阻性负载下低压故障电弧特性分析

Characteristic analysis of low-voltage arc fault in resistive load conditions

通过搭建串联电弧检测试验平台，在不同功率的阻性负载下，采集正常和发生串联故障电弧状态下的线路电流，并分析了电流的时域特征和频域特征，包括零休时间、电流上升率、平均值、有效值以及各奇次、偶次谐波因数等。 分析结果表明，选择 2~6 次谐波因数及其变化率作为串联故障电弧的判据较为合理。

A test platform of series arc faults is constructed and the line current is acquired in normal and series arc fault conditions for different resistive load powers. The time- and frequency-domain characteristics of the line currents acquired are analyzed,including rising rate, average,RMS,arc interval,odd/even harmonic factors and so on. The analytical results show that,the 2 to 6-order harmonic factors and their variation rates should be selected as the criteria of series arc fault detection.