电缆接地故障火灾数值模拟研究

Numerical Simulation Study of Fire in Cable Grounding Fault

摘要:

由于城市地下电缆空间狭长，防范电力电缆隧道火灾威胁城市电网安全意义重大。针对配电电缆同沟混合敷设的情况下电缆故障起火并引发电网故障，运用火灾动力学模拟工具，探究了电缆隧道狭长受限空间中电缆绝缘层内热源燃烧的火灾动态演变特性。研究结果对预防电缆隧道火灾以及防止火情扩散，保护人民群众的生命财产安全都具有重要的实际意义。

Abstract:

Due to the narrow and elongated space of urban underground cable, preventing fires in power cable tunnels is of great importance for ensuring the safety of urban power grids. In response to the scenario where a cable fault in a mixed-laying configuration within the same trench leads to a fire and triggers grid failure, fire dynamics simulation tools are employed to investigate the dynamic evolution characteristics of fires caused by the combustion of heat sources within the cable insulation layer in the constrained space of cable tunnels. The results has important practical significance for preventing fires in cable tunnels, controlling fire spread and protecting the safety of people's lives and property.