Digital controller of DC-DC converter for solar cell module

This paper presents a digital controller in closed loop of DC-DC converter for solar cell. Solar cell output voltage changes according to atmospheric changes. The digital controller is designed using PI controller which is connected in closed loop. The function of digital controller is taking the sample values continuously and comparing with reference signal to maintain the constant value. Pulse width modulation changing the switching of MOSFET which reduces harmonics in the output. PSIM software is used for proposed design and simulation results are presented.