高压直流继电器磁吹系统的建模与设计

doi:10.19595/j.cnki.1000-6753.tces.201092

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Abstract Due to the compact structure of the HVDC relay contact system, it is difficult to use grids or gas producing materials to improve the breaking performance of the contacts. The arc movement speed can be accelerated by the external magnetic field of the magnetic blowing system, which improves the arc extinguishing ability. As a key part of the magnetic blowing system, the permanent magnet has an uneven distribution of external magnetic induction, and its size has a great influence on the size and distribution of the magnetic field, which causes certain difficulties for the design of the magnetic blowing system. In response to this problem, this paper established a 3D finite element model of the magnetic blowing system, focusing on the analysis of the impact of the permanent magnet size on its external magnetic field, and established a relevant mathematical model. It also analyzed the characteristics of the external magnetic field distribution of the permanent magnet, and obtained the relationship between the uniformity of the external magnetic field distribution and the size of the permanent magnet. Finally, combined with the characteristics of the HVDC relay's breaking arc, this paper designed the size, magnetization direction and installation position of the permanent magnet in the magnetic blowing system by considering the force and stagnation time of the arc. It lays a theoretical foundation for improving the contact breaking performance of HVDC relays.

Key words： High voltage direct current (HVCD) relay magnetic blowing system permanent magnet DC arc 3D simulation

Received: 30 August 2020

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TM581

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	Su Weilong
	Xu Zhihong

Cite this article:

Su Weilong,Xu Zhihong. Modeling and Design of Magnetic Blowing System for High Voltage Direct Current Relay[J]. Transactions of China Electrotechnical Society, 2022, 37(6): 1583-1594.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.201092 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I6/1583

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