磁流体仿真与正交试验融合设计的灭弧室性能优化方法

doi:10.19595/j.cnki.1000-6753.tces.220518

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Abstract The arc generated during the breaking process of low-voltage circuit breakers is an important factor affecting its short-circuit performance. The key to improve the quality of the low- voltage circuit breaker is to study and optimize its arc extinguishing performance. In the paper, a new method of arc extinguishing performance optimization based on the fusion design of MHD simulation and orthogonal experiment is proposed. Firstly, the simulation model of arc extinguishing chamber is established, and several factors such as the shape of arc runner, the number of arc extinguishing grids, transverse magnetic field and arc extinguishing chamber pressure are adjusted to obtain the optimal factor combination and variable range. Secondly, the prototype of arc extinguishing chamber and multi-dimensional arc data measurement system is designed to fuse arc image and electrical signal data to reproduce the whole process of arc movement. Thirdly, according to the prototype and simulation model, four-factor three-level and four-factor four-level orthogonal tests are designed respectively. After the integration of the prototype experiment and simulation calculation, the order of the influence of five factors on arc extinguishing performance is obtained as follows: arc extinguishing chamber pressure, transverse magnetic field, arc runner shape, arc extinguishing grid and contact material. It is concluded that the arc transfer time can be reduced by increasing the pressure of arc extinguishing chamber, transverse magnetic field, arc runner radian and the proportion of contact material Agcd. When the grid is 7 pieces, the effect of arc transfer is the best.

Key words： Arc extinguishing chamber arc simulation arc extinguishing performance orthogonal experiment

Received: 06 April 2022

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TM572.2

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	Zhao Jie
	You Yingmin
	Shu Liang
	Wang Jingqin
	Zhang Yanping

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Zhao Jie,You Yingmin,Shu Liang等. The Performance Optimization of Arc Extinguishing Chamber Based on the Integration Analysis Magnetic Fluid Simulation and Orthogonal Test[J]. Transactions of China Electrotechnical Society, 2022, 37(20): 5347-5358.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.220518 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I20/5347

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