NOTICE DATE: December 19, 2018
NOTICE TYPE: W-A121918-01 Operations
SHORT DESCRIPTION: 2019 Minimum Monthly Ancillary Service Requirements
INTENDED AUDIENCE: Qualified Scheduling Entities, Resource Entities, and Load Serving Entities
DAY AFFECTED: January 1, 2019
LONG DESCRIPTION: ERCOT Protocol Section 3.16 requires ERCOT to annually determine the methodology for determining the quantity requirements for each Ancillary Service needed for reliability, the methodology
of which must be reviewed and approved by the ERCOT Board of Directors (Board). On December 11, 2018, the ERCOT Board of Directors approved the 2019 ERCOT Methodologies for Determining Ancillary Service Requirements (2019 AS Methodology). The approved changes
affect the methodology for determining Non-Spinning Reserve Service. The 2019 AS Methodology will become effective on January 1, 2019. Please see ERCOT’s
December 11, 2018 presentation to the ERCOT Board for
additional details regarding these changes.
Per the 2019 AS Methodology, the minimum monthly Ancillary Service quantities have been posted in the
Ancillary Service Requirement Methodology (EMIL ID NP3-783-M, Report ID 13036) on ERCOT’s Market Information System (MIS). The posted quantities only reflect minimum requirements. ERCOT will provide the market with follow-up notice if any upward adjustments
to these minimum quantities are made.
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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