Grounding Fault Direction Algorithm Using Zero-sequence Current in Resonant Grounding System

Xin JIN; Yongduan XUE; Zhenhua PENG; Fan YANG; Bingyin XU

doi:10.7500/AEPS20190319001

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Grounding Fault Direction Algorithm Using Zero-sequence Current in Resonant Grounding System

Application Research | 更新时间：2025-06-16

- Grounding Fault Direction Algorithm Using Zero-sequence Current in Resonant Grounding System
- Automation of Electric Power Systems Vol. 44, Issue 9, Pages: 164-170(2020)
- 作者机构：
  
  1.中国石油大学（华东）新能源学院，山东省青岛市 266580
  2.国网江西省电力有限公司南昌供电分公司，江西省南昌市 330000
  3.国网湖北省电力有限公司电力科学研究院，湖北省武汉市 430077
  4.山东科汇电力自动化股份有限公司，山东省淄博市 255087
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China
- DOI：10.7500/AEPS20190319001
  CLC：
- Received：19 March 2019，
  
  Revised：2019-09-06，
  
  Published Online：01 April 2020，
  
  Published：10 May 2020
- 稿件说明：
移动端阅览
金鑫,薛永端,彭振华等.仅利用零序电流的谐振接地系统接地故障方向算法[J].电力系统自动化,2020,44(9):164-170.

JIN Xin,XUE Yongduan,PENG Zhenhua,et al.Grounding Fault Direction Algorithm Using Zero-sequence Current in Resonant Grounding System[J].Automation of Electric Power Systems,2020,44(9):164-170.
金鑫,薛永端,彭振华等.仅利用零序电流的谐振接地系统接地故障方向算法[J].电力系统自动化,2020,44(9):164-170. DOI： 10.7500/AEPS20190319001.

JIN Xin,XUE Yongduan,PENG Zhenhua,et al.Grounding Fault Direction Algorithm Using Zero-sequence Current in Resonant Grounding System[J].Automation of Electric Power Systems,2020,44(9):164-170. DOI： 10.7500/AEPS20190319001.

摘要

由于多数终端难以获得零序电压或三相电压信号，限制了暂态功率方向法在小电流接地故障定位、多级保护、分界技术的应用。分析了谐振接地系统单相接地时故障点上游与下游的零序电流工频分量、暂态主谐振分量以及衰减直流分量与故障初相角的关系，发现可利用零序电流工频分量作为零序电压的极化相量，进一步识别故障方向。当零序电流工频分量初相位分别在(－45°

75°)或(135°

255°)以内，暂态主谐振分量初相位分别在(－30°

30°)或(150°

210°)以内时

或者衰减直流分量与工频分量幅值之比大于预设门槛时，故障方向为正，否则故障方向为负。仿真和现场实际故障数据验证了算法的正确性。

Abstract

Most distribution terminals are difficult to obtain zero-sequence voltage or three-phase voltage signals. So the application of transient power direction method in fault location

multi-level protection and demarcation of single-phase grounding fault in resonant grounding system is limited. The relationship of the initial phase angle with different components of zero-sequence current of fault points on upstream and downstream

with single-phase grounding fault in resonant grounding system

is analyzed. The components could be power frequency component

transient main resonance component or decaying DC component. It is found that the power frequency component of zero-sequence current can be used as the polarization phasor of the zero-sequence voltage

to further identify the fault direction using zero-sequence current only. The fault direction is positive

when the phase of power frequency component is within (-45°

75°) and the phase of transient main resonant component is within (-30°

30°)

or the phase of power frequency component is within (135°

255°) and the phase of transient main resonant component is within (150°

210°)

or the ratio of the amplitudes of decaying DC component to power frequency component is greater than the preset threshold. Otherwise

the fault direction is opposite. Both the simulation and the field fault data verify the correctness of the proposed method.

关键词

Keywords

references

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