Latest Updates on CONE, Reliability Standard, and VOLL Studies - June 26, 2024

Updates include the status of the CONE study report filed with PUCT, approval of the Reliability Standard proposal, and ongoing work on the Value of Lost Load study. The CONE study feedback and technology selection discussions were highlighted, along with the availability of certain SERVM model data files for stakeholders. Stay tuned for more developments.

• Updates
• CONE Study
• Reliability Standard
• VOLL Study
• Energy Analysis

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1. Status of CONE, Reliability Standard, and VOLL Studies Pete Warnken Resource Adequacy Supply Analysis Working Group June 26, 2024

2. CONE Study Status CONE study status report filed with the PUCT on June 6, 2024 https://interchange.puc.texas.gov/Documents/54584_64_1 400659.PDF Discussion on the CONE study provided during the June 13 PUCT Open Meeting; requested feedback on the dispatchable reference technology selection (GE LM6000PC) and cadence for future CONE study updates Final report and CONE model completed Completing briefings with the Commission on the Study this week The PUCT report filing and ercot.com posting date (report and model) will be determined after the briefings 2 ERCOT Public

3. Reliability Standard Reliability Standard Proposal for Publication approved at the June 13th PUCT Open Meeting, available at: https://interchange.puc.texas.gov/search/documents/?controlNumber=545 84&itemNumber=67 Comment deadline is July 15, 2024 Some stakeholders have requested certain SERVM model data files for the Phase 4 Monte Carlo simulations; for more information, see ERCOT s Market Notice, available at: https://www.ercot.com/services/comm/mkt_notices/W-B062024-01 Link located at the bottom of the Resource Adequacy webpage (Account creation is needed to download the files) 3 ERCOT Public

4. Value of Lost Load (VOLL) Study VOLL Survey closed in May Brattle project team conducting survey data checks and developing VOLL estimation models Preliminary VOLL value based on survey data is expected in mid to late July 4 ERCOT Public