Calculation and Optimization of the Unbalanced Magnetic Field in Multi-break VCBs

GE Guowei; CHENG Xian; ZHANG Penghao; LIAO Minfu; LU Gang

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Calculation and Optimization of the Unbalanced Magnetic Field in Multi-break VCBs

更新时间：2025-12-08

- Calculation and Optimization of the Unbalanced Magnetic Field in Multi-break VCBs
- Vol. 45, Issue 5, Pages: 1535-1541(2019)
- 作者机构：
  
  1. 郑州大学电气工程学院
  2. 2. 河南省输配电装备与电气绝缘工程技术研究中心
  3. 大连理工大学电气工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：30 May 2019，
  
  Published：2019
- 稿件说明：
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GE Guowei, CHENG Xian, ZHANG Penghao, et al. Calculation and Optimization of the Unbalanced Magnetic Field in Multi-break VCBs[J]. 2019, 45(5): 1535-1541.
DOI：

GE Guowei, CHENG Xian, ZHANG Penghao, et al. Calculation and Optimization of the Unbalanced Magnetic Field in Multi-break VCBs[J]. 2019, 45(5): 1535-1541. DOI：

摘要

为研究多断口真空开关不平衡磁场分布及影响

首先引入了多断口真空开关磁偏弧的概念

并分析多断口真空开关串联电弧及连接部分对各个断口磁场分布的影响

使其失去对称性

存在不平衡磁场。然后建立了不同布置方式下的双断口真空开关磁场模型

得到了不同布置方式情况下的磁场分布。最后通过双断口真空开关磁场数据与单个真空开关的磁场数据进行矢量计算

得到了双断口真空开关连接布置方式及串联电弧间相互影响引起的不平衡磁场的影响规律。仿真结果表明在双断口真空开关不同布置、不同距离情况下

在电流为10 kA时

不平衡磁感应强度<30 mT

随着距离的增加

不平衡磁感应强度减小

并可知铜屏蔽罩外围进行导磁材料涂层可以有效抑制不平衡磁场。该研究得到了多断口真空开关不平衡磁场的分布及优化措施

为多断口真空开关布置方式及紧凑型优化设计提供了参考依据。

Abstract

In order to investigate the distribution and influence of the unbalanced magnetic field（BMF） in multi-break VCBs

the concept of the magnetic arc blow in multi-break VCBs is firstly proposed and the magnetic arc blow is caused by unbalanced magnetic field which is produced by the interaction between each breaks and the connection bus is analyzed. The magnetic field model of the double-break VCBs in different configurations is established. The magnetic field distribution is calculated by the Ansoft Maxwell. Based on the simulation data of the magnetic field in double-break and single-break VCBs

the vector calculation is used to calculate the unbalanced magnetic field. The laws of the unbalanced magnetic field influenced by the configuration and vacuum arcs are obtained. The simulation results indicate that the BMF of the double-break VCBs is below 30 mT with different configuration and distance when the main current is 10 kA.The BMF decreases as the distance of the vacuum interrupters in double-break VCBs. The magnetic field shield

which is achieved by smearing the magnetic material on the copper shield

is proposed to restrain the BMF in double-break VCBs.The BMF and optimal method is obtained which is useful to the configuration and optimization design of the multi-break VCBs from the aspect of the magnetic field distribution.

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