Existing methods for travelling wave fault location don't combine the arrival time of travel-ling wave with the propagation velocity properly, which leads to poor location accuracy.
现有行波测距法基本上都没有把由该方法所确定的行波到达时间与故障定位用行波传播速度很好地结合起来，导致定位精度不理想。
The application of GPS in the transmission line travelling wave fault location and synchronous phasor measurement is discussed in the paper. The composition and principle of GPS are also presented.
文中讨论了GPS在电力系统的输电线路故障测距、同步相量测量等方面的应用，并较详细地介绍了GPS的组成和测量原理。
The key point to realize protective relaying and the fault location based on travelling wave is how to correctly distinguish and detect the travelling wave signal.
正确识别和检测线路故障后的行波信号是实现行波保护和故障测距的关键。
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