交直流串电引起特高压三阀组跳闸事件分析及改进措施研究  

Analysis of Trip Event of UHVDC Three-valve Group Caused by AC-DC Interference and Research on Improvement Measures

作　　者：甘卿忠 徐晟 冯家伟 黄华 李倩 Gan Qingzhong;Xu Sheng;Feng Jiawei;Huang Hua;Li Qian(Guangzhou Bureau of EHV transmission company Co.,Ltd.,Guangzhou Guangdong,510670)

机构地区：[1]超高压输电公司广州局,广东广州510670

出　　处：《电子测试》2022年第14期97-99,102,共4页Electronic Test

摘　　要：±800kV云广特高压输电工程受端穗东换流站在开展极1低端阀组单台换流变应急更换处置过程中,因交直流串电导致在运行中的另外三个阀组跳闸。为深入剖析该事件发生的原因以及研究有针对性的防范措施,文中对跳闸事件进行了回顾。分别从现场检修作业、最后断路器回路设计、分布电容等角度分析跳闸事件发生的原因,指出了该工程最后断路器回路技术路线存在设计缺陷,最后提出了相应的改进措施,对高压直流输电工程的设计、电网安全稳定运行具有重要的意义。±800kV Yunguang UHVDC transmission project Suidong Converter Station was carrying out emergency replacement of a single converter transformer of Pole 1 low valve group,and the other three valve groups in operation were tripped due to AC-DC interference.In order to deeply analyze the causes of the incident and study targeted preventive measures,the article reviews the trip incident.The reasons for the trip event were analyzed from the perspectives of on-site maintenance,last breaker protection circuit,distributed capacitance,etc.,and the design defects of last breaker protection circuit technical route of the project were pointed out.Finally,improvement measures were proposed for the HVDC transmission project.It is of great significance to the design of HVDC transmission projects and the safe and stable operation of the power grid.

关 键 词：特高压 交直流串电 最后断路器 改进措施 

分 类 号：TM83[电气工程—高电压与绝缘技术]