A generalised harmonic linearisation method for power converters input/output impedance calculation

A general method for the evaluation of small-signal input impedances of power converters is presented in this paper. The method is based on harmonic linearisation and Fourier analysis techniques and a single-phase boost PFC is considered as case study. The analysis is based on the average model of the converter but no further approximations have been made and both voltage and current loops are included. A comparison between time domain and numerical simulation is presented to validate the proposed model.