Comparative Analysis of Solar PV Array Under Mismatch Condition

Abstract

One of the most promising forms of renewable energy is solar photovoltaic (PV) energy, which directly generates electric power from sun irradiation. Since the solar photovoltaic system has non-linear nature, therefore despite the benefits, partial shading presents a significant barrier to photovoltaic (PV) systems’ efficient utilization. Partial shading may be due to nearby buildings, trees, electric poles, etc. Partial shading reduces the maximum power output of photovoltaic arrays, and arrays have a few peaks in their PV characteristics. The output power reduction depends on the shading pattern, array structure, and physical placement of the array’s modules rather than being exactly proportional to the shading area. There are numerous techniques that can be used to mitigate partial shading problems in a photovoltaic (PV) array. One of the most productive methods to avoid this barrier is by adopting a reconfiguration strategy. In this article, to reduce the consequences of partial shadowing, a strategy of PV array reconfiguration is implemented. There are several other topologies that can be implemented to reduce the impact of partial shading, among them the five topologies described here: Total Cross Tied (TCT), Honey-Comb (HC), Series Parallel (SP), Bridge-Link (BL), and Su-Do-Ku. In this article, numerous performance parameters such as short circuit current, global maximum output power, and open circuit voltage are taken to examine the effectiveness of each topology. In furthermore, the fill effect is taken into account in order to conduct a fair comparative analysis under various shading patterns. The responses of each pattern are carried out in Matlab/Simulink.