Resource Hub
The standards, deadlines and guidance for inverter-based resources, in one place.
Free and written by the engineers who run the studies: what each standard requires, when it applies, and what to do first.
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Six ways in, depending on what you need today.
Standards Help Center
One page per standard: what each requirement says, who it applies to, the dates, the evidence an auditor expects, and a free template procedure.
Open the Help CenterCompliance Calendar
Effective dates and compliance deadlines for the NERC standards and ERCOT rules that apply to inverter-based resources.
See the datesISO/RTO Comparisons
Side-by-side tables of how NERC and the ISOs set the same requirement, each with the date we last checked it.
Compare the rulesClient Guidance
Short briefs from our engineers on deadlines, enforcement, model quality and interconnection. Free PDFs.
Get the documentsInsights
Articles from our engineers on ride-through, disturbance monitoring, modeling and large loads.
Read the articlesEvents & Talks
Conference talks and papers by our engineers, with the people who gave them.
See the talksInsights: compliance and deadlines
Articles on the ride-through, monitoring and registration standards.
IBR Compliance in 2026: Registration, EMT Models and IEEE 2800
Where things stand on NERC Category 2 registration, PRC-029-2 and PRC-030-1, MOD-026-2 and PJM's IEEE 2800-based interconnection requirements, and what generator owners do next.
Read the guideIBR Compliance Dates 2026 to 2030: PRC-028/029/030 and MOD-026-2
PRC-029-2 and PRC-030-1 took effect October 1, 2026, with Category 2 dates on January 1, 2027; PRC-028-1 monitoring phases in through 2030; and MOD-026-2, effective April 1, 2026, makes EMT models due from 2029. Dates and an action plan.
Read the guideNERC Category 2 IBR Registration After May 15, 2026
Category 2 registrations took effect May 15, 2026. What registered owners now owe, and what to do if a facility was missed.
Read the guideEssential PRC-029 Compliance Steps For IBR Plant Operators
PRC-029 sets critical ride-through requirements for inverter-based resources (IBRs).
Read the guidePRC-029-2 Turns Compliance into a Closed-Loop Discipline
PRC-029-2 makes IBR ride-through performance-based, so design, models and event data need to be managed together.
Read the guideSER vs FR vs DDR
PRC-028-1 & ERCOT NOGRR 255 demand SER, FR & DDR - know what to record and how to pass audits.
Read the guideModeling and interconnection
What the operators now expect in a model package.
Power System Frequency: Are We Measuring It, or Estimating It?
NERC PRC-029-2 describes frequency as typically measured over 3 to 6 cycles, a figure that matches classical zero-crossing methods. Modern DFT and Kalman filter techniques achieve better accuracy in fewer cycles, raising the question: should standards specify accuracy targets instead of cycle counts?
Read the guideMeeting ERCOT's Model Quality Testing Requirements
An overview of ERCOT's Model Quality Testing (MQT) and the PGRR109 dynamic model reviews for IBRs, what each requires, and common problems owners run into.
Read the guidePJM's Model Verification Guidance
What PJM's MOD-026/027 guidance (Revision 4, July 2025) asks Generator Owners to submit, and what changes as MOD-026-2 phases in.
Read the guideData centers
The load side of the queue.
Data Center Modeling 101
Translate data center reliability risks into utility-ready models: powerflow, EMT, short-circuit & harmonics.
Read the guideData Centers & Grid Reliability
AI data centers are not "just loads": fast ramps, ride-through and power quality create new grid reliability risks.
Read the guideHow GridStrong models a data center as a plant
Interconnection studies, ride-through evaluation against the operator's suite, and requirements tracking on one record.
See the approachSee it on your fleet.
A working session with a GridStrong engineer on your plants, your standards and your queue positions.