An Isolated Multiport Bidirectional DC-DC Converter for PV Battery System

Abstract

This research aims to present “An Isolated Multiport Bidirectional DC-DC Converter for Photovoltaic (PV) Battery System”. The proposed converter is capable of simultaneous power management of various renewable-energy sources. This converter is designed for controlling power of photovoltaic panel, load and rechargeable battery. The advantage of this converter is it utilizes fewer numbers of controllable switches and provides soft switching for converter primary switch. This is achieved by an Inductor-Capacitor-Inductor (LCL) resonant circuit. This converter has an ability to control the battery power when there is a low and extra power according to load and also to control maximum power point tracking for PV system. MATLAB Simulink software is used for simulation studies. The prototype model of this system is implemented. Simulation and hardware results show that irrespective of variation in solar radiation this converter is capable to maintain constant output DC link voltage by managing power between two sources.