ERCOT Updates and Discussions on WMS Assignments and Communication Procedures

WMWG UPDATE TO WMS DECEMBER 4, 2024

AGENDA GENERAL ITEMS DAM COMMUNICATIONS UPDATE OPEN WMS ASSIGNED ACTION ITEMS NPRR1229: RTM CMP ENERGY PAYMENT CARD ALLOCATION DISCUSSION

GENERAL ITEMS ERCOT s Austin Rosel gave some background information on the EPS meter issue that was mentioned at the November 6 WMS meeting. He explained that because of a rare situation where an existing generator was transitioning to a Settlement Only Generator which didn t need to have an EPS meter in the common information model, there were some miscommunications that resulted in the meters being removed also from the settlement system, where they were still needed. The issue resulted in the need for resettlement. ERCOT has implemented additional checks and is in the process of a systems integration that will automate some of these processes to avoid human error going forward. Consultant Eric Goff asked stakeholders for feedback on his idea for drafting a large load report. The report would focus on aggregating information for a minimum of 3 sites to protect against disclosure of confidential information. Feedback was generally positive. CPS Energy s David Detelich asked for an update on how WSL load is treated in the mid-term load forecast. ERCOT will share information on this issue with WMWG at its December meeting.

DAM COMMUNICATIONS UPDATE ERCOT s Curry Holden presented an update on ERCOT s DAM Communications desk procedure. The changes are in response to lessons learned from the October 22, 2023 incident where there was an extended DAM timeline on a weekend. ERCOT determined that it needs to communicate more frequently and clearly should similar situations recur. Its new procedure will be to provide notices as soon as an incident is discovered, at least hourly, until resolution. ERCOT will title these notices DAM Notice: so that market participants can identify and prioritize these updates. DAM Status Update, DAM Close Postponement, AS Insufficiency, DAM Solution Postponement, and DAM Abort notice templates will all use the new styling. ERCOT intends to implement these changes by December 4, 2024.

WMS-ASSIGNED OPEN ACTION ITEMS WMWG discussed the aging open TAC and WMS assignments to the working group. Most of the issues are within the core competencies of WMWG, but do not have specific tasks associated with them. Specifically, for the Parking Lot Items, most of the issues that do not have resolutions are issues that at some point had a specific advocate, but the goal of the assignment has been lost over time. WMWG recommends that for any Parking Lot Item, WMS nominate a champion who can work with WMWG leadership and ERCOT to develop an action plan and facilitate discussion around the topic. WMWG recommends that any Parking Lot Items without a champion be removed from the list and considered resolved.

NPRR1229: RTM CMP ENERGY PAYMENT STEC s Lucas Turner laid out STEC s November 4 comments, which STEC developed after considering feedback from ERCOT and WMWG. The comments reduce the proposed maximum days, insert a cost cap or $500,000 and replace RTM opportunity cost recovery with recovery of the variable components of DAM Obligations. They also disqualify Resources who agree to the CMP from recovering funds. ERCOT s Austin Rosel agreed that the comments resolved many of ERCOT s concerns, although language changes were still needed to make the language agree with the spirit of the compromise. Consultant Eric Goff commented that it would be helpful to understand the resolution of NPRR1190, because it might be possible to include the payments created in NPRR 1229 in a broader cap on extraordinary payments. WMWG will discuss the NPRR1229 and the potential tie-in with NPRR 1190 at its next meeting.

CARD ALLOCATION DISCUSSION Stakeholders discussed the CARD allocation proposals to support a WMS recommendation at today s meeting. ERCOT s Austin Rosel stated that the City of Georgetown proposal makes ERCOT uneasy because the disconnection between TCOS charges and CARD revenues may lead to unintended consequences. Consultant Shams Siddiqi argued that the City of Georgetown proposal was the only proposal that addressed the lopsided incentives during the 4 summer months. He also stated that City of Georgetown has added a second component of its proposal, which is to allocate CARD amounts on a system-wide basis rather than on a Zonal basis. Some stakeholders agreed with the system-wide distribution proposal, but did not agree with the 4CP allocation methodology. There was support voiced for the Vistra proposal and support for allocating CARD in a way that mirrors CRR time-based intervals. However, there was no consensus on a single proposal.

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