葛洲坝换流站极Ⅱ换流阀故障分析  

Fault Analysis of Pole Ⅱ Thyristor Valves in Gezhouba Converter Station

作　　者：凌云[1] 郭焕[2] 

机构地区：[1]国家电网公司运行分公司宜昌管理处,湖北宜昌443005 [2]中国电力科学研究院,北京100192

出　　处：《华中电力》2010年第6期57-60,共4页Central China Electric Power

摘　　要：对2008年12月28日葛洲坝换流站极Ⅱ换流阀故障情况进行了说明,介绍了随后进行的各项相关检查和试验,对换流阀故障原因进行了详细分析,指出晶闸管老化,部分晶闸管耐压能力降低及漏电流增加是引起换流阀故障的主要原因,并对晶闸管相关老化问题进行了说明,提出了建设性的预防措施。The fault of poleⅡ thyristor valves happened on 28th Dec.2008 in Gezhouba converter station is introduced in this paper,relative inspections and tests subsequently taken are also presented,the detailed analysis of fault cause is given.It is concluded that the degradation of voltage withstand ability and the increase of leakage current of some thyristors resulted from thyristor aging is the main cause of the fault.Moreover,the relative problems of thyristor aging are illuminated and some constructive preventive advices are also proposed.

关 键 词：葛洲坝换流站 换流阀 故障 晶闸管老化 耐压能力 

分 类 号：TM711[电气工程—电力系统及自动化]