A detailed model of Z-source converter considering parasitic parameters

Abstract

This paper contributes towards the small-signal analysis of Z-Source converter considering all the losses introduced by non-ideal inductors, capacitor and semiconductor switches. The mathematical model is formulated using state-space averaging method under continuous conduction mode (CCM). The system dynamics are analyzed through computer simulation and reported using frequency response plots and pole-zero plots. The optimum values of the ZSC parameters i.e. the value of inductors and capacitors under CCM operating condition are determined. The effects of equivalent series resistance values (ESR) on the efficiency and boost capability of ZSC are analyzed mathematically, validated with MATLAB/SIMULINK and also with help laboratory proto-type model. � 2018 IEEE.