NOTICE DATE: March 27, 2020

NOTICE TYPE: M-A032720-01 Operations

SHORT DESCRIPTION: Proposal to Modify Wirtz Remedial Action Scheme

INTENDED AUDIENCE: ERCOT Market Participants

DAYS AFFECTED: April 6, 2020

LONG DESCRIPTION: ERCOT has received a proposal from Lower Colorado River Authority (LCRA) to modify the Wirtz Remedial Action Scheme (RAS). The Wirtz RAS is designed to prevent thermal overloads on the Wirtz to Flat Rock to Paleface 138kV transmission line (T365) during periods of high output from Ferguson Power Station combined with high wind generation in the West and Panhandle regions.

LCRA will upgrade the Wirtz to Johnson City to Mountain Top transmission line to 138kV operation in April 2020 and is proposing to modify the RAS.

The proposal to modify the Wirtz RAS is being reviewed by ERCOT. Comments on the proposal are due by April 6, 2020 and should be submitted to RAS_CMP@ercot.com using the attached comment form.  Any questions or concerns submitted by this date will be addressed by ERCOT or LCRA.

ACTION REQUIRED: Any comments to this proposal are due to ERCOT by April 6, 2020 using the attached form.

ADDITIONAL INFORMATION: Information regarding this proposal and all RASs can be found in the “Remedial Action Schemes and Constraint Management Plans” portlet located on the Long-Term Planning page of ERCOT’s Market Information System (MIS) Secure Area. A Digital Certificate is required to access the MIS Secure Area.

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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