中文摘要：

为解决小电流系统行波故障选线现场应用问题，提出了一种基于单相电流行波的故障选线原理：不管是故障相还是非故障相，故障线路单相接地故障相电流初始行波远大于非故障线路，且故障线路行波与非故障线路行波极性相反。该故障选线方法既不需要配备专用的零序电流互感器，也能克服两相或多相电流行波选线现场接线复杂且易于出错的不足；既能够满足电缆出线小电流系统的选线需要，也能满足架空出线系统的选线需要。仿真实验结果表明：所提方法是正确可行的。

英文摘要：

The paper presents a novel fault line selection using single-phase current traveling wave after analyzing each phase current traveling wave of fault line and sound lines generated by single-phase-to-ground fault. Whether the phase is faulted phase or sound phase, single-phase-to-ground fault generated current traveling wave in faulted line is much higher than the wave in sound line, and the polarity is reverse. The method works well without special zero-sequence current transducer and is easy to be implemented in the field with simple wiring compared with two-phase or three-phase current traveling wave methods, And the method tan not only be applied to cable lines but also overhead lines. Simulation results show that the method is correct and available.