Module integrated isolated solar microinverter by using current unfolding topology

摘要

With the growing demand of energy in the present situation, the world is moving towards renewable energy sources. Due to inexhaustible nature and high energy density solar energy is most preferred out of the lot. Due to different panel orientation and mismatching conditions solar panel may not work efficiently. To overcome this problem a solar microinverter is placed under each panel. The maximum power is extracted from solar panel by maximum power point tracking (MPPT). In this paper the topology employed for solar microinverter is flyback converter with a current unfolding inverter. The topology has got altogether three switches both in the converter and inverter section. As the number of switches are less switching loss will also be less and also the control will be easier. A closed loop voltage control technique is employed along with MPPT to control the switch at the converter side. Converter is operated under discontinuous conduction mode (DCM) for better control over the output voltage. Design and analysis of flyback converter with a current unfolding inverter has been carried out in Matlab/Simulink model.