Control Strategy for Switched-Impedance Quasi-Z-Source Inverter

Abstract

A proportional integral regulation method for enhanced-boost quasi-z-source inverter (EB-qZSI) is presented in this paper. The PI controller is mostly preferred as it prevents noise and major disruptions throughout the operating procedure also aids in reduction of steady flow error which improves system steadiness. Along with this a generic approach for processing sinusoidal pulse width modulation (SPWM) for EB-qZSI is presented. The EB-qZSI extract continuous current from the supply and this is considered as the major advantage of this inverter in comparison with other ZSIs. The EB-qZSI provides higher voltage boost, lower stress across the capacitor and lesser total harmonic distortion (THD) value. The continuous input current configuration is analysed and simulation study is carried out through Matlab Simulink software.