Performance Investigation of Fuzzy Logic Controlled MPPT for Energy Efficient Solar PV Systems

This paper deals with the mathematical way of modeling solar panels involving mathematical equations for the calculation of solar panel current. Along with the conventional inputs series and shunt resistances are taken as additional inputs. Maximum Power Point Tracking (MPPT) algorithms implementing Perturb and Observe (P&O) and fuzzy logic techniques having the same voltage and current variables as inputs are implemented and their efficiencies are checked. A standard configuration of the boost converter employing a MOSFET device as a switch is implemented to obtain a constant DC output voltage. The MPPT algorithms identify the duty cycle at which the gating pulses have to be given to the switching device so that triggering occurs at the maximum power point thereby delivering maximum power to the load. Simulation results are obtained in MATLAB Simulink environment based on the mathematical and electrical models developed.