一种光伏阵列实时状态监测与故障定位系统

A real-time status monitoring and fault location system for photovoltaic arrays

开发一种光伏阵列状态监测和故障定位系统,该系统将连续采集、间歇采集、自动定时采集、故障检测定位等功能集成到统一的Matlab平台.提出一种"阈值法-Hampel辨识法"相结合的光伏阵列离群值检测算法,该算法通过比较不同光伏组串瞬时电流进行异常检测实现故障定位.基于实验室光伏并网发电平台上的故障模拟,重点研究了线线故障和失配故障条件下的故障检测与定位.实验结果表明:该系统能够自动定时采集光伏电气特性数据并快速、准确地判断是否发生故障及实现故障组串定位,具有良好的应用前景.

A PV array real-time status monitoring and fault location system is developed in this paper.The system integrates continuous acquisition,intermittent acquisition,automatic timing acquisition,fault detection and location and other functions into a unified Matlab platform.This paper puts forward a hybrid fault detection and location algorithm that is called“threshold-Hampel identification”method which is suitable to detect the abnormal data.The algorithm realizes the fault location by comparing the instantaneous current of different PV strings.Moreover,based on the fault simulation on a laboratory PV grid-connected power generation platform,the fault detection and location under line-line fault and mismatch fault conditions are studied.Experimental result shows that the developed system can automatically acquire the PV electrical data,quickly and accurately detect and locate faulty strings,which has a good application prospect.