A modulation and sampling based modeling method for the nonlinearities of power converters and its application analysis

Power electronic converters are single input multiple output (SIMO) systems in frequency domain. In distributed power system (DPS), one converter's switching frequency ripples are another converter's perturbations. However, traditional modeling methods only take the frequency of input perturbation into consideration and the power converters are simplified as linear models, which are inappropriate to analyze the high frequency interactions. This paper proposes a modulation and sampling based modeling method to describe SIMO frequency characteristic of power converters and to analyze the oscillations introduced by switching frequency ripples in DPS.