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Control of the STC power in PV modules' supplies for utility scale plants
Progress in Photovoltaics ( IF 8.0 ) Pub Date : 2019-08-06 , DOI: 10.1002/pip.3174
Leonardo Pérez 1, 2 , Jorge Coello 2 , Eduardo Lorenzo 2
Affiliation  

This article presents a specific procedure to control the standard test conditions (STC) power in photovoltaic (PV) modules. It also shows the results of its application on a supply of approximately 700 000 multicrystalline p‐type silicon BSF technology PV modules made by a worldwide known manufacturer (Tier‐1, Q4 2015). First, during the manufacturing process, the analysis of the STC power measurements of the whole supply carried out by the modules' manufacturer is included, where the quality of these measurements was evaluated through a comparative contrast study in an independent laboratory on a sample of 4000 modules. In addition, the light‐induced degradation (LID) on 180 modules and the resistance to the potential induced degradation (PID) in a sample of 125 modules were characterized and critically analyzed. Secondly, during operation phase, the analysis of the STC power after the first 2 years of operation of the modules in desert conditions was also included. These measurements were carried out on a sample of 2000 modules making use of an accredited mobile laboratory. The overall results showed the effectiveness of the implementation of the aforementioned procedure, which is based on the use of a set of reference modules (primary standards) with common calibration origin. It proved to be an effective way of reducing uncertainties all along the quality control process. The susceptibility to PID, as observed on the PID test (chamber method) specified in IEC TS 62804, was practically negligible, and the average LID degradation after 20 kWh/m2 of exposition to the sun was 1.5%. Finally, the degradation rate in the second year of operation was 0.32% with respect to the initial degradation occurred during the whole first year.

中文翻译:

用于公用事业规模工厂的光伏模块电源中的STC电源的控制

本文介绍了一种控制光伏(PV)模块中标准测试条件(STC)功率的特定过程。它还显示了其在全球知名制造商生产的约70万片多晶硅p型BSF硅多晶硅光伏技术组件上的应用结果(Tier-1,2015年第4季度)。首先,在制造过程中,包括了模块制造商对整个电源的STC功率测量结果的分析,其中,这些测量的质量是通过在独立实验室中对4000个样本进行的对比对比研究来评估的模块。此外,对125个模块的样本中的光诱导降解(LID)以及对125个模块的样品的潜在诱导降解(PID)的耐受性进行了表征并进行了严格分析。其次,在运行阶段,还包括在沙漠条件下模块运行前两年后STC功率的分析。这些测量是使用经过认可的移动实验室在2000个模块的样本上进行的。总体结果表明,上述程序的实施效果是有效的,这是基于使用具有相同校准起点的一组参考模块(主要标准)的结果。它被证明是减少整个质量控制过程中不确定性的有效方法。在IEC TS 62804中规定的PID测试(室方法)中观察到的对PID的敏感性实际上可以忽略不计,并且20 kWh / m后的平均LID劣化 还包括在沙漠条件下运行模块的前两年后STC功率的分析。这些测量是使用经过认可的移动实验室在2000个模块的样本上进行的。总体结果表明,上述程序的实施效果是有效的,这是基于使用具有相同校准起点的一组参考模块(主要标准)的结果。它被证明是减少整个质量控制过程中不确定性的有效方法。在IEC TS 62804中规定的PID测试(室方法)中观察到的对PID的敏感性实际上可以忽略不计,并且20 kWh / m后的平均LID劣化 还包括在沙漠条件下运行模块的前两年后STC功率的分析。这些测量是使用经过认可的移动实验室在2000个模块的样本上进行的。总体结果表明,上述程序的实施效果是有效的,这是基于使用具有相同校准起点的一组参考模块(主要标准)的结果。它被证明是减少整个质量控制过程中不确定性的有效方法。在IEC TS 62804中规定的PID测试(室方法)中观察到的对PID的敏感性实际上可以忽略不计,并且20 kWh / m后的平均LID劣化 总体结果表明,上述程序的实施效果是有效的,这是基于使用具有相同校准起点的一组参考模块(主要标准)的结果。它被证明是减少整个质量控制过程中不确定性的有效方法。在IEC TS 62804中规定的PID测试(室方法)中观察到的对PID的敏感性实际上可以忽略不计,并且20 kWh / m后的平均LID劣化 总体结果表明,上述程序的实施效果是有效的,这是基于使用具有相同校准起点的一组参考模块(主要标准)的结果。它被证明是减少整个质量控制过程中不确定性的有效方法。在IEC TS 62804中规定的PID测试(室方法)中观察到的对PID的敏感性实际上可以忽略不计,并且20 kWh / m后的平均LID劣化2论述于太阳的为1.5%。最终,相对于整个第一年中发生的最初退化,运营第二年的退化率为0.32%。
更新日期:2019-08-06
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