配电网接地故障特征及其诊断定位方法

快速、准确的故障定位是迅速隔离故障和恢复供电的前提,对于维护配电网的安全运行具有重要意义,而配电网的单相接地故障定位长期以来是难以解决的课题.本文通过对国内外关于各种研究情况做了全面深入地分析,在此基础上从接地故障测距算法和在线监测两方面进行了研究,并且针对基于对配电网发生单相接地故障后的故障主要特征的分析,提出了相应的接地故障定位系统以及硬件总体设计,对于提高供电配电网具有重要的研究意义和实用价值.

The Line-to-Ground Fault and Fault Location Analysis in Distribution Networks

Quick and accurate fault location is the premise to rapidly isolate the fault and redelivery power supply which is important to the normal working of power networks.Line-to-ground fault location maintains unresolved to power distribution networks for a long time.After a comprehensive analysis of existing methods,the paper made a thorough study with the on-line monitoring method and a fault location algorithm.This paper based on the main fault character analysis of single line-to-ground fault in distribution networks,the location algorithm by injecting current are proposed for diagnosing and locating faults.