Modules · Event analysis · Module 082
PRC-030-1 Unexpected Event Mitigation
Qualifying changes in your plant's real power output detected, and the event analysis and corrective action plans tracked to closure.
About this module
What this module covers.
PRC-030-1, effective October 1, 2026, requires Generator Owners of inverter-based resources (IBRs) to identify, analyze, and mitigate unexpected changes in power output. Generator Owners must implement a documented process to detect any complete facility loss or real power output change of at least 20 megawatts (MW) and at least 10% of the plant's gross nameplate rating within a 4-second period, excluding changes due to intermittent resource variability, planned outages, or certain system misoperations. When such an event occurs, the Generator Owner has 90 days to analyze the event, determine root causes, document ride-through and reactive power response, assess performance issues, and determine whether the findings apply to other facilities. If corrective actions are needed, a Corrective Action Plan (CAP) or a technical justification must be developed within 60 days, provided to the relevant reliability entities, and updated as necessary, with all actions and communications documented and retained for compliance purposes.
This module covers the preparation of compliance procedures and assessment documentation for PRC-030-1, with qualifying events detected from your plant data and carried through the compliance workflow.
Module: 082
Kind: Event analysis
Governing body: NERC
Applies to: Operating plants
Typical time: Days per event, not weeks
Dashboard capabilities
- Your one-second supervisory control and data acquisition (SCADA) exports are screened under R1 for a complete loss of output or a real power change of at least 20 MW and at least 10% of gross nameplate within 4 seconds, with changes caused by irradiance or dispatch screened out.
- A relay record from the relay mapped to your point-of-interconnection breaker that shows the breaker trip raises a complete-loss-of-output event at the trip instant, with the MW loss filled in once you supply the SCADA or historian export; feeder relay records do not raise a PRC-030-1 event.
- If your plant profile has no point-of-interconnection breaker mapping, the record is held for review with the missing mapping named, so you can complete the profile.
- From the event you open the automated PRC-030-1 compliance workflow, which carries the event from the R2 analysis to the CAP or technical justification.
- The R2 analysis deadline is set 90 days after the event date in your plant's time zone and tracked as a task on your plant.
Support services
What GridStrong does inside this module.
Task 1: Develop Compliance Procedure
- Create an audit-ready compliance procedure for meeting the PRC-030-1 requirements, working collaboratively across your engineering and compliance departments. This includes:
- Identifying applicable assets, functions, subject matter experts (SMEs), roles, responsibilities, and ownership
- Determining specific actions and evidence to demonstrate compliance with specific requirements and measures
- Conducting a gap analysis comparing current practices with the new requirement, identifying missing processes, incomplete documentation, any staff training needed, etc.
- Developing clear step-by-step procedures for PRC-030-1 that align with your internal controls and documentation policies
- Establishing compliance timelines that align with the standard's implementation deadlines
- Defining specific compliance evidence per site
Task 2: Conduct Performance Validation (for each event you identify)
- Analyze inverter, power plant controller, or protection scheme issues, failures, misoperations, control issues, or other anomalous performance issues
- Conduct root-cause analysis for unexpected IBR performance, including changes in real power output, tripping, or other anomalous performance as described by the standard
- Coordinate with the necessary internal and external parties to gather data, conduct analysis, or determine corrective actions
- Identify potential IBR plant performance issues or corrective actions that need to be made based on the key findings from the analysis
- Conduct simulation studies and assess IBR ride-through performance, where needed, including reactive power response during disturbances, by comparing simulation results with measurement recordings, and identify protection scheme failures, control issues, or modeling inaccuracies
- Propose corrective actions or provide technical justifications if no corrective action is required
- Determine the applicability of findings to your other IBR plants
Final deliverables
- Task 1: Compliance procedure for PRC-030-1.
- Task 2: Performance validation report for each identified event, including root cause analysis, key findings, and recommendations per the requirements of PRC-030-1.
What we need from you
- One-second plant output SCADA or historian exports for each event.
- Relay event records for point-of-interconnection breaker operations.
- Your plant profile's mapping of the point-of-interconnection breaker and its relay.
Assumptions and considerations
How the scope is bounded.
- You supply all necessary site-specific documentation and event data to conduct the event analysis.
- You supply the one-second SCADA or historian exports and relay records; our R1 detection, or your notification where no export is supplied, starts an event analysis for that IBR site.
- We do not assume liability for any data or information you supply that is inaccurate or incorrect.
- Data is assumed to be time synchronized or to carry accurate time stamps across data sources.
Other modules
Every module runs on the same record.
Run this module on one site.
Tell us the plant and the deadline. An engineer confirms the inputs, the schedule and what the Dashboard needs from you.