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NERC warns solar PV operators of inverter issues during grid disturbances

The North American Electric Reliability Corp. ( NERC) warned that disturbances to the electric power grid due the loss of inverter-based resources warrants a handful of actions that generator owners must take before the end of June.

NERC issued the Inverter-Based Resource Performance Issues Alert on March 14 and sent it to generator owners of bulk electric system solar photovoltaic (PV) generating resources.

The alert came after NERC analyzed what it said were “multiple large-scale disturbances” in 2021 and 2022 involving the widespread loss of inverter-based resources. These events led to “abnormal performance” across solar PV generating resources on the bulk electric system.

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