ANALYSIS OF SOLAR PHOTOVOLTAIC ARRAY UNDER PARTIAL SHADING CONDITIONS FOR DIFFERENT ARRAY CONFIGRATIONS

This Paper Presents an improved analysis of solar photovoltaic module under partial shaded condition, when a solar photovoltaic array is under partial shading (non-uniform insolation) conditions than there will be large power losses in the array. Cells/modules under shade absorbs significant amount of electric power generated by cells/modules at higher illumination and convert it into heat across the shaded Cells/modules. Under partial shading conditions in the array there exist multiple peaks in power-voltage characteristics. In this paper we have used MATLAB/SIMULINK software, firstly modeling is done for PV module which is further modified to get PV array model. The array current-voltage and power-voltage characteristic is verified from experimentally available characteristics. Analysis has been done for modules connected in series and parallel under partial shading condition. Demerits of series connections under partial shading condition are inferred. The comparison has been made for series and parallel connected solar photovoltaic modules.