Input Impedance Modeling of Single-Phase Voltage Source Rectifier With
Consideration of FrequencyCoupling Effect
Abstract
Time-periodicity and non-linearity pose a challenge to the precise input
impedance modeling of single-phase power converters. In this study, a
precise input impedance model with measurability of the single-phase
voltage source rectifier (VSR), which considers the frequency-coupling
effect (FCE), is established. Meanwhile, it is revealed that the
rectifier input impedance is dependent of the grid impedance. In the
proposed modeling approach, only Laplace transform and frequencyshifting
operation are required, which avoids the complicated convolution
calculation in the frequency domain. In addition, the influence of grid
impedance on the input impedance is studied. Simulations are conducted
to verify the effectiveness of the proposed method.