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@bad_hand was wrong. The units for generator speeds are pu, the Hz value can be worked out by timing the base frequency, for example 50Hz. If the speed deviation is -0.05, the frequency deviation should be 48.5Hz.

@bad_hand was wrong. The units for generator speeds are pu, the Hz value can be worked out by timing the base frequency, for example 50Hz. If the speed deviation is -0.05, the frequency deviation should be 48.5Hz.-2.5Hz.