.00 60.00 OVER 40.00 20.00 MW UNDER 0.00 0 1 2 3 4 OVER -20.00 UNDER -40.00 -60.00 Settlement Intervals AABP Gen/Cons 3 PUBLIC
Example Over Performance Energy Storage Resource (Over Generation) Energy Storage Resource (Under Consumption) AABP (BP + RegUp) = (30+6) 36MW AABP (BP - RegDn) = (-12 - 2) -14MW TGC (Telemetered Gen or Cons) 60MW TGC (Telemetered Gen or Cons) -4MW Tolerance: Max(MW, %): Tolerance: Max(MW, %): MW Limit (AABP + 3MW) 39MW MW Limit (AABP + 3MW) -11MW % Limit (AABP + Abs(AABP * .03)) 37.08MW % Limit (AABP + Abs(AABP * .03)) -13.8MW 21MW or 5.25MWh 7MW or 1.75MWh Deviation (TGC - Tolerance) Deviation (TGC - Tolerance) RTSPP $20/MWh RTSPP $20/MWh BPDAMT (RTSPP * Deviation) $105 BPDAMT (RTSPP * Deviation) $35 AABP = Adjusted Aggregated Base Point RTSPP = Real-Time Settlement Point Price BPDAMT = Base Point Deviation Amount 4 PUBLIC
Example Under Performance Energy Storage Resource (Under Generation) Energy Storage Resource (Over Consumption) AABP (BP + RegUp) = (15+3) 18MW AABP (BP - RegDn) = (-19 - 1) -20MW TGC (Telemetered Gen or Cons) 6MW TGC (Telemetered Gen or Cons) -36MW Tolerance: Min(MW, %): Tolerance: Min(MW, %): MW Limit (AABP - 3MW) 15MW MW Limit (AABP - 3MW) -23MW % Limit (AABP - Abs(AABP * .03)) 17.46MW % Limit (AABP - Abs(AABP * .03)) -20.6MW 9MW or 2.25MWh 13MW or 3.25MWh Deviation (Tolerance-TGC) Deviation (Tolerance-TGC) RTSPP $20/MWh RTSPP $20/MWh BPDAMT (RTSPP * Deviation) $45 BPDAMT (RTSPP * Deviation) $65 AABP = Adjusted Aggregated Base Point RTSPP = Real-Time Settlement Point Price BPDAMT = Base Point Deviation Amount 5 PUBLIC
Questions? 6 PUBLIC
Appendix BPD Settlement ESR BPD will mimic Generation Resource BPD Over Performance: BPDAMT = Max (PR1, RTSPP) * OPESR Where: OPESR = Max [0, (TGC * Max (AABP + Abs(AABP * 3%), AABP + 3MW))] AABP = Adjusted Aggregated Base Point RTSPP = Real-Time Settlement Point Price BPDAMT = Base Point Deviation Amount OPESR = Over Performance for ESR PR1 = $20/MWh; parameter defined in Protocols TGC = Telemetered Gen or Cons 7 PUBLIC
Appendix BPD Settlement (cont.) Under Performance: BPDAMT = (-1) * Min (PR2, RTSPP) * UPESR Where: UPESR = Max [0, ( * Max (AABP - Abs(AABP * 3%), AABP - 3MW)- TGC)] AABP = Adjusted Aggregated Base Point RTSPP = Real-Time Settlement Point Price BPDAMT = Base Point Deviation Amount UPESR = Under Performance for ESR PR2 = -$20/MWh; parameter defined in Protocols TGC = Telemetered Gen or Cons 8 PUBLIC
