检测暂态零模电流相关性的小电流接地故障定位方法

MA Shicong; XU Bingyin; GAO Houlei; XUE Yongduan; WANG Jinghua

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检测暂态零模电流相关性的小电流接地故障定位方法

更新时间：2025-08-13

- 检测暂态零模电流相关性的小电流接地故障定位方法
- Automation of Electric Power Systems Vol. 32, Issue 7, Pages: 48-52(2008)
- 作者机构：
  
  1. 山东大学电气工程学院,山东省,济南市,250061
  2. 山东理工大学电气技术研究所,山东省,淄博市,255049
  3. 山东科汇电气股份有限公司,山东省,淄博市,255087
- 作者简介：
- 基金信息：
- DOI：
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- Published：2008
- 稿件说明：
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MA Shicong, XU Bingyin, GAO Houlei, et al. [J]. Automation of electric power systems, 2008, 32(7): 48-52.
DOI：

MA Shicong, XU Bingyin, GAO Houlei, et al. [J]. Automation of electric power systems, 2008, 32(7): 48-52. DOI：

摘要

提出了一种利用暂态零模电流的馈线自动化系统小电流接地故障定位新原理:故障点前非故障区段两侧馈线终端装置（FTU）检测到的暂态零模电流波形相似，相关系数接近1;故障区段两侧FTU检测到的暂态零模电流初始极性相反，波形差异很大，相关系数接近0。通过求取相关系数最大值，避免FTU数据采集不同步引起的计算误差。数字仿真与静态模拟实验证明了所提出的故障定位方法是正确、可行的。

Abstract

A new fault locating method based on the transient zero mode currents is proposed to locate the single phase grounding fault in the feeder automation system. The waveforms of transient zero mode currents at both ends of a non-faulty section gathered by feeder terminal unit（FTU） are similar， with a correlation coefficient close to one. On the contrary， the correlation coefficient is nearly zero for the currents at both ends of a faulty section. By calculating the maximum correlation coefficient in faulty cases， the calculation errors resulted from asynchronous sampling of FTUs can be avoided. The results of ATP simulation and static simulation have proved the accuracy and feasibility of the new method.

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