【摘要】 对现有的定位原理和方案进行了系统归纳并将其概括为三类:一类是以在线路端点处测量故障距离为目的的故障测距法;一类是故障发生后通过向系统注入特定信号实现寻迹的信号注入法;还有一类是根据故障点前后故障信息的不同确定故障区段的户外故障点探测法。概略分析了各种故障定位方法各自的优缺点以及适用的故障类型,在此基础上阐述了目前配电网故障定位存在的问题。最后探讨了配电网故障定位技术的研究方向和发展前景。更多还原

【Abstract】 Networks with ungrounded neutral are widely used in distribution system in China,it is an important subject on how to detect line fault especially single phase to earth fault in power system protective relaying.Through reviewing the relevant published documents,this paper summarizes all the existing theories to three types,including measuring fault distance on line’s terminal,injecting stated signal in power system to search fault point, and check fault information’s difference on fault point’s forward and behind to confirm fault section.Advantages and disadvantages of these methods are analyzed respectively,based on which the problems existing in the field are proposed.In the end,the research orientation and further development of fault location technique are discussed. This paper is supported by National Natural Science Foundation of Shandong Province(No.2004ZX26).更多还原