Maximum power point tracking by incremental conductance method for photovoltaic systems with phase shifted full-bridge dc-dc converter

Because of sunshine variation, output power of photovoltaic (PV) array can be fluctuated. In order to obtain fully utilization from the PV array, an algorithm of maximum power point tracking (MPPT) functions with a high efficiency of dc-dc converter is necessary. This paper presents a phase-shifted full-bridge dc-to-dc converter which is appropriate for PV application. Correspond to power switches signals; operation modes of the converter are described. By neglect of shading condition, two classical algorithms of MPPT; i.e. Incremental Conductance (INC) method and Perturbation and Observation (P&O) method are applied to the converter. The simulation results of 3kW PV array together with the converter show that the INC method is more appropriated than the P&O method because it gives a higher speed and accuracy of system performance.