【摘要】 对行波测距式距离保护的原理、动作特性等进行了详细的分析 ,其主要优点在于 :1不需要载波通道 ,在通信线路故障情况下仍能保证装置的可靠动作 ;2在判断出故障的同时能精确给出故障距离 ,即集保护和故障测距为一体。文章利用小波变换对行波距离保护进行了深入的分析 ,指出了其中存在的问题并提出了解决办法。 EMTP仿真结果证明了分析的正确性和解决方法的可行性更多还原

【Abstract】 The principle and characteristics of single terminal data based distance protection with travelling wave fault location are analyzed in detail. The main advantages of this protection lie in the following: (1) Having no use for carrier channel it can act correctly while the communication line is faulty; (2) The faulty position can be accurately found out as soon as the fault is distinguished, i.e., the fault location and the protection are integrated. Through the application of wavelet transform the distance protection itself is analyzed in depth, the existing problems is pointed out and its solution is given. The simulation results by EMTP show that the analyses are correct and the solution is feasible.更多还原