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基于高斯过程的光伏阵列故障定位

, PP. 249-256

Keywords: 光伏阵列,光伏组件,故障定位,高斯过程

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Abstract:

光伏阵列由大量串联和并联的光伏组件组成,使得在某一(些)光伏组件出现故障时,对故障点的精准定位较难,针对此问题,本文提出了基于高斯过程回归机制的光伏阵列故障定位方法。首先,采用二进制码表示光伏阵列工作状态,将各二进制码转换为整数,构建了基于整数回归的故障定位模型;然后,采用高斯过程对转换后的光伏阵列工作状态进行拟合;最后,根据当前光伏阵列输出电压、电流等信号,实现对故障诊断和故障点定位。将所提算法应用于2#x000d7;4光伏阵列系统,分别针对一个、两个、三个、四个光伏组件出现故障,以及前三种组合状态的情况进行实验,并与常用BP神经网络故障定位方法进行比较。从实验结果可以看出本文所提故障定位方法优于BP神经网络;高斯过程对一个、两个及三个光伏组件出现故障的情况能够进行很好的定位,但是对四个组件同时出现故障的情况存在一定的定位误差。

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