Closed loop digital controller of DC-DC converter for renewable energy source (PV Cell)

This paper presents a closed loop digital controller of boost converter for renewable energy source like photovoltaic (PV) cell. PV cell efficiency varies according to weather conditions. The control loop is analyzed and the digital controller is designed using PI controller. The closed loop taking the sample values and continuously comparing reference signal with the output current and voltage to maintain a maximum constant output voltage. Even by changing the load value, output voltage and current kept constant. Also PWM switching frequency of MOSFET increases the performance of converter. The proposed design simulates in PSIM software and results are presented.