基于光伏组串I-V特性的并联失配检测

Parallel Mismatch Test Based on PV String's I-V Characteristics

在光伏电站检测中,针对由于现场功率测试误差,导致的并联失配分析结果与实际情况偏差过大的问题,提出了基于组串I-V特性叠加的分析方法,大幅提高了分析的准确性;并将该方法应用于在线监测,在此基础上提出了一种故障判别和并联失配优化的有效方法,提高电站的管理水平。

In theprocess of PV power plant test, to solve the problem of excessive deviation between the parallel mis- matchtest result andthe actual situation, due to the measurement error, this paper proposes an analysis method based on I-V characteristicssuperposition, whichsubstantially improves the accuracy of the analysis. The method above makes it possibleto analyze parallel mismatchonline. And then an effective method of fault identification and parallel mismatch optimization is- proposed, which is helpful to improving the management level of thePV power plant.