Developing Grid-connected Photovoltaic Power Generation Microinverter for Solar rooftop Systems

Abstract

This paper proposes a single phase grid-connected microinverter for photovoltaic power generation systems. The proposed microinverter topology is based on a flyback converter and an active clamp circuit for reducing effects of output signal spikes. The paper includes modeling and designing the controller for the inverter. And an interleaved flyback module-integrated converter (IFMIC) prototype is developed. The experimental results of the microinverter model show responses during load changing. The controller can track the reference signal within 0.005 seconds. In addition, the experimental results confirm performance of the proposed microinverter compared to the simulation results.