Influence of Electrode Erosion on Air Fault Arc in a Closed Container

YUAN Duanlei; WANG Haiyan; YANG Fang; ZHU Zhihao; FEI Xiang; LI Mei; WU Yi

doi:10.13296/j.1001-1609.hva.2018.09.007

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Influence of Electrode Erosion on Air Fault Arc in a Closed Container

更新时间：2025-04-26

- Influence of Electrode Erosion on Air Fault Arc in a Closed Container
- High VoltageApparatus Vol. 54, Issue 9, Pages: 38-42(2018)
- 作者机构：
  
  1. 平高集团有限公司
  2. 西安交通大学
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.09.007
  CLC： TM501.2
- Published：2018
- 稿件说明：
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[1]袁端磊,王海燕,杨芳,朱志豪,费翔,李美,吴翊.电极烧蚀对密闭容器内空气故障电弧的影响[J].高压电器,2018,54(09):38-42.

YUAN Duanlei, WANG Haiyan, YANG Fang, et al. Influence of Electrode Erosion on Air Fault Arc in a Closed Container[J]. High voltageapparatus, 2018, 54(9): 38-42.
[1]袁端磊,王海燕,杨芳,朱志豪,费翔,李美,吴翊.电极烧蚀对密闭容器内空气故障电弧的影响[J].高压电器,2018,54(09):38-42. DOI： 10.13296/j.1001-1609.hva.2018.09.007.

YUAN Duanlei, WANG Haiyan, YANG Fang, et al. Influence of Electrode Erosion on Air Fault Arc in a Closed Container[J]. High voltageapparatus, 2018, 54(9): 38-42. DOI： 10.13296/j.1001-1609.hva.2018.09.007.

摘要

文中基于磁流体动力学理论（MHD）建立了密闭容器内空气故障电弧的二维数学模型

研究了铜电极烧蚀金属蒸汽对故障电弧的影响。在充分考虑由电极烧蚀引起的熔化、蒸发及化学反应等不同能量传递过程的基础上

通过求解质量、动量、能量、电磁场守恒方程以及金属蒸汽浓度方程描述故障电弧内部的流体动力学和电磁场耦合过程。计算获得了电弧等离子体的温度

压力和铜蒸汽浓度分布。比较分析了考虑和不考虑电极烧蚀情况下的计算结果

研究表明电极烧蚀铜蒸汽对压力上升的影响很小

这主要归因于内部能量平衡的变化。此外

电弧电压对铜蒸汽的存在也不敏感。压力上升、电极烧蚀质量和电弧电压的仿真结果和实验结果相一致

验证了故障电弧仿真模型的有效性。

Abstract

A two-dimensional model for fault arc in a closed chamber is developed based on magnetic-hydrodynamictheory to investigate the effect of metal vapour eroded from copper electrodes on fault arc. Different energy transfermechanisms including melting

evaporation and chemical reaction due to metal vaporization are taken into account.By solving the conservation equations for mass

momentum

energy

electromagnetic field and mass fraction of cop-per vapour

the coupling effect between the gas hydrodynamic and electromagnetic field is described. The distribu-tions of temperature

pressure and mass fraction of copper vapour are simulated. Comparisons are made between thecalculation results with and without electrode erosion. Results show that the copper vapour eroded from electrodeshas little influence on pressure rise

which mainly attributes to the change of internal energy balance. In addition

the arc voltage is also not sensitive to the presence of copper vapour. The simulated pressure rise

electrode erosionmass and arc voltage agree with the experimental results

which proves that validity of the numerical model.

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