A Novel Control Strategy of Battery Management for Grid Connected Photovoltaic System

Power generated from the Photovoltaic Panel is varied in nature it will fetch the unbalance voltage to the grid. The battery is used to normalize the voltage produced by the Photovoltaic Panel. The charge controller is used to monitor the battery. To regulate the battery voltage a novel control strategy is proposed in this paper for the three-phase grid-connected photovoltaic system. The proposed system consists of PV string, Step up Converter, Voltage Source Inverter, Filter and Isolation Transformer. Modified Perturb and Observe Method are used to generate the duty cycle for the Step-up Converter. Level Shifted Pulse Width Modulation is used to generate the gate signal s for the Voltage Source Inverter. The overall design of the proposed system is simulated in Matlab/Simulink environment. The simulation results validate the feasibility of the proposed system.