气流场驱动下栅片中弧压提升特性的数值分析  

Numerical Analysis of Arc Voltage Increasing Characteristics in Plate Driven by Airflow Field

作　　者：张明[1] 王永兴[1] 田宇[1] 董恩源[1] 丛宇 Zhang Ming;Wang Yongxing;Tian Yu;Dong Enyuan;Cong Yu(School of Electrical Engineering Dalian University of Technology ,Dalian ,116024 ,China;Dalian Electric Power Supply Company ,Dalian ,116000 ,China)

机构地区：[1]大连理工大学电气工程学院,大连116024 [2]大连供电公司,大连116000

出　　处：《电工技术学报》2019年第13期2752-2759,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金重点资助项目(51337001)

摘　　要：建立了以磁流体动力学(MHD)理论为基础的气吹灭弧室电弧被气流吹入栅片过程的三维数值分析模型。与当前空气断路器普遍研究的采用磁场驱动电弧进入铁磁栅片区域并被切割为若干短弧相比,主要研究在灭弧室的进气口处施加气流来驱动电弧运动,并采用绝缘栅片来拉长和冷却空气电弧以提高电弧电压。基于商业软件包ANSYS FLUENT 并对其进行二次开发,对气吹灭弧室中的多物理场耦合进行数值计算,仿真分析了不同材料栅片下电弧的运动和电压变化情况,采用全绝缘栅片可以获得最大的电弧电压;并比较分析了栅片间距和入口气压对电弧电压提升的影响,为开关电器中基于提升弧压应用场合的研究提供一定的指导作用。A 3-D numerical analysis model for air arcs splitting by airflow field in air blowing chamber based on magneto hydro dynamics (MHD) was established. At present, air circuit breakers generally use magnetic field driving arc to enter ferromagnetic plates area and cut into short arcs. Compare with that, the application of air flow outside to drive arc movement was mainly studied. The insulation plate was also used to elongate and cool the air arc to increase the arc voltage. Based on the commercial software package ANSYS FLUENT, the numerical calculation of multi physical field coupling in air blow chamber was carried out in this paper. The motion and voltage changes of arc under different material plates were simulated and analyzed. The maximum arc voltage can be obtained with all insulated plates. The effects of plate spacing and inlet air pressure on the arc voltage rise of the blowout chamber were compared and analyzed. This work will provide some guidance for the research on the application of arc voltage rise in switching devices.

关 键 词：磁流体动力学 栅片灭弧 气流场 电弧电压 

分 类 号：TM561[电气工程—电器]