自激振荡式高压直流断路器开断能力的研究  

An Investigation on Interrupting Capability of an HVDC Self - Excited Oscillation Breaker

作　　者：孙广生[1] 王永荣[1] 冯荣琼 严萍 

机构地区：[1]中国科学院电工研究所

出　　处：《电工技术学报》1993年第4期6-10,共5页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金

摘　　要：采用Ls、Cs转移回路及ZnO吸能装置与交流断路并联,是目前世界上最简单可靠的高压直。无开断方法。这种自激振荡式高压直流断路器,利用交流断路器气吹电弧的不稳定性和负阻持性,产生幅值逐渐增大的自激振荡电流,叠加工待开断的直流上,产生人工零点.完成电流转够实现开断。开断装置(交流断路器)的电弧持性及其结构的选择和转移回路参数将直接影响整个断路器的开断能力。文章通过对不同转移回路参数及结构开断能力试验结果的理论计算与分析。得出转移回路参数选择方法及开断装置改进设计的技术要求。The simplest and most reliable method of HVDC interiuption in the world is usingan AC breaker connected in parallel with Ls. Cs commutation circuit and ZnO energyabsorber. The instability and negative resistance characteristic of AC breaker's blastare are used to produce increasing high frequency oscillation current to be superimposedon DC current to create current zero. So the arc's property of AC breaker and theparameters of commutation circuit play an important role in the interrupting capabilityof this HVDC self-excited oscillation breaker. In this paper. the experimental resultsof interruption with different porameters or commulation circuit are described and discussed by using mathematical model of arc. The method of selecting parameters ofcommutation circuit and the improving principle of AC breaker are introduced.

关 键 词：直流断路器 振荡 开断能力试验 

分 类 号：TM561[电气工程—电器]