Simulation of Vacuum Arc Characteristics at Different Moments Under Power-Frequency Current

被引:0
|
作者
王立军 [1 ]
杨鼎革 [1 ]
贾申利 [1 ]
王流火 [1 ]
史宗谦 [1 ]
机构
[1] State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University
基金
中国国家自然科学基金; 国家教育部博士点专项基金资助;
关键词
vacuum arc characteristics; different moments; axial magnetic fields; simulation;
D O I
暂无
中图分类号
TM501.2 [];
学科分类号
080801 ;
摘要
In this paper,based on the quasi-stationary magneto-hydrodynamic(MHD) model,vacuum arc characteristics are simulated and analyzed at different moments under power-frequency current.For a vacuum arc with sinusoidal current under a uniform axial magnetic field(AMF),simulation results show that at the moment of peak value current,maximal values appear in the ion number density,axial current density,heat flux density,electron temperature,plasma pressure and azimuthal magnetic field.At the same time,the distributions of these parameters along the radial position are mostly nonuniform as compared with those at other moments.In the first 1/4 cycle,the ion number density,axial current density and plasma pressure increase with time,but the growth rate decreases with time.Simulation results are partially compared with experimental results published in other papers.Simulations and experimental results both show that the arc light intensity near the cathode side is stronger than that near the anode side for diffusing vacuum arcs.
引用
收藏
页码:227 / 234
页数:8
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