Single-Phase Semi-Z-Source Inverter for PV Applications

Abstract

This paper introduces the Semi-Z-Source Inverter (SZSI) in conjunction with Photovoltaic (PV) technology due to its advantages over the traditional singlephase Voltage Source Inverter (VSI). Unlike the single-phase inverter, the SZSI utilizes only two switches instead of four, offering a more streamlined design. Additionally, the SZSI maintains a lower common mode voltage by sharing the same reference between both its DC and AC sides. While the Z-Source Inverter (ZSI) includes an additional state known as the shoot-through state, the SZSI functions without requiring this extra state. The effectiveness of the proposed system has been confirmed through validation using PSIM software.