May 2025 NERC Compliance Deadlines, IBR Modeling Alerts & Grid Reliability

A Coordinated Electric System Interconnection Review—the utility’s deep-dive on technical and cost impacts of your project.

Date	Event Name	Type
May 13	Real-Time Operating Subcommittee Meeting	Virtual
May 14	2025 Summer Reliability Assessment Webinar	Online
May 15–29	Multiple Standards Drafting Team Meetings	Virtual
June 3–5	IBR Milestone 3 Industry Engagement Workshop	Arlington, VA / Virtual

1. What is the deadline for the Cold Weather Generator Data Report?
All Generator Owners (GOs) must submit the Extreme Cold Weather Temperature (ECWT) report by May 15, 2025. This year, NERC is allowing a grace period until June 15, 2025 for BES units.
2. Who is required to submit the ECWT data report?
Only NERC-registered Generator Owners with BES facilities in the United States are required to submit. Submissions must be completed by the Primary Compliance Contact or Entity Administrator.
3. What resources are available to help GOs complete the ECWT worksheet?
A revised worksheet with instructions
Training videos and materials
ECWT FAQ document
All are available on the NERC Cold Weather Data Request page.
4. What modeling standards ballots are currently open?
Project 2022-02 – Uniform Modeling Framework for IBRs (closes May 16, 2025)
Project 2021-01 – System Model Validation with IBRs (closes May 21, 2025).
5. What did the IBR Model Quality Alert reveal?
The April 2025 aggregated report revealed:

66% of protection settings do not use full inverter capability
Systemic mismatches in model data formats (.dyr/.dyd, field data, and manual entries)
Insufficient use of equipment-specific models for interconnection studies.
6. What are the key recommendations for improving IBR modeling?
Submit both standard library and user-written PSPD/EMT models
Maintain up-to-date and site-specific model parameters
Align models with FERC LGIP/SGIP interconnection standards
Enhance coordination with OEMs and TPs/PCs.
7. Why is reactive power capability reporting important?
20% of solar PV sites are operating under a “triangle” power factor limitation (0.95 PF), reducing the available reactive support to the grid. NERC urges accurate modeling to reflect true inverter capabilities.
8. What is the Align system outage schedule?
Planned maintenance for the Align system is scheduled from:
May 16, 8:00 p.m. ET to May 17, 4:00 p.m. ET
System updates will be outlined in Release Notes 7.2.0.
9. Which standards are scheduled for enforcement in 2025–2027?
July 1, 2025: IRO-010-5, TOP-003-6.1
Oct 1, 2025: TOP-002-5
Apr 1, 2026: TPL-008-1, CIP-003-9
Jul 1, 2026: CIP-012-2
Apr 1, 2027: BAL-007-1.
10. Where can I find registration links for upcoming NERC events?
You can access all events and register through the official NERC Calendar, including:

IBR Milestone 3 Workshop (June 3–5)

Summer Reliability Webinar (May 14)

In 1995, Sandip (Sonny) R. Patel earned his Electrical Engineering degree from the University of Illinois, specializing in Electrical Engineering . But degrees don’t build legacies—action does. For three decades, he’s been shaping the future of engineering, not just as a licensed Professional Engineer across multiple states (Florida, California, New York, West Virginia, and Minnesota), but as a doer. A builder. A leader. Not just an engineer. A Licensed Electrical Contractor in Florida with an Unlimited EC license. Not just an executive. The founder and CEO of KEENTEL LLC—where expertise meets execution. Three decades. Multiple states. Endless impact.