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Enhancement of PV Array Performance during Partial Shading Condition

Ahmed M Mahmoud, Salah M Saafan, Ahmed M Attalla, Hamdy El-goharey

The partial shading of photovoltaic array (PV) may be caused by neighbour building, trees, dust and clouds. The effects of partial shading on PV array characteristics are presented and a comparative literature review on methods to mitigate these effects and the drawbacks of this method are provided. A new technique for enhancement the output power of PV array is suggested. Simulation carried out by using MATLAB/Simulink under different irradiance conditions. The results investigated the conducting of bypass diode under partial shading condition and its effect on the output power of the PV array then illustrate the optimization of PV array output power by using a new suggested technique where The output power of the PV array increased by 56% under partial shading condition with using the new proposed technique.