A simplified control strategy for Bi directional DC – DC converter for DC microgrid application

Abstract

Abstract-Renewable energy sources has become tremendous area of attraction for researchers and industrialist. This attraction leads to look for DC micro grid installation to save energy. DC micro grid systems are of different types. Standalone DC micro grid system is very useful for remote places etc. The standalone DC micro grid system uses a battery backup along with renewable energy source. The battery has to be connected with a DC -DC bi directional converter. This bi directional converter decides and controls the flow of power from source to load and battery and from battery to load when source is not available. The control strategy of this bi directional converter plays a very important role for the reliable operation of DC micro grid. In this paper a new simplified control strategy for bi directional DC -DC converter is proposed. A simple automatic control mechanism based on the sensing and comparison of voltages on both sides of the converter has been proposed. This control strategy is aimed at providing a smart, user-friendly, economical and efficient control. Solar Photovoltaic is taken as renewable energy source. The circuit is simulated using PSIM.