暂态行波在小电流接地故障选线中的应用

为了解决小电流接地系统的故障选线问题,分析了常规的各种小电流接地故障选线方法,讨论了小电流接地系统故障产生的初始电流行波以及由多次行波折射、反射形成的暂态电流信号的故障特征,以及分别利用故障初始行波和暂态信号的选线原理。最后,分析了暂态行波选线方法的技术特点和应用前景。

Application of Transient Travelling Waves to the Selection of SmallCurrentGrounding Fault Feeder

To solve the problem of fault feeder selection in small current grounding system, this paper analyzes various conventional fault feeder selection methods for the system, discusses the characteristics of the initial current travelling waves from the feeder fault of the system, the transient current signals integrated by refractions and reflections of the travelling waves as well as the fault feeder selection principles based on the initial current travelling waves and the transient signals. Finally, the technical features and application prospects of the transient travelling wave based fault feeder selection are analyzed.