现代行波测距技术及其应用

介绍了利用电压、电流行波进行线路故障测距的方法。单端法是测量故障产生的行波在故障点及母线之间往返一趟的时间来计算故障距离，双端法利用故障行波到达线路两端的时间差测距。阐述了故障行波信号的测量、超高速记录、行波脉冲的小波检测以及双端装置时间精确同步等关键技术问题的解决方案以及行波测距技术实际应用中的若干问题。

MODERN FAULT LOCATION TECHNIQUES BASED ON FAULT GENERATED TRAVELLING WAVES AND THEIR APPLICATIONS

Working principles of transmission line fault location techniques based on fault generated voltage and current travelling waves are introduced.Type A fault location technique measures time delay between the first and second surge from fault point.Type D measures arriving time of fault initiated surge at both ends of the monitored line.Type E measures time delay of reflection at fault point to the surge injected by circuit breaker reclosing.Some key techniques, such as measurement of fault generated travelling wave signals, super high speed records, wavelet detection of travelling wave pulses and the precise time synchronism of double-end equipment, that make modern fault location techniques based on travelling wave practically applicable are discussed.