过电流导致的HVDC换流阀失效机制研究  

Study on Failure Mechanism of HVDC Valves Caused by Overcurrent in UHVDC Power Transmission Devices

作　　者：解婷[1] 查鲲鹏[2] 汤广福[2] 郑健超[2] 李彬[3] 

机构地区：[1]清华大学电机工程与应用电子技术系,北京市海淀区100084 [2]中国电力科学研究院,北京市海淀区100192 [3]大唐三门峡华阳发电有限责任公司,河南省三门峡市472143

出　　处：《电网技术》2010年第10期71-75,共5页Power System Technology

基　　金：国家自然科学基金项目(50677064)~~

摘　　要：为保障特高压直流输电装置的可靠性,有必要研究HVDC换流阀的失效机制。分析了HVDC换流阀的结构、桥臂及换流器外部短路引起过电流的情况,讨论了HVDC换流阀部件各种失效情况(如晶闸管开通失效、晶闸管关断失效等)的发展过程,确定了过电流引起故障导致换流阀失效的机制。To ensure reliability of UHVDC power transmission devices research on equivalent mechanism, it is necessary to research the failure mechanism of HVDC converter valves caused by overcurrent. The structure of HVDC converter valve and the overcurrent caused by short circuit in bridge arm and converter＇s external components are analyzed. The expension process of various failure conditions of different components of HVDC converter valve is analyzed, such as failures of thyristor firing and turn-off and so on, then the failure mechanism due to differnet faults of converter valve caused by overcurrent at different stages is determined.

关 键 词：HVDC换流阀 过电流 失效机制 

分 类 号：TM721.1[电气工程—电力系统及自动化]