激光触发真空开关极性配置特性的研究  

Research on the Polarity Configuration of Laser Triggered Vacuum Switch

作　　者：何正浩[1] 魏良才[1] 毛晓坡[1,2] 王英[3] 林华中 罗亚运[1] 黄倩[4] 

机构地区：[1]华中科技大学强电磁工程与新技术国家重点实验室,湖北省武汉市430074 [2]国网湖北省电力公司电力科学研究院,湖北省武汉市430077 [3]华中科技大学激光技术国家重点实验室,湖北省武汉市430074 [4]南昌工程学院,江西省南昌市330099

出　　处：《电工技术学报》2015年第14期215-219,共5页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金项目(51377071);中央高校基本科研业务费资助项目(HUST:2010JC018)

摘　　要：简单介绍了激光触发真空开关(Laser Triggered Vacuum Switch——LTVS)的基本结构和工作原理,对初始等离子体的产生和扩展所涉及的物理过程进行详细地分析,并对其工作在不同的极性配置方式下开展了一系列实验。主要研究LTVS在不同极性配置方式下的导通时延大小及其分散性的关系,从而为LTVS的结构优化设计提供理论依据。实验验证了LTVS在正极性配置下的工作可靠性高、时延小,当工作在正极性配置下,有利于阴极斑点的形成,减小导通时延及其分散性,提高其可靠性,说明了等离子体的扩展过程实际上是近阴极区等离子体鞘层的增长过程。The basic structure and working mechanism of Laser Triggered Vacuum Switch（LTVS） are briefly introduced, while the processes of primary plasma production and expansion are analyzed. A series of experiments have been carried out under different polarity configuration mode of LTVS, the dependence of conduction time delay and jitter time delay on polarity is described, the effect of main electrode and the expansion of primary plasma is analyzes, the theoretical basis for structure optimization design of LTVS is provided. Under positive polarity configuration, which is beneficial to generate the cathode spots, the high working reliability and small time delay of LTVS is verified by the experiments, it proves that the expansion of primary plasma is the growth of near cathode plasma sheath.

关 键 词：激光触发真空开关 极性配置模式 导通时延 抖动时延 初始等离子体 

分 类 号：TM46[电气工程—电器]