FYI

 

 

 

 

NOTICE DATE: October 18, 2019

NOTICE TYPE: M-A100419-02  Operations

SHORT DESCRIPTION: Implementation Details of PGRR070 - Preliminary Geomagnetically-Induced Current (GIC) flow results posted

INTENDED AUDIENCE: Resource Entities and Transmission Service Providers (TSPs)

DAY AFFECTED: November 1, 2019

LONG DESCRIPTION: ERCOT has posted preliminary GIC flow results for the supplemental GMD event in preparation to meet NERC Reliability Standard TPL-007-3, Requirement R9.  In addition, ERCOT has posted a preliminary update to the GIC flow results for the benchmark GMD event, which were previously posted on October 29, 2018 in connection with NERC Reliability Standard TPL-007-1, Requirement R5.  ERCOT requests that TSPs and Resource Entities provide comments on the posted GIC flow results by November 1, 2019.

The preliminary GIC flow results have been posted as a “GIC Transformer GIC Flow Information” report (EMIL ID PG3-953-M, Report ID 15633) in the “Regional Transmission Planning (5 year Transmission Plan)” portlet on the Regional Planning page of the Market Information System (MIS) Secure Area.

Pursuant to paragraph (1)(d) 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) in the “Models” portlet on the Transmission Service Provider Information page of the MIS Certified Area. 

In both locations, see file names that include the title “Prelim_Transformer_GIC”.

ACTION REQUIRED: ERCOT requests that TSPs and Resource Entities provide their comments on this preliminary GIC flow information via e-mail to [log in to unmask] with “Preliminary GIC Flow Results Comments” in the subject line by November 1, 2019.

ADDITIONAL INFORMATION: On October 18, 2019, ERCOT partially implemented Planning Guide Revision Request (PGRR) 070, Revised Responsibilities for Performing Geomagnetic Disturbance (GMD) Vulnerability Assessments as described in this previous Market Notice.

In addition to TSPs and Resource Entities, this notice is also issued to compliance contacts for all Transmission Owners and Generator Owners registered with NERC.

PGRR070 and associated documents can be found on the ERCOT website.

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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