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PDCWG Report to ROS Chair: Chad Mulholland, NRG Vice Chair: Jimmy Jackson, CPS ROS

This report provides an overview of the PDCWG meeting, including meeting minutes and discussions on BAL-001-TRE-1 FMEs and IMFR. It also covers topics such as frequency control, ERCOT dynamic model benchmarking, RRS study, governor performance, and changes for 2020. The report includes analysis of a load shed event in Great Britain and supports various methodologies.

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PDCWG Report to ROS Chair: Chad Mulholland, NRG Vice Chair: Jimmy Jackson, CPS ROS

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  1. PDCWG Report to ROS Chair: Chad Mulholland, NRG Vice Chair: Jimmy Jackson, CPS ROS October 3rd, 2019

  2. Report Overview & Notes • Report Overview • Meeting Minutes • BAL-001-TRE-1 FMEs & IMFR • 2 FMEs in the month of August • Frequency Control Report

  3. Meeting Minutes • PDCWG Meeting 9/11/19 • ERCOT Dynamic Model Benchmarking • Annual RRS Study • Governor Performance • ERCOT Ancillary Service Analysis – Changes for 2020 • Lesson Learned Analysis • Great Britain Lighting Strike – Load Shed Event (Aug 9, 2019) • PDCWG Reviewed and Supports • SCR800 – Adding DC Tie Ramp to GTBD Calculation • Methodology to Calculate RRS Limits Procedure under NPRR 863 • Regulation & Frequency Control Reports

  4. Frequency Measurable Events Performance

  5. Frequency Measurable Events • There were 2 FMEs in August • 8/10/2019 06:49:30 • Loss of 1,081 MW • Interconnection Frequency Response: 1,502 MW/0.1 Hz • 4 of 59 Evaluated Generation Resources had less than 75% of their expected Initial Primary Frequency Response. • 4 of 59 Evaluated Generation Resources had less than 75% of their expected Sustained Primary Frequency Response. • 8/11/2019 06:18:42 • Loss of 504 MW • Interconnection Frequency Response: 1,866 MW/0.1 Hz • 10 of 58 Evaluated Generation Resources had less than 75% of their expected Initial Primary Frequency Response. • 12 of 58 Evaluated Generation Resources had less than 75% of their expected Sustained Primary Frequency Response.

  6. Interconnection Minimum Frequency Response (IMFR) Performance IMFR Performance currently 1263.43 MW/0.1Hz Frequency Response Obligation (FRO): 381 MW/0.1 Hz

  7. August 2019 Frequency Control Report

  8. CPS1 Performance

  9. RMS1 Performance of ERCOT Frequency

  10. Frequency Profile Analysis

  11. Time Error Corrections

  12. ERCOT Total Energy

  13. ERCOT Total Energy from Wind Generation

  14. ERCOT % Energy from Wind Generation

  15. ERCOT Total Energy from Solar Generation

  16. ERCOT % Energy from Solar Generation

  17. Questions?

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