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The PDCWG has not met since the last ROS meeting. Attached is

The PDCWG has not met since the last ROS meeting. Attached is ERCOT CPS1 data for August by market interval and by day of month. ERCOT instantaneous peak load for each day is overlaid on the “by Day” graph. Some correlation between load and the CPS1 score can be seen. The "by

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The PDCWG has not met since the last ROS meeting. Attached is

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  1. The PDCWG has not met since the last ROS meeting. Attached is ERCOT CPS1 data for August by market interval and by day of month. ERCOT instantaneous peak load for each day is overlaid on the “by Day” graph. Some correlation between load and the CPS1 score can be seen. The "by Interval" graph indicates low CPS1 scores on intervals 00:15, 06:15, 08:15, 09:15, 10:15, 11:15 and 22:15. Also included in the report is a slide of the August 28 loss of load weather event. A large block of load was lost in north Texas causing frequency to spike "up". ERCOT Frequency response from turbines averaged 300 MWs/0.1 Hz on this event. This is considerably below the 420 MW/0.1 Hz minimum performance level. Sydney L. Niemeyer PDCWG Chair 713-207-5051

  2. ERCOT CPS1 August 139.60

  3. ERCOT CPS1 August by Day 139.60 Month CPS1 Unit trip 2 large unit trips

  4. Aug 28 Weather event

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