NERC PRC-029 Compliance in 2026 – Are You Ready?

PRC-029-1 establishes minimum ride-through criteria for frequency and voltage excursions, requiring inverter-based resources (IBRs) including solar, wind, and battery storage to remain connected during grid disturbances. This standard adopts IEEE-2800 performance curves—more stringent than previous PRC-024 requirements—as well as added performance requirements. 

Time Sensitive: Compliance Deadlines

BES IBRs face an October 2026 compliance deadline, while Non-BES IBRs must comply by January 2027. Time is running out to complete the comprehensive modeling, testing, and documentation required. 

• Category I (BES IBRs): October 1, 2026 
• Category II (Non-BES IBRs): January 1, 2027 

Key Technical Requirements:  

Your facility must demonstrate capability to: 

• Ride through voltage and frequency excursions per IEEE-2800 curves 
• Handle instantaneous phase angle jumps of up to 25 degrees 
• Withstand a rate of change of frequency (RoCoF) of at least 5Hz/second 
• Maintain dynamic voltage performance throughout disturbances
• Document hardware limitations for R4 exemption eligibility (legacy equipment only) 

EPE's Comprehensive Compliance Roadmap 

Phase 1: As-Built Model Development 

• As-left site data collection
• OEM documentation and model acquisition 
• Setting parameterization with manufacturer specifications

Phase 2: Simulations & Evaluations 

• EMT-based ride-through testing (R1-R3 requirements) 
• Performance evaluation against IEEE-2800 curves 
• Control and protection setting optimization 

Phase 3: Setting Optimization 

• Fine-tune control settings within equipment capability 
• Maximize ride-through performance 
• Coordinate protection settings to prevent nuisance tripping 

Phase 4: Compliance Documentation 

• Audit-ready compliance evidence packages 
• Hardware limitation documentation (R4 exemptions) 
• Technical justification reports 

Why Choose EPE?

• Proven EMT Modeling Expertise – We are specialists in OEM-specific parameterization.
• OEM Collaboration – EPE has established relationships with major manufacturers.
• End-to-End Service – We facilitate your project from data collection to final documentation.
• Regulatory Experience – Our experts have deep understanding of NERC compliance requirements 
• Timely Delivery – We understand your deadline pressure and can help you meet your commitments with confidence.

Don't Wait – Act Now

A limited number of vendors are available and it's important to secure a place on their schedule as soon as possible to avoid delays. The complexity of EMT modeling, OEM coordination, and testing means compliance cannot be rushed at the last minute. 

To get started discussing your PRC-029 compliance needs, contact the EPE team today using the form below.