Steady State Analysis in Continuous Conduction Mode of a Novel Z-Source Boost Hybrid Converter

Abstract

Combination of Z-source network with the converter or inverter and modification of Z-source inverter is a new trend in research for improving the voltage gain ratio of the converter. Due to a low voltage output of the solar PV (SPV) system, it requires some boosting technique to increase the DC to DC gain ratio or DC to AC gain ratio. For improving the low output voltage of SPV system, a Z-source network is connected in front of any converter and inverter. Z-source network has the property to get the high voltage gain thus the efficiency of the converter is improved. This work briefly explains the improvement of the output voltage gain, by combining the Z-source network with boost derived hybrid converter (BDHC) called Z-source boost hybrid converter (ZSBHC) for solar PV applications. BDHC is a dual output and single input converter which produces AC and DC output simultaneously. The proposed ZSBHC topology improves AC and DC load efficiency, power processing capability and provides inherent shoot-through and reliability. The steady-state analysis of this topology is done in continuous conduction mode. The improvement of the boost factor and each component boosting ratio are derived and compared with the conventional Z-source inverter. The proposed converter circuit is simulated using MATLAB and the output is compared with the conventional BDHC and it is proved that the ZSBHC shows superior performance.