Convection effect on an arc plasma evolution process in a two parallel contact system

作     者：Jianning YIN Shungui LIU Feng TANG Qishen LV Xingwen LI 尹健宁;刘顺贵;唐峰;吕启深;李兴文

作者机构：State Key Laboratory of Electrical Insulation and Power EquipmentXi'an Jiaotong UniversityXi'an 710049People’s Republic of China Shenzhen Power Supply Co.LtdShenzhen 518020People's Republic of China 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2020年第22卷第4期

页      面：55-63页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 

基　　金：supported by the Natural Science Foundation of Shaanxi Province of China(No.2017ZDJC-16) Shenzhen Power Supply Co.Ltd(No.SZKJXM20170480) 

主　　题：air arc circuit breaker MHD 

摘      要：A low voltage circuit breaker(LVCB)is an important piece of protection equipment which will switch off the fault current in a power *** moving contact of a low voltage circuit breaker with a higher rated current consists of two parallel ***,the convection effect on the air arc evolution process in a two parallel contact system is analyzed.A threedimensional(3 D)magneto–hydro–dynamic(MHD)model of arc simulation is *** this model,the anode consists of two parallel contacts and a bonding conductor.A nonlinear voltage–current density characteristic is employed to represent the near-anode and near-cathode *** current density,arc voltage and currents through every contact are *** influence of convection and conduction on the arc evolution process are quantitatively *** displacements of the arc roots are obtained and the asymmetry of the arc root motion is *** arc evolution process of a two parallel contact system is preliminarily revealed.