NOTICE DATE: March 29, 2024

NOTICE TYPE: M-C032924-01 Operations

SHORT DESCRIPTION: GTC Communication Documents Update - South Texas IROLs

INTENDED AUDIENCE: ERCOT-registered Transmission Service Providers (TSPs) and NERC-registered Transmission Planners (TPs), Transmission Operators (TOPs), and Transmission Owners (TOs)

DAYS AFFECTED: March 29, 2024

LONG DESCRIPTION: In accordance with North American Electric Reliability Corporation (NERC) Reliability Standard FAC-014-3 Requirement R5, Parts 5.1, 5.2, 5.5, and 5.6, which will become effective on April 1, 2024, ERCOT hereby provides notice that it has added information regarding the South Texas Interconnection Reliability Operating Limits (IROLs) to its Generic Transmission Constraint (GTC) Communication documents and posted the updated set of documents to the Market Information System (MIS) Certified Area for TSPs. The GTC Communication documents include the following information for each existing ERCOT GTC:

The value of the stability limit or IROL determined by ERCOT's offline studies;
Identification of the Facilities that are critical to the derivation of the stability limit or the IROL;
The associated IROL Tv for any IROL;
The associated critical contingency(ies);
A description of system conditions associated with the stability limit or IROL; and
The type of limitation represented by the stability limit or IROL (e.g., voltage collapse, angular stability).

ACTION REQUIRED: Access to the GTC Communication documents is restricted to users who have been assigned the ICE_M_VIEW_TSPECEII role. User Security Administrators (USAs) can begin assigning the ICE_M_VIEW_TSPECEII role to users who will require access to the GTC Communication documents.

ADDITIONAL INFORMATION: The GTC Communication documents can be found on the ERCOT MIS Secure Area for TSPs (EMIL ID: NP12-314-M, Report Type ID: 24065). To access this product, users must have the MPIM role for ICE_M_VIEW_TSPECEII installed on their Digital Certificates. The ICE_M_VIEW_TSPECEII role became available to USAs for all TSPs on March 21, 2024, at 12:15 pm.

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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