摘要
基于收缩效应的镓铟锡液态金属限流器能够有效地限制系统故障电流。在其限流过程中,镓铟锡金属会受热气化,同时电弧会在该金属气态介质中产生,有必要对该电弧特性进行研究。基于磁流体动力学理论,建立以镓铟锡金属蒸气为介质的镓铟锡金属蒸气电弧模型,对液态金属电弧由完全发展状态直至熄弧的整个收缩过程进行仿真,从而获得电弧收缩过程气流场、压力场、温度场等场量的分布和变化规律,并通过对电弧气流场和温度场的分析,研究电弧对电极的侵蚀原因。这为进一步研究限流器中金属蒸气电弧动态发展的物理过程打下了基础。
The liquid metal fault current limiters( LMFCL) based on self-pinch effect is effective in limiting the system fault currents. In this current-limiting process,the Ga In Sn metal will be vaporized,along with the electric arc occurring in this gaseous medium. It is necessary to conduct research on the characteristics of this type of arc.Based on magnetohydrodynamics( MHD) theory,the Ga In Sn arc model in gaseous Ga In Sn medium was built. The simulations were conducted on the whole process from fully-developed Ga In Sn vaporization to arc extinction. From these simulations,the distribution and characteristics of velocity field of gas,pressure field,temperature field,etc.were obtained. Through the analysis on these characteristics,the reason for electrode erosion imposed by arc was studied. This work provides the foundation for further research on electric arc evolution in gaseous metal of LMFCL.
作者
贺开华
霍腾宇
李佳泽
赵鹏
吕思雨
朱晓楠
HE Kaihua;HUO Tengyu;LI Jiaze;ZHAO Peng;LU Siyu;ZHU Xiaonan(Naval Representatives Office of Hunan,Xiangtan 411101,China;College of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,China)
出处
《电器与能效管理技术》
2018年第23期12-18,共7页
Electrical & Energy Management Technology
关键词
故障限流器
镓铟锡
液态金属
电弧仿真
数值模型
fault current limiter
GaInSn
liquid metal
arc simulation
numerical model
