4CPNear 4CP and Pricing Event Days Mark Patterson Manager ERCOT Demand Integration Analysis performed by ERS resource type ERS Load default baseline ERS Load alternate baseline ERS Gen August 11 ID: 661897
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Emergency Response Service Analysis during
4CP/Near 4CP
and Pricing Event Days
Mark Patterson
Manager, ERCOT Demand Integration Slide2
Analysis performed by ERS resource type (ERS Load default baseline, ERS Load alternate baseline, ERS Gen)
August 11th was chosen for the 4CP day for analysis because it showed the largest MW reduction for the ERCOT system for any of the 4CP days during 2016.September 8th was chosen as the near 4CP day for analysis because it showed the largest MW reduction for the ERCOT system for any of the 14 near 4CP daysOnly ERS Loads reviewed for 4CP and near 4CPAverage SPP is the average of the four load zone prices
ERS Response During 4CP Days and near 4CP Days
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ERS Response during Pricing Event Days
Day when prices were over $200 for 4 consecutive intervalsNovember 29th was the largest price response by ESI-IDs on real-time pricing or block and index in 2016. This should provide a worst case scenario for the ERS fleet responding to prices.August 2nd was chosen because it was both a pricing event and near 4CP day
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ERS Generator Response during Pricing Event and near 4CP Day
ERS Generator fleet obligation ≈ 310 MWsERS generators that deploy only for emergencies/ERCOT instruction have a total ERS Obligation ≈ 14 MWs (not included in this analysis).ERS generators that also deploy outside of emergencies have a total ERS Obligation ≈
296 MWsNovember 29th was the largest price response by ESI-IDs on real-time pricing or block and index in 2016. This should provide a worst case scenario for the ERS fleet responding to prices.August 2nd was chosen because it was both a pricing event and near 4CP day
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Summary of Analysis
ERS Load on default baseline did not show a discernible response to pricing or 4CP/near 4CP events.ERS Load on alternate baseline did provide noticeable response during 4CP/near 4CP events but to a much lesser degree during pricing events.ERS Gen responds regularly during pricing events. 19
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