Research on optimal selection techniques for characteristic gases in early warning of power cable fires

LI Zhaojun; ZHANG Pei; MA Li; ZHAO Zhiyu

doi:10.3969/j.issn.1672-3643.2025.03.007

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Research on optimal selection techniques for characteristic gases in early warning of power cable fires

更新时间：2025-09-24

- Research on optimal selection techniques for characteristic gases in early warning of power cable fires
- Ningxia Electric Power Issue 3, (2025)
- 作者机构：
  
  1. 国网宁夏电力有限公司银川供电公司,宁夏,银川,750011
  2. 国网宁夏电力有限公司电力科学研究院,宁夏,银川,750011
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.1672-3643.2025.03.007
  CLC：
- Published Online：27 June 2025，
  
  Published：2025
- 稿件说明：
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LI Zhaojun, ZHANG Pei, MA Li, et al. Research on optimal selection techniques for characteristic gases in early warning of power cable fires[J]. Ningxia electric power, 2025, (3).
DOI：

LI Zhaojun, ZHANG Pei, MA Li, et al. Research on optimal selection techniques for characteristic gases in early warning of power cable fires[J]. Ningxia electric power, 2025, (3). DOI： 10.3969/j.issn.1672-3643.2025.03.007.

摘要

为了探究电缆过热产生的气体是否可以用于火灾早期预警，搭建了电缆过热故障模拟装置，模拟了工程实际中电力电缆过热故障，收集装置内在不同加热条件下的火灾早期气体，发现电缆表面受热产气是因为发生了挥发以及热解，主要气体种类有苯乙酮、2-苯基异丙醇、异辛醇、苯、α-甲基苯乙烯、5-甲基-2-十一烯、苯甲酸乙基己酯和对苯二甲酸二异辛酯。进一步，本文选择具有阶段代表性的特征气体，采用无监督的聚类算法，证明了异辛醇、苯乙酮和苯可以作为电力电缆火灾早期阶段预警特征气体。

Abstract

To explore whether the gas produced by cable overheating can serve as early indicators of fires

this paper develops a simulation device to replicate overheating faults of power cables under practical engineering conditions.Early-stage fire-related gases are collected under various heating scenarios.The results show that gas generation on cable surfaces is caused by volatilization and thermal decomposition.The main gas components identified include acetophenone

2-phenylisopropanol

isooctanol

benzene

α-methylstyrene

5-methyl-2-undecene

ethylhexyl benzoate

and diisooctyl terephthalate.Furthermore

several stage-representative gases were selected and analyzed using an unsupervised clustering algorithm.The analysis confirms that isooctanol

acetophenone

and benzene can serve as characteristic gases for early-stage warning of power cable fires.

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