Time-varying characteristic analysis and parameter influence of transition resistance of tree-contact single-phase-to-ground fault

Ning Xin; Zhang Hua; Shang Hao; Ning Wenjun

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Time-varying characteristic analysis and parameter influence of transition resistance of tree-contact single-phase-to-ground fault

更新时间：2025-10-22

- Time-varying characteristic analysis and parameter influence of transition resistance of tree-contact single-phase-to-ground fault
- Vol. 62, Issue 10, (2025)
- 作者机构：
  
  1. 国网四川省电力公司电力科学研究院
  2. 四川大学电气工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2025
- 稿件说明：
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Ning Xin, Zhang Hua, Shang Hao, et al. Time-varying characteristic analysis and parameter influence of transition resistance of tree-contact single-phase-to-ground fault[J]. 2025, 62(10).
DOI：

Ning Xin, Zhang Hua, Shang Hao, et al. Time-varying characteristic analysis and parameter influence of transition resistance of tree-contact single-phase-to-ground fault[J]. 2025, 62(10). DOI：

摘要

导线触树单相接地故障（tree-contact single-phase-to-ground fault，TSF）可能点燃树木造成火灾，威胁群众生命财产安全。但TSF故障特征微弱，难以辨识，亟待深入研究其故障机理及特征。文章基于10 kV模拟线路实验平台，构造TSF进行研究。实验结果表明，TSF发展过程可以大致分为4个阶段，各阶段故障点电流波形存在不同特征，TSF的过渡电阻随故障发展逐渐减小，过渡电阻的变化率也随故障发展逐渐减小。树枝的长度、粗细和种类对TSF过渡电阻的大小和变化率均有影响。

Abstract

Tree-contact single-phase-to-ground fault (TSF) may ignite trees and cause fire

threatening the life and property of people. However

the fault characteristics of TSF are weak and difficult to identify

so it is urgent to further study the fault mechanism and characteristics. In this paper

TSF is constructed based on 10 kV analog circuit experiment platform. The experimental results show that the development process of TSF can be roughly divided into four stages. Fault point current waveform has different characteristics in different stages. The transition resistance and the changing rate of transition resistance of TSF gradually decreases with the development of fault. The length

thickness and species of the tree are all able to affect the magnitude and the changing rate of the transition resistance of TSF.

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