Partial Shading Losses in Half-Cut PV Modules: Experiments, Circuit Simulation, and an Analytical Loss Function

作者：Jing-Wu Dong, Jyun-Guei Huang, Yu-Min Lin, Kuan-Wei Lee, Yuqian Ye, Che-Yu Lin · 发表于：IEEE Journal of Photovoltaics · 年份：2025 · DOI：10.1109/jphotov.2025.3642887 · 研究领域：Photovoltaic System Optimization Techniques、Photovoltaic Systems and Sustainability、Silicon and Solar Cell Technologies

This study establishes an integrated approach to quantify partial shading losses in commercial half-cut photovoltaic modules. Systematic indoor experiments were conducted on a 440 W c-Si half-cut module, providing current-voltage data under controlled shading. The data were used to calibrate a detailed LTspice circuit model. Further, an analytical loss function was developed to predict power losses as a function of shaded substring fraction and configuration. This analytical loss function was then refined through empirical fitting to the experimentally validated LTspice model, and it closely matches both the designed simulation conditions used for data fitting and independent representative shading scenarios. This framework offers a reliable and efficient tool for predicting shading losses in series-connected half-cut PV modules, facilitating more accurate system design and performance assessment.