Transient Analysis of DC-link voltage for Z-Source Converter Considering Parasitic Parameters

AbstractThis paper now presents an equivalent circuit model and transient analysis of a voltage-type Z-source impedance converter (ZSC) with circuit stray parameters and parasitic parameters existing in passive component of ZSC taken into consideration. Through detailed analysis, the paper studies unwelcome high frequency parasitic oscillation phenomena of the DC-link voltage. The non-linear constitutive differential equations are set up to characterize the transient behavior in the time domain. Simulation results obtained using saber software and experimental results obtained using a laboratory prototype are presented, show parasitic oscillation phenomena of the DC-link voltage, and the simulation results agreed approximately with the experimental ones