一种快速切除HVDC输电系统接地极线路接地故障的方案  

A Proposal for Fast Tripping Grounding Electrode Line Fault of HVDC

作　　者：肖遥 牛保红 尚春 林志波 陆岩 樊灵孟 李三 

机构地区：[1]南方电网超高压输电公司,广东省广州市510620

出　　处：《电力系统自动化》2009年第18期107-109,共3页Automation of Electric Power Systems

摘　　要：兴安直流输电系统逆变侧接地极线路与直流线路同杆并架敷设。在直流线路遭雷击后,接地极线路因感应过电压继发接地故障,在高压直流(HVDC)输电系统单极故障重启不成功的条件下,两回并行的接地极线路不平衡电流保护动作,导致直流输电系统双极闭锁。为了彻底消除接地极线路故障导致的HVDC输电系统闭锁现象,提出在换流站接地极线路出口处装设直流断路器灭弧的方案,并相应调整了接地极线路的控制和保护策略。On inverter side of Xingren to Baoan HVDC link, grounding electrode line is assembled on the same tower with HVDC line. When HVDC line experiences a lightning, the induced over voltage on grounding electrode line will cause a ground fault. If one of the pole blocks and fails to restart, then the unbalanced current protection for parallel grounding electrode lines actuates to block another pole operation. In order to prevent such a phenomenon, a method of inserting DC breakers into both grounding electrode lines is proposed. The control and protection strategy of the grounding electrode line is adjusted correspondingly.

关 键 词：HVDC输电 接地极线路 过电压 

分 类 号：TM862[电气工程—高电压与绝缘技术]