摘要
以某风电场为例,通过分析单相接地故障后集电线路的零序电流分布情况,发现中性点接地电阻阻值选择不合理时,集电线路零序电流保护不能同时满足灵敏性与选择性的要求。通过优化中性点接地电阻阻值和集电线路零序保护整定方法,达到了继电保护要求,提高了集电线路的运行稳定性。
Take a wind farm as an example,analyze the the zero-sequence current of network diagram after single-phase earth fault.The incorrect neutral grounding resistance will cause that the collector circuit zero-sequence current protection can't satisfy the requirement of sensitivity and selectivity.By optimizing the neutral grounding resistance and the zero-sequence setting method for collector circuit,the relay protection requirement is reached,and the stable operation capacity of the collector circuit is improved.
作者
王欢
WANG Huan(Power China Chengdu Engineering Corporation Limited,Chengdu 610072,China)
出处
《内蒙古电力技术》
2018年第3期11-15,共5页
Inner Mongolia Electric Power
关键词
风电场
集电线路
接地成套装置
继电保护
单相接地
接地电阻
零序电流
wind farm
collector line
grounding complete sets
relay protection
single phase grounding
grounding resistance
zero-sequence current
