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Indexed by:会议论文

Date of Publication:2017-01-01

Included Journals:CPCI-S

Volume:2017-December

Page Number:934-938

Key Words:multi-field coupling; HVDC circuit breaker; highspeed mechanical switch; repulsion mechanism; opening rebound

Abstract:High-speed mechanical switch is the important device of high-voltage direct current(HVDC) circuit breaker. In the paper, a high-speed vacuum mechanical switch composed of the bistable spring retaining device and electro-magnetic repulsion mechanism is proposed. The simulation model of high-speed mechanical switch is established. The simulation analysis of multi-field coupling including electro-magnetic field, temperature field and motion field is carried out. The influence factors of the dynamic characteristics of high-speed mechanical switch and the characteristics of temperature distribution in repulsion coil are obtained. Then the influence of coil turns on the opening rebound of high-speed mechanical switch is analyzed and discussed. The optimal parameters of high-speed mechanical switch are determined by Multi-field coupling analysis The results show that the high-speed mechanical switch designed in this paper can reach the rated insulated opening distance of 20mm in 1.8ms.