NOTICE DATE: November 19, 2021

NOTICE TYPE: M-A111921-01 NPRR

SHORT DESCRIPTION: Partial Implementation Details of NPRR1090

INTENDED AUDIENCE: Qualified Scheduling Entities

DAYS AFFECTED: November 19, 2021

LONG DESCRIPTION: On December 1, 2021, Protocol language associated with Nodal Protocol Revision Request (NPRR) 1090, ERS Winter Storm Uri Lessons Learned Changes and Other ERS Items, will be partially implemented.

Specifically, all language related to NPRR1090 will be unboxed with the exception of paragraph (3) of Section 3.14.3.3, Emergency Response Service Provision and Technical Requirements.

The following NPRR1090 changes pertaining to Emergency Response Service (ERS) will become effective December 1, 2021, including:

• Modifying and clarifying language related to the beginning and end of ERS Contract Periods for ERS renewals;
• Eliminating the options for ERS Resources to be excluded from an ERS deployment event or to exclude intervals from event and availability performance with properly noticed scheduled unavailability and planned maintenance for up to 2% of their obligated intervals without payment reductions;
• Modifying language related to short ERS Contract Period availability calculations for ERS Resources to account for short Contract Periods in which no exhaustion occurs and modifying the formula for the ratio of Availability Factor Hours to the total awarded hours in the ERS Standard Contract Term to include all awarded hours in the Standard Contract Term;
• Removing the requirement to reduce the time-weighting factor for intervals by 25% after eight hours for Qualified Scheduling Entity (QSE)-level event performance;
• Removing language related to the first full interval of an ERS deployment event from the ERS Resource-level event performance criteria and modifying language related to successful performance during ERS deployment events to satisfy annual testing requirements;
• Removing language related to testing ERS Generators for failing self-tests; and
• Modifying QSE-level event performance to be both time and capacity weighted.

The remaining Protocol language related to NPRR1090 will be implemented at a later date. This includes removing the limit on the maximum number of deployments per ERS Contract Period, the three-hour maximum limit per single deployment event, and modifying language related to the cumulative deployment obligation time requirement for Weather-Sensitive ERS Resources.

Please visit the Emergency Response Service page of the ERCOT website for documents associated with ERS.

ADDITIONAL INFORMATION: Pursuant to Nodal Protocol Section 21.6, Nodal Protocol Revision Implementation, ERCOT is required to provide notice as soon as practicable, but no later than ten days prior to implementation.

NPRR1090 and 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 [log in to unmask].

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