[1]李 靜,杜志鵬,曹雲東,等.縱向磁場對真空電弧微觀特性影響的研究[J].高壓電器,2019,55(07):63-69.[doi:10.13296/j.1001-1609.hva.2019.07.010]
 LI Jing,DU Zhipeng,CAO Yundong,et al.Study on the Influence of Axial Magnetic Field on the Microscopic Characteristics of Vacuum Arc[J].High Voltage Apparatus,2019,55(07):63-69.[doi:10.13296/j.1001-1609.hva.2019.07.010]
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縱向磁場對真空電弧微觀特性影響的研究()
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《高壓電器》[ISSN:1001-1609/CN:61-11271/TM]

卷:
第55卷
期數:
2019年07期
頁碼:
63-69
欄目:
研究與分析
出版日期:
2019-07-15

文章信息/Info

Title:
Study on the Influence of Axial Magnetic Field on the Microscopic Characteristics of Vacuum Arc
作者:
李 靜1 杜志鵬12 曹雲東1 王玲玲3
(1. 沈陽工業大學電氣工程學院, 沈陽 110870; 2. 國網山西省電力公司技能培訓中心(山西電力職業技術學院), 太原 030021; 3. 遼甯省興城市國家電網興城供電分公司, 遼甯 興城 125100)
Author(s):
LI Jing1 DU Zhipeng12 CAO Yundong1 WANG Lingling3
(1. School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China; 2. State Grid Skill Training Center of SEPC(Electric Power Occupational Technical Institute of SEPC), Taiyuan 030021, China; 3. Xingcheng Power Supply Branch of State Grid Liaoning Province Xingcheng City, Liaoning Xingcheng 125100, China)
關鍵詞:
非平衡態真空電弧 縱向磁場 微觀特性參數 氣體動力學方程
Keywords:
non-equilibrium vacuum arc axial magnetic field microscopic characteristics parameter gas dynamic equation
DOI:
10.13296/j.1001-1609.hva.2019.07.010
摘要:
縱向磁場作用下真空電弧等離子體的微觀參數變化趨勢對于真空電弧的發展和能量變化有著重要的意義。文中基于氣體動力學的漂移擴散方程,耦合電場計算的泊松方程,仿真分析了真空電弧在液態金屬橋斷裂之後,極間充滿了大量的Cu金屬蒸氣後,到電弧等離子形成的這段非平衡態過程。考慮了真空電弧等離子體中微觀電子、離子與金屬蒸氣分子間的碰撞、重組及粒子的漂移、擴散等複雜變化情況,建立了縱向磁場影響下非平衡態真空電弧的微觀模型。數值模擬並分析了不同磁場強度對電弧等離子區微觀參數的影響及變化規律。仿真結果表明:隨著縱向磁場的增大,陰極與陽極鞘層的電場強度減小,有利于電弧熄滅;同時電極過程減弱,電子和銅離子的數密度均減小,陽極表面的電子溫度分布均勻且減小,有利于抑制真空電弧能量的提高。
Abstract:
The variation of microscopic parameters of vacuum arc plasma under the action of axial magnetic field is of great significance to the development of vacuum arc and energy change. In this paper, a non-equilibrium state micro model for vacuum arc under the action of the axial magnetic field is established based on the drift-diffusion equation of gas dynamics and Poisson equation of the electric field. The non-equilibrium process of vacuum arc which is from a large number of Cu metal vapor is filled with the fracture of liquid arc bridge to the formation of arc plasma is simulated. Collision and recombination of microelectronics, ion and metal vapor molecules with each other in vacuum arc plasma and other complex changes such as drift and diffusion of particles are also considered here. The laws of the plasma parameters at the function of different magnetic field strength are analyzed. The simulation results show that the electric field strength of cathode and anode sheath decreases with the increase of the axial magnetic field, which is advantageous for quenching the arc meanwhile the electrode process is weakened and the density of the electrons and the copper ions are reduced, and the electron temperature distribution on the anode surface is uniform and reduced, which is helpful to suppress the increase of the vacuum arc energy.

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備注/Memo

備注/Memo:
李 靜(1977—),女,講師,碩士生導師,研究領域爲微觀電器電弧理論及氣體絕緣應用。收稿日期:2018-12-04; 修回日期:2019-02-03 基金項目:國家自然科學基金項目(51407120);遼甯省自然科學基金(20180550280)。 Project Supported by National Natural Science Foundation of China(51407120), Natural Science Foundation of Liaoning Province(20180550280).
更新日期/Last Update: 2019-07-15