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Analysis of inhomogeneous local distribution of potential induced degradation at a rooftop photovoltaic installation

机译:屋顶光伏装置中潜在诱发降解的不均匀局部分布分析

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Potential induced degradation (PID) of photovoltaic (PV) modules is one of the frequently observed failures in PV installations nowadays. This study investigates the inhomogeneous and complex PID generation on rooftop installations on industrial buildings as well as its impact on the module performance. The PID development is exemplarily presented for a 314kWp PV-plant installed in the Atlantic coastal climate. Due to the complex plant geometry and resulting irradiation situation the existence of PID could not be identified based on the annual yield data. By Infrared imaging PID was clearly identified. Evaluating historic monitoring data, the impact of PID on the string and plant performance could be quantified. A linear correlation between the defect ratio and the performance rate as well as the degradation loss rate could be formulated.
机译:光伏(PV)模块的潜在诱发退化(PID)是当今PV安装中经常观察到的故障之一。这项研究调查了工业建筑屋顶装置上不均匀和复杂的PID生成及其对模块性能的影响。对于安装在大西洋沿岸气候中的314kWp光伏电站示例性地介绍了PID开发。由于复杂的工厂几何形状和由此产生的辐照情况,无法根据年产量数据确定PID的存在。通过红外成像可以清楚地识别出PID。通过评估历史监控数据,可以量化PID对管柱和工厂性能的影响。可以建立缺陷率与性能率以及劣化损耗率之间的线性关系。

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