Risk of System Disturbance
IEEE 1547-2003 has a tight underfrequency protection setting of 59.3 Hz which poses a risk for grid stability. In case of an underfrequency situation, e.g. after a major loss of generation, the situation may get worse when a multitude of distributed energy resources (DER) disconnect simultaneously. IEEE 1547-2003 demands also an obligatory overfrequency disconnection at 60.5 Hz. With a rising share of distributed generation there is a possibility of triggering a non-linear oscillator in the multi GW range within the transmission grid. In Europe, this problem with similar standards has already been addressed by ENTSO-E.
Read more about this topic: IEEE 1547
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