配电网短路故障模式分析

PATTERN ANALYSIS OF SHORT CIRCUIT FOR TREE TYPE DISTRIBUTION LINE

由于实际的检测准确度有限，基于精确模型建立的诊断方法用于实际线路时，可能诊断出若干个故障点，其中一个为真故障，其余为伪故障，所以，区分真伪故障是能否成功地进行故障定位的关键。在大量仿真的基础上，总结出配电网短路故障模式的特征，对含有一定误差的测试数据，只要进行优化处理和特征识别，就可以将真故障点分离出来。

In this paper, the effect of phase measuring error on short circuit fault resistance of tree type distribution line is investigated, their relations are found. According to the relationship, after the feature selection, we can distinguish the real one from the false faults when the measuring errors are in existence.