NOTICE DATE: October 4, 2024
NOTICE TYPE: M-B100424-01 Operations
SHORT DESCRIPTION: Preliminary Geomagnetically Induced Current (GIC) flow results posted
INTENDED AUDIENCE: ERCOT Resource Entities (REs) and Transmission Service Providers (TSPs) and NERC-registered Transmission Owners and Generator Owners
DAYS AFFECTED: October 18, 2024
LONG DESCRIPTION: ERCOT has posted preliminary GIC flow results for the benchmark and supplemental geomagnetic disturbance events as it works to finalize the GIC flow information required under NERC Reliability Standard TPL-007-4, Requirements R5 and R9. ERCOT requests that TSPs and REs review the posted preliminary GIC flow results and provide any applicable comments by October 18, 2024.
Pursuant to paragraph (1) of Planning Guide Section 3.1.8, Planning Geomagnetic Disturbance (GMD) Activities, the preliminary GIC flow results have been posted as a “GIC Transformer GIC Flow Information” report (EMIL ID PG3-953-M, Report ID 15633) on the Regional Planning page of the Market Information System (MIS) Secure Area. A Digital Certificate with the role ICE_M_VIEW_ECEII is required to access this ERCOT Critical Energy Infrastructure Information (ECEII) data.
Pursuant to paragraph (1)(e) of Planning Guide Section 6.11, Process for Developing Geomagnetically-Induced Current (GIC) System Models, supporting models are available to TSPs in the “GMD Planning Studies” reports (EMIL ID PG6-105-M, Report ID 14546) on the Transmission Service Provider Information page of the MIS Certified Area. A Digital Certificate with the ICE_M_VIEW_TOECEII role is required to access this Transmission Operator-only ECEII data.
In both locations, see files that include “Prelim_Transformer_GIC” in the file name.
ACTION REQUIRED: ERCOT requests that TSPs and REs review this preliminary GIC flow information and email any comments they may have to GMDVA@ercot.com with “Preliminary GIC Flow Results Comments” in the subject line by October 18, 2024.
CONTACT: If you have any questions, please contact ERCOT Grid Planning via email at GMDVA@ercot.com.
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