Responsibility Matrix for Policy Review and GMD Impact Assessment

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This document outlines the responsibilities of the PGDTF Transition PLWG, focusing on policy review, GMD impact assessment, and coordination with ERCOT. It includes tasks completed, ongoing tasks, and future goals related to critical infrastructure protection. The responsibilities cover updating guidelines, reviewing policy changes, and ensuring system resilience to geomagnetic disturbances. The PLWG and RPG work together to refine processes, assess impacts, and collaborate with industry stakeholders to enhance grid security.

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PGDTF Transition PLWG 03/15/2022 JORGE CANAMAR (CHAIR) JIANHUI ZHANG (VICE CHAIR)

Responsibility Matrix Item # Scope item Status Working Group Comments Will fall under PLWGs normal responsibilities of reviewing policy changes for impact to binding documents Review and comment any proposed changes to binding documents Completed & Ongoing Task 1 PLWG Update individual and joint responsibilities 2 Completed N/A Frequency of updates has been decided. To be done every 5 years, next model build needs to be ready by 06/2024 Only keep restricted access listserv and delete the public one Update GIC System models and establish frequency of updates Completed & Ongoing Task 3 SSWG Communication via listserv and maintenance of the same Completed & Ongoing Task 4 SSWG 5 Identify data and tools to perform GMDVA Completed N/A Develop acceptable Steady State Voltage Performance Critiera for GMDVA 6 Completed N/A PLWG: Review/update processes, guidelines and criteria RPG: Review GMDVA initial scope and results Completed & Ongoing Task 7 Support the GMDVA PLWG and RPG Develop/update guidelines and policies around CAPs if required as a result of a GMDVA All the data required for existing facilities has already been gathered by each TSP for the last GMDVA SCR 818, if approved, would lighten the burden of submitting any new data Completed & Ongoing Task 8 PLWG There has not been a need for CAPs so far

Responsibility Matrix Item # Scope item Status Working Group Comments Language in PG 3.1.8(6) covers this There has not been a need for CAPs so far Method developed by ERCOT will continue to be used as the standard SSWG: Procedure Manual ERCOT: Modeling Expectations N/A: Methodology for Assessing GMD Impacts - This documet will become a whitepaper available to all market participants Refine a process for approving CAPs developed as a result of a GMDVA 9 Completed RPG Review and provide feedback on method for collecting and aggregating data 10 Completed N/A Review and update PGDTF Procedure Manual, GIC Modeling Expectations, and Methodology for Assessing GMD Impacts on ERCOT System as needed Completed & Ongoing Task SSWG and ERCOT 11 Review and provide feedback on process to obtaim GMD measurement data from at least one GIC monitor and one magnetometer in ERCOT There are 27 active GIC monitors and 7 magnetometers in the ERCOT system 12 Completed ERCOT Would fall under everyday responsibilties for each TSP and market participant Monitor GMD related activities at FERC, NERC, IEEE, and EPRI Completed & Ongoing Task 13 ALL