WMWG Update to WMS January 8, 2025
The update covers recent WMWG meetings, discussions on NPRRs, appointments of chair and vice-chair, and detailed analyses of NPRR1256, NPRR1190, and NPRR1229. Recommendations were made for revisions and further exploration of key topics.
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WMWG UPDATE TO WMS JANUARY 8, 2025 BLAKE HOLT, WMWG CHAIR
AGENDA G E N E R A L I T E M S N P R R S D I S C U S S E D B U T S T I L L P E R C O L AT I N G : N P R R 1 2 5 6 , S E T T L E M E N T F O R M R A O F E S R S ; N P R R 1 1 9 0 , H D L O V E R R I D E F O R I N C R E A S E D L S E C O S T S ; N P R R 1 2 2 9 , R T M C M P E N E R G Y PAY M E N T N P R R S R E A D Y F O R W M S V O T E : N P R R 1 2 4 1 , F F S S AVA I L A B I L I T Y A N D S TA N D B Y F E E C A R D / C R R B A A L L O C AT I O N D I S C U S S I O N
GENERAL ITEMS WMWG had two meetings since last WMS December 10, 2024 and January 6, 2025. Recommend Amanda Frazier, Treaty Oak Clean Energy, to serve as chair and Trevor Safko, LCRA, to serve as vice chair for 2025. In response to a previous request, ERCOT s Sam Morris shared information about how ERCOT incorporates wholesale storage load into its forecasts. There was discussion about whether after real-time co- optimization is implemented ERCOT should take charging load out of its daily forecasts.
NPRRS THAT REQUIRE MORE DISCUSSION NPRR1256, Settlement for MRA of ESRs. ERCOT s Ino Gonz lez and Kenneth Ragsdale discussed NPRR1256, which is narrowly tailored to describe how Energy Storage Resources (ESR) would be compensated when deployed as a Must Run Alternative (MRA). WMWG participants asked for more information about how ERCOT determined the capacity and duration requirements for an ESR to serve as an MRA. ERCOT explained that the capacity requirements are determined using the planning team s retirement study and are laid out in the Request for Proposal for each MRA. WMWG participants encouraged ERCOT to revise the NPRR to address the process it would use to verify that an ESR serving as an MRA has sufficient state of charge to meet its requirements as an MRA. Global mitigation concept for NPRR1190, HDL Override Provision for Increased LSE Costs. Bill Barnes discussed his idea to add a requirement that if the total settlement amount for HDL Override provisions exceeds $10m in a calendar year, that ERCOT would report to TAC the causes of the payments and make recommendations for how to reduce the instances and costs. Some expressed a desire for a hard cap rather than a reporting trigger.
NPRRS THAT REQUIRE MORE DISCUSSION (CONT.) NPRR1229, Real-Time Constraint Management Plan Cost Recovery Payment. STEC s Lucas Turner presented STEC s January 2 comments further limiting the type of payment and capping repair costs at $500k per event. STEC has worked with ERCOT to align language. There were substantive questions around which costs should be used to determine the payment. There was also interest expressed in including the payments described in NPRR 1229 in the total payments that would be captured by the global mitigation concept for NPRR1190.
NPRR1241: FFSS AVAILABILITY AND HOURLY STANDBY FEE Katie Rich presented Luminant s December 3 comments on the NPRR, which revised its clawback proposal for FFSSRs that are unavailable during portions of a Watch. ERCOT stated that it supports Luminant s December 3 comments. There was no further discussion from WMWG participants.
CARD/CRRBA ALLOCATION DISCUSSION ERCOT s Austin Rosel gave a background and overview of the CARD allocation issues, specifically explaining the new issue raised at WMS of whether the zonal allocation should be eliminated. Andrew Reimers stated that there was not a lot of support for removing the zonal component because it would have a big impact. Shams Siddiqi explained that after analyzing the impacts of removing the zonal component, he had revised Georgetown s proposal so that the zonal distribution would not change until the zone is about to reach the zone s TCOS allocation. WMWG participants discussed the various proposals and requested additional analysis from ERCOT. ERCOT will present that data either at the January 30 or March 3 WMWG meeting.
