高电压技术2017，Vol.43Issue(7)：2154-2160,7.DOI:10.13336/j.1003-6520.hve.20170628008
天广直流工程换流阀异常导通原因分析及对策
Cause Analysis and Countermeasures for the Abnormal Conduction of Converter Valve in Tian-Guang HVDC Project
摘要
Abstract
Four abnormal conduction events have occurred in the converter valve of Tian-Guang HVDC project since July 2014.First,we studied the working principle of TE board,and established a simulation model of TE board.Then,we built a test platform of TE board in China Southern Power Grid Company DC transmission Equipment Condition Assessment and Fault Diagnosis Key Laboratory to carry out the voltage test under normal and high humidity environments.Results show that the surface of TE board is seriously polluted after the long time operation,and the threshold of the back-up trigger function is reduced greatly under the high humidity working conditions,resulting in the abnormal conduction of the electric trigger converter valve under the normal charging process of converter transformer.The anti-accident countermeasures such as regularly cleaning the TE board and controlling the valve hall humidity are successfully used in Tian-Guang HVDC project,and ca completely solve the problem of abnormal conduction of the electric trigger converter valve under the normal charging process of converter transformer.关键词
电触发换流阀/异常导通/换流阀晶闸管电子板/后备触发回路/触发脉冲/加压试验Key words
electric trigger converter valve/abnormal conduction/converter valve thyristor electronics/backup trigger circuit/trigger pulse/voltage test引用本文复制引用
王振,钱海,周尚礼,陈欢,国建宝,李晋伟..天广直流工程换流阀异常导通原因分析及对策[J].高电压技术,2017,43(7):2154-2160,7.基金项目
中国南方电网公司科技项目(012000KK52150018).Project supported by Science and Technology Project of China Southern Power Grid Co.,Ltd.(012000KK52150018). （012000KK52150018）
