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Update on NPRR 588 Solar Forecasting and Upcoming ETWG Meeting Details

This update provides key insights into NPRR 588 concerning solar forecasting, highlighting the necessary protocol revisions, and the timeline for the upcoming RFP process. The ERCOT engagements include various comments and approvals leading to a structured procedure for Short-Term Photovoltaic Power Forecasting. It outlines the proposed release of the RFP, with a workshop planned to discuss PV forecasting best practices. The next ETWG meeting is scheduled for March 24, 2014, to further deliberate on NPRR issues and additional topics.

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Update on NPRR 588 Solar Forecasting and Upcoming ETWG Meeting Details

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  1. Emerging Technologies Working GroupUpdate to WMS Contents Update on NPRR 588 Solar Forecasting: Protocol Revisions Needed Solar Forecasting: RFP Process and Timeline Next ETWG Meeting March 05, 2014

  2. I. Update on NPRR 588 • On 12/17/13, NPRR588 was posted. • On 1/15/14, ERCOT comments were posted. • On 1/16/14, PRS considered NPRR588. • On 2/3/14, a second set of ERCOT comments were posted. • On 2/6/14, WMS comments were posted. • On 2/13/14, PRS again considered NPNRR588. • February 13th PRS Meeting • Agenda: http://www.ercot.com/calendar/2014/02/20140213-PRS • On 2/13/14, PRS voted to recommend approval of NPRR588 as amended by the 2/6/14 WMS comments. There was one abstention from the Consumer Market Segment. All Market Segments were present for the vote.

  3. II. Solar Forecasting: Protocol Revisions Needed • Short-Term Photovoltaic Power Forecast (STPPF) • PhotoVoltaic Generation Resource Production Potential (PVGRPP) • SECTION 3.13 Renewable Production Potential Forecasts • 4.2.3 PV-Powered Generation Resource Production Potential • (1) ERCOT shall produce and update hourly a Short-Term Photovoltaic Power Forecast (STPPF) that provides a rolling 48-hour hourly forecast of solar production potential for each PhotoVoltaic Generation Resource (PVGR). • 5.7.4 RUC Make-Whole Charges • 5.7.4.1.1 Capacity Shortfall Ratio Share • 6.3.1 Activities for the Adjustment Period

  4. III. Solar Forecasting: RFP Process and Timeline • ERCOT Staff are proposing possibly releasing the RFP by this summer • Prior to the release of the RFP, ERCOT staff has requested that the ETWG arrange a Workshop on PV Forecasting • To cover best practices • Cal-ISO experiences • Etc • The RFP Scope of Work, Technical Requirements , etc will be topics on Spring ETWG Agendas

  5. IV. Next ETWG Meeting March 24 • Discussion and consideration of PV forecasting NPRR issues • (possible) Presentation on existing treatment of PV assets by Resource owners • Other items, TBD

  6. APPENDICES

  7. Requested WMS Motion • n/a

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