Fuzzy Logic based Improved P&O MPPT Technique for Partial Shading Conditions

This paper presents a hybrid method of maximum power point tracking (MPPT) under partial shading conditions for photovoltaic (PV) power generators. The perturb and observe (P&O) algorithm is one of extensively used scheme for MPPT, but in case of partial shading conditions, the P-V curve have multiple peaks and this conventional method may not converge to the global maximum power point (GMPP). Here, whole search space of MPP is divided into three regions and a fuzzy logic controller has been proposed to identify the region of GMPP. After identification P&O algorithm is used to track the GMPP. Detailed analysis of the proposed scheme is done using MATLAB/Simulink software.