Matlab/Simulink and Experimental Studies of Shading Effect on a Photovoltaic Array

Photovoltaic systems are vulnerable to the change of climatic conditions (temperature and irradiance). They cause a declination in power generation efficiency and reliability. The variation is commonly caused by uniform and non-uniform partial shading. The aim of this paper is to present the nonuniform partial shading impact on the performances of a photovoltaic generator. Hence, a theoretical modeling of a generator composed of two series photovoltaic panels, is presented. The first part provides literature review with mathematical model. The second section offers details of the simulation analysis under diverse partial shading conditions. Keywords— Photovoltaic systems, Shading, PV panels, (P-V) characteristic, (I-V) characteristic.