Design And Control Strategies of Quasi – Z Source Inverter For Photovoltaic Power Generation Systems

Abstract

The fast decreasing fossil fuel and emission of carbon dioxide pollution leads the researcher to go with alternative energy resource to utilize the power demand and leads the research in the area of power converters. This research work focused on the maximum utilization of PV systems integrated with quasi z source inverter topology. The z source inverter plays a prominent role in PV fed converter, existing much more topology are derived from z source. A few topologies like quasi z source utilizing less number of passive components. Such topology has copious advantages like, voltage boosting capability, reduced inrush current at startup, which might destroy the devices can be avoided. The research work focus on the design and control strategies of quasi z source inverter with PI and FLC controller. The setup is implemented in Matlab/Simulink and to validate the proposed module a laboratory prototype is modeled and designed with FPGA Spartan 6 with power rated 0.8kW with PV volt of 60V and ac output voltage of 220V.