An Improved P&O MPPT Algorithm Under Partial Shading Conditions

Abstract

This paper proposes a modified perturb and observe (P&O) maximum power point tracking (MPPT) technique under partial shading conditions for a photovoltaic (PV) system. Two algorithms proposed in the literature are combined and modified for this work. The advantages of the modified technique include accuracy and simplicity of implementation. The idea behind the modification is the combination of an adjustable step size algorithm and inspection algorithm which determines the global maximum power point (MPP) by comparing all multiple MPPs. A simulation was carried out in MATLAB/Simulink to confirm the effectiveness of the proposed improved technique.