Harmonic Distortion Calculator

Calculate total harmonic distortion (THD) and individual harmonic levels for PV inverter AC output compliance.

Input Parameters

Results

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Total THD
%
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IEEE 519 Status
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True RMS Current
A
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Harmonic Loss Factor
%
Note: IEEE 519-2022 limits current THD to 5% at PCC. Modern PV inverters typically achieve <3% THD with multi-level topologies.

Reference

THD = √(h3² + h5² + h7² + h11²) / 100 × 100% True RMS = I_fund × √(1 + ΣIn²/I1²) Harmonic Loss = (I_rms² − I_fund²) / I_fund² × 100 IEEE 519-2022 limit: THD ≤ 5% for PV systems