IEVref:603-04-08ID:
Language:enStatus: Standard
Term: droop of a set
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Definition: the ratio of the per-unit change in frequency (Δf)/fn (where fn is the nominal frequency) to the per-unit change in power (ΔP)/Pn (where Pn is the nominal active power of the rotating machine):

σ = (Δf/fn) / (ΔP/Pn)


Publication date:1986
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