Research on Composite Magnetic Field Contact of DC Vacuum Circuit Breaker and Its Arc Behavior

2019 5th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST) Pub Date : 2019-10-01 DOI:10.1109/ICEPE-ST.2019.8928845

Miaozhong Cai, Ziying Zhang, J. Zou, Zhihui Huang, Ruitong Liu

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引用次数: 1

Abstract

A composite magnetic field contact dedicated to DC vacuum circuit breaker is designed. Magnetic field simulation and DC breaking experiments were completed for this type of contact. The breaking current amplitude is 5 1kA, the commutation frequency is 3000 Hz, and the arc image is taken by high speed photography. The simulation analyzes Magnetic field distribution of composite magnetic field contacts and the Lorentz force of the arc on the contact surface. The trend of the arc is predicted. Experimental results show, under the condition of DC low current medium frequency breaking, the AMF-TMF contact can effectively drive the arc rotation. However, the rotation effect is not obvious. And the arc can move to the Axial Magnetic Field contact under the influence of the magnetic blowing force. The arc maintains the diffusion state after the contact reaches a certain opening distance, then it is extinguished when the current crosses zero. This kind of contact meets the demand of DC low current breaking.

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直流真空断路器复合磁场触头及其电弧行为研究

设计了一种专用于直流真空断路器的复合磁场触头。对该触点进行了磁场模拟和直流分断实验。分断电流幅值为5 1kA，换相频率为3000 Hz，采用高速摄影法拍摄电弧图像。仿真分析了复合磁场触点的磁场分布及触点表面电弧的洛伦兹力。预测了弧线的走向。实验结果表明，在直流小电流中频分断条件下，AMF-TMF触点能有效地驱动电弧旋转。然而，旋转效应并不明显。在磁吹力的作用下，电弧可向轴向磁场接触方向移动。电弧在触点达到一定开断距离后保持扩散状态，当电流过零时熄灭。这种触点可以满足直流小电流分断的要求。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2019 5th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST)

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