摘要
通过阐述和分析中性点经低电阻接地方式接线的特点,结合某用户10kV低电阻接地系统实际参数,应用对称分量法分析其单相接地故障的特点。针对低电阻接地系统单相接地故障的特点,根据相关规程要求并结合理论分析及运行经验,对系统各元件的零序电流保护的配置、整定方法进行分析总结。提出一种简化整定的配置方案,希望对同行有借鉴、参考意义。
Characteristics of electric connection of low-resistance power system are introduced and analyzed.Single-phase grounding fault of a 10 kV low-resistance power system are analyzed by symmetrical component method.For its characteristics,setting and configuration of zero-sequence overcurrent protection of power line and busbar and transformer are concluded.a concise scheme of protection setting are also provided,it is hoped that it will be reference to peers.
作者
闫石
Yan Shi(Shenzhen Airport(Group)Co.,Ltd.,Shenzhen 518128,China)
出处
《智能建筑电气技术》
2022年第1期126-130,共5页
Electrical Technology of Intelligent Buildings
关键词
低电阻接地系统
单相接地故障
对称分量法
继电保护
零序电流保护
low-resistance grounding power system
single-phase grounding fault
symmetrical component method
relaying protection
zero-sequence overcurrent protection
