Project_2021-01_Modifications_to_MOD-025_and_PRC-019

 

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Status
Nominations are being sought for additional drafting team members through 8 p.m. Eastern, Friday, December 20, 2024. The Standards Committee is expected to appoint members to the drafting team in February 2025. Nominees will be notified shortly after they have been appointed​.

Background
The Federal Energy Regulatory Commission (FERC) issued Order No. 901 on October 19, 2023, which includes directives on new or modified NERC Reliability Standard projects. Order No. 901 addresses a wide spectrum of reliability risks to the grid from the application of inverter-based resources (IBR), including both utility scale and behind-the-meter or distributed energy resources. Within the Order, are four milestones that include sets of directives to NERC. NERC developed a directive mapping document as part of its workplan to address all aspects of Order No. 901. The Milestone 3 projects will address deficiencies within the current state of model quality.

Project 2021-01 will address system-level model verification and validation against actual behavior during disturbances, as well as aligning steady state and dynamic representation, where appropriate. Additional focus will be to develop criteria for performing validation, determine minimum study conditions for conducting validation studies, and develop a process to communicate system interconnection-wide model defects to Transmission Planners and other associated entities.

To facilitate the development of this Milestone, Standard Authorization Requests were assigned to active projects that already had some aspects of Order No. 901-directed modeling improvements and drafting team familiarity with the Reliability Standards to be changed. Project 2021-01 Modifications to MOD-025 and PRC-019 will resume upon completion of this Milestone 3 project.

All Milestone 3 projects must be filed with FERC by November 4, 2025, with full implementation by January 1, 2030, to comply with Order No. 901.​​​

Standard(s) Affected – MOD-033-2 Steady-State and Dynamic System Model Validation

Purpose/Industry Need
The proposed revisions to MOD-033-2 are described in the SAR.

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