Today’s LiveWire Spotlight looks at two new NERC Lessons Learned, where a generator’s transient response increased the risk of a wide area electric system outage  They describe events due to poor change control and line faults that should have evoked no generator response – and offer recommendations that will prevent future recurrences.

The inability of generators to provide voltage and primary frequency response during an event is one of NERC’s top reliability concerns.  Severe penalties may be levied if an outage occurs because an Entity did not act upon these Lessons Learned.