Related Files
Status
An informal comment period for the Project 2025-04 Order No. 901 Planning Studies Standard Authorization Request (SAR), is open through 8 p.m. Eastern, Wednesday, October 1, 2025.
The nomination period for drafting team members concluded at 8 p.m. Eastern, Thursday, September 18, 2025.
Background
The proliferation of Inverter-Based Resources (IBRs) pose a significant reliability risk to the electrical grid. On October 19, 2023, the Federal Energy Regulatory Commission (FERC) issued Order No. 901 directing the development of a new or revised Reliability Standard to address reliability concerns related to IBRs at “all stages of interconnection, planning, and operations."[1] In January 2024, NERC filed the initial Standards Development Work Plan to address the FERC Order No. 901 directives (hereafter referred to as the “Work Plan"). The Work Plan discusses how NERC will develop Reliability Standards within three tranches (Milestones 2, 3, and 4) to meet FERC's filing deadlines. Milestone 4 of the Work Plan covers operations and Planning Assessments. This Standard Authorization Request addresses Milestone 4 – Group 2 of the Work Plan, related to planning studies.
The Standard Authorization Request was provided to the Reliability and Security Technical Committee (RSTC) during its June 2025 meeting for its review and comments. FERC Order No. 901 requires that a new or revised Reliability Standard must be filed by November 4, 2026.
Standard(s) Affected: TPL-001-5.1, MOD-026, MOD-032, MOD-033, PRC-024, PRC-028, PRC-029
Purpose/Industry Need
FERC Order No. 901 addresses a wide spectrum of reliability risks to the grid from the application of Inverter-Based Resources (IBRs), including both utility scale and behind-the-meter or distributed energy resources (DERs).
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[1] Order No. 901, Reliability Standards to Address Inverter-Based Resources, 185 FERC ¶ 61,042 (2023) at P 25 [hereinafter Order No. 901].
