Critical sampling period for an open-loop perturband-observe (P&O) maximum power point tracking (MPPT) grid-connected solar photovoltaic (PV) system

The critical sampling period depends on the natural angular frequency of the system, but it is very difficult to obtain for a real system. By modeling and simulation of the PV and DC-DC converter modules in the MATLAB/SIMULINK environment, the critical sampling period for an open-loop P&O MPPT grid-connected solar PV system has been determined, and the corresponding optimum percentage overshoot and settling time. Data from a real world 2-MWp grid-connected solar PV system of Volta River Authority (VRA) of Ghana were used for the study.