不接地系统单相接地保护动作逻辑分析与改进  

Analysis and Improvement of the Action Logic of Single-Phase Grounding Protection for Ungrounded Systems

作　　者：李鹏飞 谢仪青 陈亚斌 高海涛 LI Pengfei;XIE Yiqing;CHEN Yabin;GAO Haitao(Hongsheng Electricity and Heating Co.,Ltd.,Jiayuguan,Gansu 735100,China)

机构地区：[1]嘉峪关宏晟电热公司,甘肃嘉峪关735100

出　　处：《冶金动力》2024年第6期6-9,共4页Metallurgical Power

摘　　要：某10 kV不接地系统采用高压电缆辐射式供电,系统内配置1套消弧消谐柜。运行中发现,在特定区域发生单相弧光接地故障后,接地保护、消弧消谐柜均不能快速熄灭弧光,致使单相接地故障发展为相间短路故障。为解决该问题,对单相接地故障继电保护、消弧消谐动作逻辑进行优化改进,以确保系统内任何区域发生单相接地故障,均可快速熄灭弧光,消除故障。The high-voltage cable radial power supply is used in a 10 kV ungrounded system,and the system is equipped with a set of arc suppression and harmonic elimination cabinets.During operation,it was found that after a single-phase arcing fault occurred in a specific area,the grounding protection and arc suppression and harmonic elimination cabinet could not quickly extinguish the arc,resulting in a single-phase grounding fault developed into a phase-to-phase short-circuit fault.In order to solve this problem,the single-phase ground fault relay protection,arc suppresion and harmonic elimination action logic is opti⁃mized and improved to ensure that if a single-phase ground fault occurs in any area of the system,the arc can be quickly extinguished and the fault can be eliminated.

关 键 词：不接地系统 单相接地 消弧消谐柜 弧光 

分 类 号：TM642[电气工程—电力系统及自动化]