Pressure Rise Calculation and Pressure Relief Efficiency Analysis in the Cable Room of Switchgear Due to Internal Short-circuit Explosion

doi:10.13296/j.1001-1609.hva.2020.10.007

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Pressure Rise Calculation and Pressure Relief Efficiency Analysis in the Cable Room of Switchgear Due to Internal Short-circuit Explosion

更新时间：2025-04-26

- Pressure Rise Calculation and Pressure Relief Efficiency Analysis in the Cable Room of Switchgear Due to Internal Short-circuit Explosion
- High VoltageApparatus Vol. 56, Issue 10, Pages: 34-40(2020)
- 作者机构：
  
  1. 三峡大学电气与新能源学院
  2. 湖北省输电线路工程技术研究中心(三峡大学)
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.10.007
  CLC： TM591
- Published：2020
- 稿件说明：
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[1]黎子晋,方蓓贝,黎鹏,肖盼,吴田,普子恒.开关柜电缆室内部短路爆炸压力升计算及泄压效率分析[J].高压电器,2020,56(10):34-40.

Pressure Rise Calculation and Pressure Relief Efficiency Analysis in the Cable Room of Switchgear Due to Internal Short-circuit Explosion[J]. High voltageapparatus, 2020, 56(10): 34-40.
[1]黎子晋,方蓓贝,黎鹏,肖盼,吴田,普子恒.开关柜电缆室内部短路爆炸压力升计算及泄压效率分析[J].高压电器,2020,56(10):34-40. DOI： 10.13296/j.1001-1609.hva.2020.10.007.

Pressure Rise Calculation and Pressure Relief Efficiency Analysis in the Cable Room of Switchgear Due to Internal Short-circuit Explosion[J]. High voltageapparatus, 2020, 56(10): 34-40. DOI： 10.13296/j.1001-1609.hva.2020.10.007.

摘要

开展了开关柜电缆室内部三相短路爆炸试验

获得了电弧功率的变化规律;基于瞬态动力学分析

计算得到了泄压盖的开启压力、开启时刻和柜门的耐压强度;对泄压盖封闭和开启条件下隔室内部的压力升进行了计算

分析了泄压盖不同开启角度下泄压通道的泄压效率

给出了泄压盖的安全开启角度。结果表明:随着燃弧时间的增加

隔室内部的压力升逐渐增大

而各位置压力升的差异逐渐减小;泄压通道的泄压效率随开启角度的增加而增大

当开启角度达到30°时

对应的泄压效率为21%

此时可确保隔室的安全。

Abstract

The three-phase short-circuit explosion experiment in the switchgear cable room is carried out

and the the change of arc power is obtained. Based on the transient dynamics analysis

the opening force and opening time of the pressure relief cover

and the ability of the door to withstand the overpressure are calculated. Under the condition of the pressure relief cover is close and open

the pressure rise distribution in the cable room is calculated.The pressure relief efficiencies of the pressure relief channel are analyzed when the pressure relief cover is opened with different angles

and the safety open angles of the pressure relief cover is gotten. The results indicate that the pressure rise is increased with the increase of arcing time

but the difference the pressure rise in different positions of the room gradually decreases. The pressure relief efficiencies of the pressure relief channel are increased with the increase of opening angles

and the pressure relief efficiency is 21% when the opening angle reaches 30°

which can ensure the safety of the room.

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