Interleaved Flyback based micro-inverter for residential photovoltaic application in remote areas

This paper presents a design of a solar micro-inverter. Solar panels are connected through an Interleaved Flyback Converter(IFC), with a flyback transformer playing the role of isolation, and integrated with a full-bridge inverter to provide a 60 Hz, 120 V ac voltage to home loads in remote areas. The proposed interleaved flyback converter for a solar micro-inverter has four stages and is regulated using the voltage loop control and phase shift control. In the proposed interleaved flyback converter, the Resistor, Capacitor, and Diode (RCD) snubber circuit is used for each stage. The Direct-Quadrature (D-Q) rotating frame control is considered for the full-bridge inverter, since it provides good performance. The simulation and experimental results reported in this paper verify the functionality of the designed topology for a solar micro-inverter.