A New Quazi Z-Source Seven-Level inverter for Photovoltaic Applications

Abstract

This work presents a Quazi Z-Source Seven-Level inverter (qZS7LI) for Photovoltaic (PV) applications. The presented topology partakes the benefit of having a lesser switch count (8 switches) compared to current 7-Level qZ source topologies. The presented qZS7LI consists of three quasi-Z-source based impedance network, 02 bidirectional power switches, and one H-bridge inverter. The presented qZS7LI topology is studied by using pulse-width modulation (PWM) technique. The bidirectional switches and one leg of the H-bridge inverter are employed to insert shot through and generate levels, operating at a high frequency. The PWM control approach offered, together with the corresponding switching systems for each level of generation, are presented. Both simulation and the experimental results validates the operation of presented qZS7LI. A concise comparison is constructed to emphasize the advantages of the suggested qZS7LI topology in contrast to standard topologies.