摘要
换流器作为换流站的核心设备,其保护策略直接关系到直流输电工程的安全稳定运行。本文通过RTDS试验对原有的直流控保策略进行校核,分析了单阀接地故障中,健全阀组无法正常重启的原因,提出控保策略改进措施缩短高低端阀组闭锁时间差,实现了健全阀组的正常重启。最后通过RTDS试验验证了改进控保策略的可行性。
As the core equipment in the converter station, the converter protection strategy is directly related to safe and stable of UHVDC projects. This paper checks the existing protection strategy through RTDS experiment, analyzes the failure reason of the perfect valve group restart and puts forword the improvement measures of the protection strategy to realize the restart of the perfect valve group by shorting the locking time difference between the perfect and fault valves. The feasibility and practicality of improvement is verified by RTDS experiment.
出处
《湖南电力》
2017年第5期74-78,共5页
Hunan Electric Power
关键词
单阀接地
健全阀组重启
差动保护
控保策略
single valve group earthing fault
restart of the perfect valve group
differential protection
protection strategy
