This article presents an initial performance analysis of a database of photovoltaic (PV) system performance time series collected within the European funded COST Action PEARL PV. The database contains monitoring data of over 8400 PV systems with accompanying metadata. The PV plants are small residential systems, primarily installed in Europe, with a high density in Belgium. In this initial study, the annual average performance ratio, the annual energy yield, and the performance loss rate of the systems are determined and evaluated. The systems have an average lifetime of 30.5 months. The annual mean performance ratio across all systems is 76.7% and the average yield is 954.9 kWh/kWp per year. The performance loss rate is calculated using three different statistical approaches and one irradiance data source. Average performance losses between −0.74%/year and −0.86%/year are calculated depending on the used approach. Furthermore, certain weather-dependent correlations are detected, such as decreasing performance ratio and increasing yield values with increasing irradiation. This study is a stepping-stone for further populating the present database, lessons learnt for handling large amounts of PV performance data, and carrying out performance studies of PV system fleets installed across Europe.

中文翻译：

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大型光伏系统的性能分析和退化


本文介绍了欧洲资助的 COST Action PEARL PV 中收集的光伏 (PV) 系统性能时间序列数据库的初步性能分析。该数据库包含 8400 多个光伏系统的监测数据以及随附的元数据。光伏电站是小型住宅系统，主要安装在欧洲，在比利时安装密度较高。在这项初步研究中，确定并评估了系统的年平均性能比、年发电量和性能损失率。该系统的平均寿命为 30.5 个月。所有系统的年平均性能比为 76.7%，平均发电量为每年 954.9 kWh/kWp。性能损失率是使用三种不同的统计方法和一种辐照度数据源计算的。根据所使用的方法计算 -0.74%/年至 -0.86%/年之间的平均性能损失。此外，还检测到某些与天气相关的相关性，例如随着辐照度的增加，性能比降低，产量值增加。这项研究是进一步充实现有数据库、处理大量光伏性能数据的经验教训以及对欧洲各地安装的光伏系统群进行性能研究的基石。