特高压直流输电系统金属旁通支路运行工况分析与对策  

Analysis and Countermeasures of Operation Conditions of Metallic-bypass Branch in UHVDC Transmission System

作　　者：陈乐[1] 佘振球 王俊生[1] 王杨正[1] 徐斌[1] 卢东斌[1,3] CHEN Le;SHE Zhenqiu;WANG Junsheng;WANG Yangzheng;XU Bin;LU Dongbin(NR Electric Co.,Ltd.,Nanjing 211102,China;DC Technical Center of State Grid Corporation of China,Beijing 100032,China;NARI Group Corporation(State Grid Electric Power Research Institute),Nanjing 211106,China)

机构地区：[1]南京南瑞继保电气有限公司,江苏省南京市211102 [2]国家电网有限公司直流技术中心,北京市100032 [3]南瑞集团有限公司(国网电力科学研究院有限公司),江苏省南京市211106

出　　处：《电力系统自动化》2020年第2期228-234,共7页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目（51607042）~~

摘　　要：在双12脉动阀组串联结构的特高压直流工程中,以下过程可能导致系统进入金属旁通支路运行:直流场开关或刀闸的手动/自动控制、极层保护性闭锁、阀组保护性退出。文中针对各类金属旁通支路运行工况的形成过程进行了阐述,并提出了相应对策。对于金属旁通支路运行工况的处理,应以预防作为主要原则,而以极隔离、中性母线开关失灵保护等隔离手段作为补充措施。文中所提出的对策已在南方电网滇西北至广东±800 kV特高压直流工程中应用,并经工程现场与仿真系统试验验证,可有效解决双12脉动阀组串联结构中的金属旁通支路运行问题。In the ultra-high voltage direct current(UHVDC) projects which is based on the structure of dual 12-pulses valve groups in series, the following actions may lead to the metallic-bypass branch operation: the manual and auto sequence control of switching equipment in DC yard, the protective blocking of one pole, the online protective quitting of valve groups. This paper describes the forming process of the metallic-bypass branch operation and proposes the corresponding countermeasures. The prevention should be taken as the major principle in dealing with metallic bypass branch operation, and the isolation methods should be taken as the supplementary measures,such as the pole isolation and the failure protection of neutral bus switch. The countermeasures described in this paper have been applied in the ±800 k V UHVDC project from northwest Yunnan to Guangdong in China Southern Grid.The on-site test and simulation test show the problem of metallic-bypass branch operation in dual 12-pulses valve groups in series has been effectively solved.

关 键 词：阀组串联 直流输电 金属性旁通 保护性闭锁 

分 类 号：TM721.1[电气工程—电力系统及自动化]