Design and Implementation of a Three Phase Inverter for Renewable Energy Source with Unified Control Strategy

Microgrids are becoming widespread because of their evident benefits which comprise of the improved reliabilities they can operate with and their lower emission levels over the conventional generation Thus the face of electricity generation is experiencing modifications as technological improvements are emerging to mitigate the problems of increasing cost and the pollution caused due to excessive use of fossil fuel based electricity generation to meet our ever growing demands. Microgrids utilize renewable energy sources (RES) viz. photovoltaic cells, fuel cells, wind etc. instead of using the conventional fuels. As the energy requirement of the world is growing enormously and will continue to rise as year's progress, RES's are surely a solution to the above problems. This paper deals with design of photovoltaic (PV) based three phase grid connected voltage source converter with unified control strategy (UCS). The UCS takes into consideration the general feedback requirements for desired response and performance from the microgrid and at the same time includes a feedforward control for DC bus control. Simulation results attained are been presented in this paper.