摘要
小电流接地故障是供配电系统中的常见故障,会对供电系统安全可靠运行构成严重威胁。该文基于目前比较趋于完善的小电流选线技术,对现有选线装置采用的选线方法进行了分析,与目前在实际运用中出现的问题,并提出了改进方法,同时提出了接地故障处理的方法与现有选线装置逻辑相结合,即按照选线—跳闸—重合—隔离故障的方法处理小电流接地故障。通过比较分析,认为该方法可以减小故障对系统的危害,并可以减少因故障造成停电的后果。
The single-phase-to-earth faults,which are the frequent faults,have much influence on the Safety and stability of the running for the power feeder system.This paper according to the development of the technology of line selection in neutral indirectly grounded system,analyzes the selective methods of line selection devices,and the problems in use of complex condition.That is,the single-phase-to-earth faults can be settled in the method of line selection-trip-reclose-isolation,combined with the devices logic.The advantage of the method by comparison and analysis includes reducing the hurt of system and the results of power cutting caused by the faults.
出处
《机电工程技术》
2009年第1期92-94,112,共4页
Mechanical & Electrical Engineering Technology
关键词
单相接地故障
故障选线
重合闸
供电可靠性
single phase-to-ground fault
fault line detection
recluse
power supply stability
