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): 83-89.

• • 上一篇    下一篇

考虑单相触竹阻抗特性的故障选相方法研究

李海宇1, 孙章1, 宋潇潇1, 宁鑫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:2025-04-16 修回日期:2025-05-21 出版日期:2026-04-15 发布日期:2026-04-15
  • 作者简介:李海宇，西华大学电气与电子信息学院硕士研究生，主要从事单相接地故障消弧方面的研究，四川省成都市郫都区西华大学，610039。
  • 基金资助:
    四川省自然科学基金资助项目（2022NSFSC0025）

Research on fault phase selection method considering impedance characteristics of single phase bamboo contact

Li Haiyu1, Sun Zhang1, Song Xiaoxiao1, Ning Xin2   

  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:2025-04-16 Revised:2025-05-21 Online:2026-04-15 Published:2026-04-15

摘要： 针对柔性接地配电网系统发生单相触竹故障进而引发山火的问题，提出一种考虑单相触竹阻抗特性的故障选相方法。首先，搭建10 kV单相触竹故障试验平台，系统分析了竹子引燃特性和故障演变规律，以及引燃阈值与泄漏电流、过渡电阻等参数的关联性，揭示了传统选相流程中因空窗期问题引发山火的机理；然后，基于构建的柔性接地配电网模型，引入主动选相触发机制，通过持续注入特征电流并监测特征变化量的方式，大幅提高保护耐过渡电阻能力，优化了选相流程，实现了触发即选相的快速响应功能，解决了选相流程中存在的空窗期问题；最后，仿真分析和现场试验表明，所提方法有效降低了单相触竹故障引发山火的风险。

关键词: 柔性接地设备, 阻抗, 单相触竹, 主动选相

Abstract: A fault phase selection method considering the impedance characteristics of single-phase contact bamboo is proposed to solve the problem of mountain fire caused by single-phase contact bamboo fault in flexible grounding distribution network. Firstly, a 10 kV single-phase bamboo fault test platform was built, and the ignition characteristics and fault evolution rules of bamboo were systematically analyzed, as well as the correlation between ignition threshold and leakage current, transition resistance and other parameters, revealing the mechanism of mountain fire caused by dead time in the traditional phase selection process; Then, based on the constructed flexible grounding distribution network model, the active phase selection trigger mechanism is introduced to significantly improve the ability of the protection to withstand the transition resistance by continuously injecting the characteristic current and monitoring the characteristic variation; Furthermore, the phase selection process is optimized, the quick response function of trigger phase selection is realized, and the problem of dead time in the phase selection process is solved; Finally, simulation analysis and field tests show that the proposed method effectively reduces the risk of mountain fire caused by single-phase bamboo contact fault.

Key words: flexible grounding device, impedance, single phase bamboo contact, active phase selection