A SINGLE STAGE POWER CONDITIONING OF EXTENDED BOOST QUASI Z SOURCE INVERTER FOR PV APPLICATIONS

Abstract

Modern renewable power generation systems require smart power converters of high efficiency for power conversion . In standalone and grid connected PV systems, the power conditioning unit should be able to provide high voltage gain and boosting capability. This paper presents a new type of power conditioning unit for the photovoltaic power generation systems. The extended q-ZSI provides an effective power conversion technology for interfacing of photovoltaic systems in a single stage . For standalone and grid connected PV systems ,the extended boost q-ZSI provides high voltage boost and high input voltage gain with reduced voltage stress across the switching devices. In this paper two topologies of extended boost q-ZSI namely modified capacitor assisted (MCAEB q-ZSI) and modified diode assisted (MDAEB q-ZSI) has been analyzed and compared with its voltage gain and voltage boost property. The SIMULINK model of both the topologies had been built in MATLAB/ SIMULINK. The experimental prototype model for the three phase modified capacitor assisted extended boost q-ZSI was developed and the results are validated with the simulation results.