Single phase grid connected PV system with a non – iterative MPPT

This paper presents a non-iterative maximum power point tracking (MPPT) method for photovoltaic (PV) system. Power from PV is fed to the grid system with a single-stage single-phase inverter. The proposed MPPT method can realize the maximum power using the fill factor from the datasheet parameters of PV panel combined with measurements of open circuit voltage (Voc) and short circuit current (Isc). The non-iterative MPPT algorithm generates power reference used in the control. The single-phase grid connected inverter used double band hysteresis current controller. The converter power circuit is modified to execute Voc and Isc measurements. The proposed method was confirmed by simulation using MATLAB/Simulink. The simulation results under steady state and changing irradiance show that the maximum power from PV can be fed to the grid with THDi = 2.9 % and PF = 0.95.