MPPT Design For Photovoltaic System Under Partially Shaded Condition

Photovoltaic (PV) is a device that used to convert solar energy into electrical energy. PV performance affected by internal factor such as internal resistance in PV, material type, etc. Also there are external factor that affected PV's performance such as temperature, light intensity, and partially shaded condition. Partially shaded usually occurs because the PV arrays surfaces are covered by cloud, dirt, trees shade or buildings shade. To reduce partially shaded effect is by adding bypass and blocking diode. When PV arrays in partially shaded condition, conventional MPPT will made an error while searches Maximum Power Point (MPP). MPPT is designed for PV array system in order to produce maximum power. MPPT method that used is Incremental Conductance. This method is equipped with special algorithm to anticipate error in tracking while in partially shaded condition. Simulation shows that PV array system using MPPT without special algorithm, matching efficiency obtained is 82,38%. Meanwhile, when using MPPT with a special algorithm, obtained matching efficiency of 99.95%.