光伏发电子系统局部阴影检测性能评估：阵列构型对比研究

Partial Shading Detection (PSD) can determine whether PS occurs and assist in selecting the appropriate Maximum Power Point Tracking (MPPT) algorithm, thereby improving the performance of Photovoltaic Generation Systems (PVGS). Most PSD methods focused on examining the series configuration of a PVGS. Nonetheless, the typical array configurations for a PVGS encompass Series-Parallel (SP), Total-Cross-Tied (TCT), and SP-TCT arrangements. Therefore, the effectiveness of a PSD under different PVGS array configurations needs to be investigated, as these configurations can alter a PVGS’s output curves and degrade the performance of conventional PSD methods. This paper proposes an enhanced PSD method based on the parameter estimation of a PVGS and the determined PS factor. This paper uses PVGSs composed of $3\times 3$ and $5\times 5$ PV panels to verify the enhanced PSD method. The performance of the enhanced PSD is then validated through various PVGS array configurations and PS patterns under different solar irradiances. PS patterns, including column, row, diagonal, and corner, are examined for the PVGS. Experimental results demonstrate the efficiency and effectiveness of the enhanced PSD. Since PVGS array configurations alter the output characteristic curves, tracking the Global Maximum Power Point (GMPP) is possible even when PSD results are incorrect. Simulation results indicate that the proposed enhanced PSD achieves high PSD correctness and maintains excellent GMPP correctness even when incorrect PSD results are encountered.