CRR; Operations

Mon, Feb 15, 2021 04:43 PM

W-A021521-01 New Culberson (CULBSN) Generic Transmission Constraint (GTC)

NOTICE DATE: February 15, 2021

NOTICE TYPE:  W-A021521-01 Operations

SHORT DESCRIPTION: New Culberson (CULBSN) Generic Transmission Constraint (GTC)


DAY AFFECTED: March 4, 2021

LONG DESCRIPTION: Based on the results of the Quarterly Stability Assessment (QSA) for Q1 of 2021, performed pursuant to Planning Guide Section 5.9, Quarterly Stability Assessment, ERCOT has identified the need to create a new GTC in the Culberson 138kV area. The new GTC is modeled in the Network Operations Model as CULBSN, and results from the installation of new Generation Resources in the region.

The purpose of this notice is to provide contemporaneous notification to all ERCOT Market Participants of this new CULBSN GTC. ERCOT will begin enforcing the new GTC on March 4, 2021.

Details associated with all GTCs (EMIL ID NP3-766-M, Report ID 11424) can be found on the ERCOT Market Information System (MIS) Grid Transmission page under the Generic Transmission Limits. A Digital Certificate is required to access the MIS Secure Area.

ADDITIONAL INFORMATION: Due to an outage on the e-mail list management system used by ERCOT (ListServ), ERCOT is unable to send Market Notices to publicly subscribed e-mail distribution lists.  Please forward this Market Notice to appropriate personnel in your organization to whom Market Notices would normally be distributed.

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

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