A sliding mode based on fuzzy logic control for photovoltaic power system using DC-DC boost converter

To extract the maximum power from a photovoltaic (PV) energy system, the real-time maximum power point (MPP) of the PV array must be tracked closely. The nonlinear and time-variant characteristics of the PV array and the non-linear and non-minimum phase characteristics of a boost converter make difficult to track the MPP for traditional control strategies. In this paper, the design of a maximum power point tracking for the solar PV module is presented. The design consists of a DC to DC Boost converter for impedance matching to transfer the maximum power controlled by the Duty cycle. By using sliding mode control based on fuzzy logic (SMC-FLC) the MPPT is able to track the maximum power of the PV array quickly despite the rapid changing of sunlight intensity.