NOTICE DATE: June 28, 2024

NOTICE TYPE: M-A052024-03 NPRR/SCR

SHORT DESCRIPTION: Implementation Details of SCR819 and NPRR1111

INTENDED AUDIENCE: All Market Participants

DAYS AFFECTED: July 1, 2024

LONG DESCRIPTION: On May 31, 2024, system changes associated with System Change Request (SCR) 819, Improving IRR Control to Manage Generic Transmission Constraint (GTC) Stability Limits; and Protocol language associated with Nodal Protocol Revision Request (NPRR) 1111, Related to SCR819, Improving IRR Control to Manage GTC Stability Limits, were implemented.

The implementation of SCR819 began with the North Edinburg to Lobo GTC on May 31, 2024 and expanded the use to the Panhandle and South Texas Export GTC's on June 13, 2024. After monitoring, the associated logic along with IRR Base Point control is performing as expected. Therefore, on July1, ERCOT will enable the SCR819 logic for all other GTCs. Additional details regarding the SCR819 implementation plan can be found in the NTE CMWG May 2024 presentation on the May 17, 2024 CMWG meeting page.

ACTION REQUIRED: Impacted Market Participants should implement changes to their shadow systems to incorporate the system revisions made by SCR819 and Protocol language revisions made by NPRR1111.

ADDITIONAL INFORMATION: SCR819 and NPRR1111 and the associated documents can be found on the ERCOT website.

CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at ClientServices@ercot.com.

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