More and more attentions are concentrated on quality evaluation of photovoltaic (PV) power generation in recent years. PV module electrical performance evaluation is the key factor to inlfuence the power conversion efifciency under natural sunlight condition. This paper gives power evaluation method of PV module under outdoor condition based on a distributed crystalline silicon PV system. I-V characteristics of modules used in this distributed PV system is measured under diverse irradiance and temperature condition. According to the procedures comparison of indoor and outdoor I-V measurement, the measurement uncertainty of outdoor measurement is evaluated in detail and illustrated for key inlfuence factors of uncertainty component.%随着光伏电站规模化建设,光伏发电系统的质量评估受到越来越多的关注.光伏组件发电量的性能评估直接影响电站的发电效率及运行状况.本文通过对区域分布式光伏电站晶体硅光伏组件在室外自然阳光条件下的电性能检测及数据分析,研究并制定了相应的光伏组件室外功率评定方法及不确定度评估要求.上海太阳能科技根据区域分布式光伏电站使用的光伏组件开展了不同辐照度、温度条件下的电性能测量及修正算法分析,并根据实验结果对室外自然阳光条件下的电性能特性与室内太阳模拟器下的电性能特性进行了数据对比,确定了影响测量结果不确定度的关键因素.
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