NOTICE DATE: April 25, 2023

NOTICE TYPE: W-B042523-01 Operations

SHORT DESCRIPTION: Request for known outage(s) to address NERC Reliability Standard TPL-001

INTENDED AUDIENCE: NERC-registered Generator Owners (GOs) and Generator Operators (GOPs) and ERCOT-registered Resource Entities (REs)

DAYS AFFECTED: May 9, 2023

LONG DESCRIPTION: NERC Reliability Standard TPL-001 requires Planning Assessment studies to include “known outage(s) of generation or Transmission Facility(ies)."

To address this requirement, ERCOT requests that each NERC-registered GO and GOP and each ERCOT-registered RE identify known outage(s) of equipment (including, but not limited to, generators, transmission lines, transformers, and series or shunt devices) for study years 2025 through 2029 and provide this information to ERCOT. For each outage, each entity should include the study year that the outage is projected to be active, the projected start and stop dates and times of the outage, and the reason for the outage.

ERCOT uses this information in the creation of study models for its Planning Assessment. Please note that Requirements 2.1.4 and 2.4.4 of TPL-001-5.1 state, “Known outage(s) shall not be excluded solely based upon outage duration.” ERCOT is implementing the requirements of TPL-001-5.1 ahead of the effective date of the standard to ensure its Planning Assessment is compliant when the revised Reliability Standard becomes effective, based on guidance from Texas RE.

ACTION REQUIRED: By May 9, 2023, each NERC-registered GO and GOP and each ERCOT-registered Resource Entity shall provide a written response to this request identifying the known outage(s) of generation Facility(ies) for study years 2025 through 2029. Please send responses to ERCOT via email at [log in to unmask].

ADDITIONAL INFORMATION: Please provide requested information in the 2023RTP_GenKnownOutageTemplate attachment.

CONTACT: If you have any questions, please contact [log in to unmask].

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