简要介绍了城市轨道交通供电系统中接触轨的组成及安装工艺方法。
It is introduced in this paper the composition and installation techniques of conductor rails in the urban rail transit power supply system.
城市轨道交通牵引供电系统采用12脉波整流机组和24脉波整流机组进行整流，所产生谐波以11次、13次、23次和25次谐波为主。
Urban mass transit adopts 12 pulse and 24 pulse rectifier, whose high frequency harmonics mainly is 11 times, 13 times, 23 times and 25 times harmonics.
由于在小波降噪中不同的阈值适应的信号特征不同，采用多种小波阈值对城市轨道交通牵引供电系统谐波信号进行降噪，并从中选择了最优的降噪阈值，达到对信号的优化处理。
Due to different wavelet threshold fit for different characteristic of signal, various wavelet de-noise threshold was used to decline the harmonics of signal and the best threshold was chosen.
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