The Impact of Harmonic Frequency Coupling on Harmonic Calculation

Through MATLAB programming calculations and Simulink simulation results, this paper compares the error indices of two models: the “frequency coupling matrix (FCM)” (considering harmonic frequency coupling characteristics) and the “Norton Equivalent Model” (ignoring harmonic frequency coupling characteristics). The errors indicate that both models exhibit minor errors and high accuracy in harmonic power flow calculations, and the accuracy of the “FCM” is close to that of the “Norton Equivalent Model.” Therefore, it can be inferred that the impact of harmonic frequency coupling characteristics on harmonic power flow calculations can be approximately ignored.