摘要
35 kV及以下电压等级的变电站都是采用小接地短路电流运行方式,文章仅就此类变电站运行中发生的单相接地、电压互感器熔断器熔断、电磁式电压互感器引起的铁磁谐振现象加以分析,找出运行过程中几种常见现象的异同及参量的变化规律,为运行人员提供正确判断的理论依据。
The paper is focused on the analysis of the phenomena of single-phase earthing, the breaking of PT fuses and ferro-mag-netic resonance caused by PT of electro-magnetic type. These phenomena occur in the substations of 35kV and lower voltage grade, the operation mode of which is the mode of small earthing current. The similarity and difference among these phenomena are analyzed, and the parameters variation in operation are found. This knowledge can be used as the theoretical basis of qualitative analysis and correct judgment for operators.
出处
《电力科学与工程》
2005年第2期14-18,共5页
Electric Power Science and Engineering
关键词
小接地系统
单相接地
电压互感器
熔断器
铁磁谐振
small earthing current system
single phase earthing
PT (Potential Transformer)
fuse
ferro-magmetic reso- nance
