Status of CONE, Reliability Standard, and VOLL Studies - Resource Adequacy Update
Key updates on the CONE study draft report delivery, adoption of a three-measure proposal for Reliability Standard, and progress of the VOLL survey for ERCOT Public. Details include timelines, stakeholder input, and next steps for each study.
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Presentation Transcript
Status of CONE, Reliability Standard, and VOLL Studies Pete Warnken Resource Adequacy Supply Analysis Working Group May 24, 2024
CONE Study Status Delivery of the draft study report expected by the end of May Anticipate scheduling a PUC briefing for June 2 ERCOT Public
Reliability Standard Commission Staff memo supporting the three-measure proposal https://interchange.puc.texas.gov/Documents/54584_62_1392062.PDF May 16 PUC Open Meeting: Commissioners agreed to adopt the proposal 0.1 Frequency (Expected loss-of-load event once every 10 years) 12-hour maximum duration with 1% exceedance probability Maximum magnitude determined by ERCOT analysis of the load shed that can be safely rotated during an event, along with a 0.25% exceedance probability Exceedance value to be updated on a schedule determined by the Commission Commission seeking stakeholder input on an appropriate value Initial review of the Reliability Standard starting in January 2026 (to align with market design review), and every five years thereafter Request to provide the normalized Expected Unserved Energy (EUE) as another data point (EUE divided by system load) 3 ERCOT Public
Value of Lost Load (VOLL) Study VOLL Survey closed for most customers on May 17th but will remain open for additional responses from certain large commercial & industrial customer classes until May 31st Strong response rates from residential and small/medium sized commercial customers Large industrial response rate likely to be ~30% of 100 response target; working with AEP Texas on sharing responses from their VOLL survey Next Steps: reviewing and analyzing survey data with a final VOLL Report expected by end of August 4 ERCOT Public
