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NOTICE DATE: January 05, 2021

NOTICE TYPE: W-B010520-01 Operations

SHORT DESCRIPTION: Update to the interface definition due to the energization of Cebolla 345 kV station for the Nelson Sharpe – Rio Hondo Generic Transmission Constraint

INTENDED AUDIENCE: ERCOT Market Participants

DAYS AFFECTED: January 07, 2021

LONG DESCRIPTION: To reflect the energization of Cebolla 345 kV station between Ajo – Rio Hondo 345 kV stations, the interface definition is modified for the Nelson Sharpe – Rio Hondo Generic Transmission Constraint (GTC).  The GTC was first established in 2015 to address instability issues in the Ajo area and was expanded in 2017 to include the Nelson Sharpe – Rio Hondo region.

The purpose of this notice is to provide contemporaneous notification to all ERCOT Market Participants of this update to the Nelson Sharpe – Rio Hondo GTC.  ERCOT will begin enforcing this change for this GTC on January 07, 2021.

Details associated with all GTCs (EMIL ID NP3-766-M, Report ID 11424) can be found on the ERCOT Market Information System (MIS) Secure Area under the Transmission page. 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 [log in to unmask].

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