Abstract
In view of the problems that the local shadow to the photovoltaic (PV) power generation system, which reduces the output power and generates multiple peaks on output power curve, the paper studies the influence of local shadow on the output characteristics of the PV array. Based on the engineering model of the PV array, the piecewise model of the PV array under local shadow is established by the theoretical analysis and the experimental verification is carried out. By using the piecewise model, the output characteristics of PV arrays under different light intensities, occlusion modes, shadow distributions and array patterns are analyzed, which will lay a good foundation for studying the maximum power tracking method of PV system under local shadow.
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