ERCOT VOLTAGE PROFILE WORKING GROUP (VPWG)

May 4, 2017 Report to ROS

Recent Meeting

Reviewed progress on the current Summer-Fall Voltage Profile study. New profiles will be posted at the end of this month.

The group reviewed results of the Typical Winter test case we’ve been working on. Only 11% of units online in both cases changed voltage set points (mostly to higher values). A Minimum Load test case (25 GW ERCOT load) will be started after the current Voltage Profile study is completed.

Sharmila Gurrala of VPWG attended the NDSWG Meeting on April 18 to discuss implementation details for the NPRR776 set point and voltage at POI ICCP points.

The group discussed voltage limits at plants and the impacts this can have on meeting Protocol 3.15 Voltage Support Service obligations. It’s expected to be a topic at next month’s meeting as well.

Future Planned Meeting

Next VPWG will be held on May 9, 2017.

Scot Williams	Sharmila Gurrala

VPWG Chair	VPWG Vice-Chair