High-speed Train Detection Technology Between Pantograph And Catenary Current Collection Based On Traction System

This thesis relies on the project of 863 plan and it is mainly researching high-speed train detection technology of Pantograph-Catenary Current Collection. Catenary is the source of energy for high-speed train running. Pantograph-Catenary Current Collection performance directly impacts on train running safety and stability. Pantograph-Catenary relationship, wheel-track relationship and fluid-solid relationship constitute the high-speed train system dynamics coupling relationship. Therefore, research Pantograph-Catenary Current Collection has great significance for high-speed train.In this thesis, the detection scheme for detection Pantograph-Catenary electrical parameters, as conventional testing equipment detects only valid values,this scheme detects voltage and current transient and steady state. The detection adds the mutation point positioning, the voltage mutations amplitude and harmonic detection. DSP chips, because of its fast data analysis and calculation capability, based on the Fourier transform and wavelet transform algorithm, achieves rapid and effective detection of the Pantograph-Catenary data signal. Lab view as receive interface of the host computer, makes dates storage and display effectively. Using Mat lab Wavelet Toolbox, we can simulate wavelet de-noising process, make signal wavelet de-noising.This can easily adjust the wavelet function and the soft and hard threshold denoise, and change the threshold size, provide the choice of the actual wavelet function guidance.This thesis researches for the detection of the electrical parameters of high-speed train pantograph-catenary system. It makes the comprehensive testing of the Pantograph-Catenary system,and it helps Pantograph performance evaluation,which has important scientific significance and practical value.