PRC-028 Insights

A Look at PRC-028: New Disturbance Recording Requirements for IBRs

One of the new IBR-specific standards going into effect is PRC-028, which lays out disturbance recording requirements for facilities with Inverter-Based Resources. Like PRC-002, it requires affected entities to install and maintain monitoring equipment that can capture detailed data during fault events.

To start, Requirement 1 states that Sequence of Events Recording (SER) must be enabled for breakers that connect to the transmission or collector system. It also requires that each IBR unit can record fault codes, fault alarms, and frequency/voltage ride-through performance.

Requirements 2 and 3 cover Fault Recording (FR): Where it’s needed and what technical data must be captured.

Requirements 4 and 5 focus on Dynamic Disturbance Recording (DDR). They require continuous DDR capability at each main power transformer, including the data that must be recorded and where that recording must happen.

All this data has to be provided upon request to the Transmission Planner, Planning Coordinator, Regional Entity, or NERC. Requirement 7 lays out timelines: entities have 20 calendar days to retrieve the data and 15 calendar days to provide it once requested. If a monitoring function fails, the entity must either restore it or submit a Corrective Action Plan to the Regional Entity within 90 days.

In short, PRC-028 brings a new set of disturbance recording obligations for Generator Owners with IBRs—covering SER, FR, and DDR. While there’s a three-year implementation window, some of the requirements may take significant planning, coordination, and investment to meet.