Performance Investigation of Different Bypass Diode Topology Based SDK-PV Arrays Under Partial Shading Conditions

In this paper, a detailed study is carried out on the SuDoKu (SDK) PV array topologies under different shading patterns. The aim of this study is to investigate the impact of different types of bypass diode arrangements connected to the SDK-PV array under non-uniform irradiations, which are without bypass diode (WBD), non-overlapped bypass diode, (NBD) and overlapped bypass diode (OBD). Under partial shaded conditions, the power versus voltage (P–V) and current versus voltage (I–V) characteristics exhibit extreme nonlinearity along with multiple peak points. The modeling of SDK-PV array with various types of bypass diode topologies is carried out in MATLAB/Simulink environment. The result shows that the NBD-based SDK-PV array produced maximum output power and short-circuit current, amongst all the bypass topologies studied.