Shading Issues in Photo-voltaic Modules and its Performance Assessment

Photovoltaic (PV) system is considered to be the main renewable energy resources available. The high infiltration and ease in electricity generation are accomplished from the fact that PV system is one of the largest energy sources accessible among all the available energy sources. Under uniform atmospheric conditions, one can get useful and required electricity. In this paper, various types of shading are discussed. Different factors affecting the parameters of PV panel are reviewed. Shading causing factors and steps to minimize the shading is deliberated. Bypass diode and its importance on PV panel are explained. Further, the Simulink model of PV panel is developed for series-parallel configuration to assess the shading effect. The results show that shading adversely affects the PV performance.