Analysis and design of fuzzy based PWM controller for solar power generation

This paper presents the designing of a SIMULINK model based on solar power generation scheme. The bidirectional converter charges the battery, whenever PV module generates excess power. Battery discharges power to the load during low solar irradiation. SOC (State of Charge) control of battery is provided to avoid complete discharge. In practice, the battery charging circuit is connected before load. In this work to extract maximum power from PV module, the battery charging unit and battery is connected near to the source to reduce the number of power conversion stages. The control of power is achieved through DC-DC Converter by controlling the gate pulses using fuzzy based PWM technique. A DC-AC converter is associated to feed power to AC load. The simulation results of designed system are validated and compared with the conventional PID controlled system during constant and varying irradiance and load.