Frequency Response Calculator

Calculate inverter frequency droop response and power curtailment for grid support functions.

Input Parameters

Results

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Frequency Deviation
Hz
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Deviation
%
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Power Change
kW
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Output Power
kW
Note: IEEE 1547-2018 requires frequency-watt capability. Over-frequency reduces power output; under-frequency can increase output if headroom exists.

Reference

Frequency Deviation = f_measured − f_nominal Deviation % = (Δf / f_nom) × 100 Power Change = −(Δf% / Droop%) × P_rated Output Power = P_rated + Power Change 5% droop = 100% power change for 5% freq change