主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2026, Vol. 45 ›› Issue (4): 76-82.

• • 上一篇    下一篇

10 kV配电网单相触树引燃的泄漏电流时域模型

陈瑾雯1, 孙章1, 宁鑫2, 张华2   

  1. （1.西华大学 电气与电子信息学院，四川 成都 610039； 2.国网四川省电力公司电力科学研究院，四川 成都 610041）
  • 收稿日期:2025-01-14 修回日期:2025-03-10 出版日期:2026-04-15 发布日期:2026-04-15
  • 作者简介:陈瑾雯，西华大学电气与电子信息学院硕士研究生，主要从事输配电山火风险评估技术方面的研究，四川省成都市郫都区，610039。
  • 基金资助:
    四川省自然科学基金资助项目（2022NSFSC0025）

Time-domain modelling of leakage currents for single-phase touch-tree ignition in 10 kV distribution networks

Chen Jinwen1, Sun Zhang1, Ning Xin2, Zhang Hua2   

  1. (1. School of Electrical and Electronic Information, Xihua University, Chengdu Sichuan 610039, China; 2. Research Institute of Electric Power Science, State Grid Sichuan Electric Power Company, Chengdu Sichuan 610041, China)
  • Received:2025-01-14 Revised:2025-03-10 Online:2026-04-15 Published:2026-04-15

摘要： 配电线路单相触树接地故障（TSF）容易引发山火，危害电力系统安全运行。本文针对TSF现场数据不足，泄漏电流电气特征微弱，专有模型研究较少的问题，搭建了10 kV配电网TSF真型试验平台，通过对TSF现象、植被温度、泄漏电流和等效电阻值等数据的分析，深入探究其引燃机制。并聚焦TSF明火飘动前的热量累积阶段，建立了综合考虑植被尺寸、含水率及环境温度的泄漏电流时域模型。经过试验验证，泄漏电流有效值仿真与实测波形相关系数R2平均值达0.972 6。最后通过改变初始试验条件（植被尺寸、含水率及环境温度）和模型对比分析进一步验证了所建模型的鲁棒性和精确性。研究成果为TSF早期故障识别奠定了基础，对提升山火防控能力具备重要应用价值。

关键词: 单相触树接地故障, 泄漏电流, 时域模型, 山火防控

Abstract: Tree-contact Single-phase-to-ground Fault (TSF) in distribution lines is prone to cause wildfire, which jeopardizes the safe operation of power systems. Aiming at the problems of insufficient field data of TSF, weak electrical characteristics of leakage current, and less proprietary model research, this paper builds a true-type test platform of TSF in 10 kV distribution network, and explores its ignition mechanism by analyzing the data of TSF phenomenon, vegetation temperature, leakage current and equivalent resistance value. Focusing on the heat accumulation phase before the TSF open fire drifting, a time-domain model of leakage current integrating vegetation size, moisture content and ambient temperature was developed. The correlation coefficient R2 between the simulated and measured RMS leakage current waveforms is verified to be 0.972 6, and the robustness and accuracy of the model is further verified by changing the initial test conditions (vegetation size, water content, and ambient temperature) and comparative analysis of the model. The research results lay a foundation for early failure identification of TSF, which is of great value for improving the prevention and control of wildfire.

Key words: Tree-contact Single-phase-to-ground Fault, leakage current, time domain model, forest fire prevention and control