开关柜内部燃弧条件下金属网格吸收器防护效果分析

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关键词：开关柜；短路燃弧；热－力效应；金属网格吸收器；防护效果DO1：10. 15938/j. emc.2025.06.010中图分类号：TM591 文献标志码：A 文章编号：1007-449X（2025）06-0090-11

Protection effect analysis of metal grid absorber due to internal short-circuit arcing in switchgear

LI Peng 1，2 ， YUAN Ye³，LIU Chang4， GAO Yehe1，2， PU Ziheng 1，2 WU Tian1，2， FANG Chunhua1，2

1.Hubei Provincial Engineering Technology Research Center for Power Transmision Line，China Three Gorges University， Yichang 443O02， China;2. Collge of Electrical Engineering and New Energy，China Three Gorges University， Yichang 443002， China；3.State Grid Shiyan Power Supply Company，Shiyan 442000，China； 4.State Grid Handan Power Supply Company，Handan O56O35，China）

Abstract ：For the problem that thermal-pressure effect （the high temperature and pressure）produced by arcing in the switchgear seriously threatens the safety of surounding buildings and staff，a calculation method of arcing thermal-pressure eect based on arc energy heat equivalence was proposed. Meanwhile， in order to reduce the harm of high temperature and high-speed airflow caused by short-circuit arcing process，the protective measures based on metal grid absorber were put forward. According to the action

principle of metal grid absorber，an equivalent mathematical model of metal grid absorber was constructed，and the influence of grid arrangement and placement location on the protection effect was analyzed. The results show thatthe pressure rise obtained by the arc energy heat equivalent method is in good agreement with the tests results，and the error is small.The metal grid absorber can effctively reduce the temperature and velocity of gas in the opening. The protection efect of the metal grid absorber with staggered arrangement is better，and the heat absorption efficiency is about 6，83% ． The protective effect of the metal mesh absorber is better when it is close to the pressure relief opening. The research can provide a reference for the protection design of fault arcs in high-voltage switchgear.

Keywords：switchgear;short-circuit arcing；thermal-pressure effect；metal grid absorber；protection effect

0引言

金属封闭开关柜大量应用于输配电系统，是保障电力系统安全稳定运行的重要设备之一[1-2]。（剩余14144字）