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 (5): 34-44.

• • 上一篇    下一篇

110 kV阻燃电缆外护套电弧引燃情况下邻近电缆的损伤风险

普子恒1, 郭讯1, 任志刚2, 王帅2, 郭卫2   

  1. （1.三峡大学 电气与新能源学院，湖北 宜昌 443002； 2.国网北京市电力公司电力科学研究院，北京 100075）
  • 收稿日期:2025-08-13 修回日期:2025-12-15 出版日期:2026-05-15 发布日期:2026-05-15
  • 作者简介:普子恒，三峡大学电气与新能源学院副教授，博士，主要研究方向为电网防灾减灾、输电线路智能运维，湖北省宜昌市西陵区，443002。
  • 基金资助:
    国家电网有限公司总部管理科技项目（520201250016-159-ZN）

The risk of damage to adjacent cables under the condition of arc ignition of the outer sheath of 110 kV flame retardant cable

Pu Ziheng1, Guo Xun1, Ren Zhigang2, Wang Shuai2, Guo Wei2   

  1. (1. College of Electrical Engineering & New Energy, China Three Gorges University, Yichang Hubei 443002, China; 2. Beijing Electric Power Research Institute, State Grid, Beijing 100075, China)
  • Received:2025-08-13 Revised:2025-12-15 Online:2026-05-15 Published:2026-05-15

摘要： 探究高压电缆外护套发生电弧引燃时邻近电缆的损伤风险。首先，搭建高压电缆电弧引燃试验平台，采用110 kV阻燃电缆作为试验材料，选取典型故障电弧工况，开展电弧引燃试验，分析电缆外护套的引燃特性；然后，根据引燃试验数据建立等效火源仿真模型，利用护套燃烧的温升特性进行验证；最后，以典型电缆隧道为例，进行温度分布仿真和邻近电缆损伤风险评估。结果表明，4～10 A典型电弧工况下，火焰最高温度为310～725 ℃，等效火源功率约为128～275 W。故障电弧电流小于8 A时，隧道各层电缆无损伤风险；电弧电流在8 A及以上时，在电弧故障发生30 s后，故障电缆同侧的上层敷设电缆表面温度超过安全限值，存在损伤风险。

关键词: 故障电弧, 引燃特性, 损伤风险, 电缆燃烧

Abstract: This paper explores the damage risk of adjacent cables when arc ignition occurs in the outer sheath of high voltage cables. Firstly, a high-voltage cable arc ignition test platform was built, the 110 kV flame retardant cable was used as the test material. The typical arc fault conditions were selected to carry out the arc ignition test, and the ignition characteristics of the cable outer sheath were analyzed. Then, the equivalent fire source simulation model was established according to the ignition test data, and the temperature rise characteristics of the sheath combustion were verified. Finally, taking a typical cable tunnel as an example, the temperature distribution simulation and the risk assessment of adjacent cable damage were carried out. The results show that the maximum flame temperature under 4~10 A typical arc condition is 310~725 ℃, and the equivalent fire source power is about 128~275 W. When the fault arc current is less than 8 A, there is no risk of damage to the cables in each layer of the tunnel; when the arc current is 8 A and above, the surface temperature of the upper laying cable on the same side of the fault cable exceeds the safety limit 30 s after the arc fault occurs, and there is a risk of damage.

Key words: fault arc, ignition characteristics, damage risk, cable combustion