基于零序电流的单相接地故障定位系统

基于对称分量法对配电网输电线路发生不对称接地故障时零序分量进行分析,提出基于零序电流的配电网故障定位方法.基于零序电流的故障定位方法适用于中性点不接地系统发生单相接地故障时的故障定位,阐述零序分量的原理与特点,介绍零序电流采集系统的基本构成及对于零序电流的滤波放大处理方法,分析零序电流相位的提取与计算,最后总结了零序分量在相位法故障定位的特点及应用前景.

Based on Zero Sequence Current of Single Phase Grounding Fault Location System

This paper is based on the symmetrical component method to analyze the zero sequence component of distribution network transmission line having asymmetrical earth fault.It is proposed that fault location method based on zero-sequence current distribution network.Fault location method based zero-sequence current apply to fault location of neutral point ungrounded system occurring single-phase ground fault.The paper explains the principle and characteristics of the zero sequence components,and introduces the basic components of the zero-sequence current acquisition system and approach for the zero-sequence current filtered and amplified,and analysis the extract and calculation of the zero-sequence current phase.Finally it is summarized that the characteristics of the zero sequence component in the phase method of fault location and application prospects.