基于小波变换的行波测距法在铁路信号电源系统中的应用研究

Research of Application of Wavelet Transform Based Fault Distance Measurement of Traveling Waves in the Railway Signalling Power System

针对铁路10kV信号电源供电系统的特点,提出了一种基于小波变换的外加电压脉冲式行波测距法,就一些关键技术问题,提出了波速度折算算法和等效波速度法,分析了系统单相分支线路的影响,以及波速度确定等问题。文中以一条实际的铁路10kV信号电源供电系统为模型进行了仿真,仿真结果证明了所提方法的可行性。

This paper puts forward the algorithm of traveling wave based fault location with wavelet transform through adding the same voltage pulse to the three-phase generatrix line for the 10kv railway siqnaling power supply system. It also puts forward the algorithm of average wave velocity convertsion and analyzes the impacts of the embranchment lines in detail and discusses the selection of the velocity of the traveling wave. Finally it carries through a simulation analysis for a real 10kv railway signaling power supply system. The simulation results prove that the above algorithms are viable.