液态金属限流器零前熄弧现象及气压特性的试验研究  

Experimental Research on Arc Extinguishing Before Current Zero and Air Pressure Characteristics of Liquid Metal Current Limiter

作　　者：章程 鲁创 

机构地区：[1]武汉船用电力推进装置研究所,湖北武汉430064 [2]武汉长海电气科技开发有限公司,湖北武汉430064

出　　处：《电器与能效管理技术》2015年第10期9-14,共6页Electrical & Energy Management Technology

摘　　要：为了研究自收缩型液态金属限流器在大电流情况下的限流特性,设计了一种观察限流过程中限流波形的试验方案。发现了电弧在电流过零前提前熄灭的现象,提出限流过程中装置内部气压是导致这种现象的主要原因,进而得到了限流过程中限流器内部的气压特性。同时,针对多孔串联限流器的试验样机在大故障电流峰值为22 k A下的限流反弹现象,进行了泄压改进,改善了其限流特性。Liquid metal current limiter （LMCL） ,taking advantage of liquid metal self-pinch effect to limit the peak of current, is a new type fault current limiter （FCL）. This paper dealed with the experimental research on current limiting characteristics of LMCL in the ease of large current. An experiment program was designed to watch the waveform which revealed that the arc was extinguishing in advance of current zero. It was proposed that the high pressure in the LMCL caused this phenomenon. Then the principle of air pressure in the LMCL is researched. At last, a current rebound of series of LMCL in the circumstance of 22 kA was found and LMCL with pressure release function was put forward to improve the current limiting effect.

关 键 词：液态金属限流器 零前熄弧 气压特性 限流器串联 限流改善 

分 类 号：TM563[电气工程—电器]