【作者】 谢建；

【导师】 刘志刚；

【作者基本信息】 西南交通大学 ， 轨道交通电气化与自动化， 2010， 硕士

【摘要】 电气化铁路接触网担负着把从牵引变电所获得的电能直接输送给电力机车使用的重要任务。列车运行时,受电弓通过与接触网滑动接触而取得电能传送给电力机车。随着电气化铁路列车运行速度的不断提高,受电弓与接触网之间的受流性能倍受关注。接触网不平顺是影响受电弓与接触网接触受流性能的主要原因之一,对列车运行的安全性、平稳性和舒适性都有着重要影响,也是限制列车运行速度提高的主要因素。在已有轨道不平顺和轨道谱研究成果的基础上,从接触网不平顺检测数据的时频分析方面对接触网不平顺进行了研究。接触网不平顺功率谱可以揭示隐含于看似杂乱无章、不规则的接触网不平顺随机波形的许多信息。目前还没有接触网不平顺功率谱模型的分析研究,也没有利用接触网不平顺功率谱分析接触网不平顺的研究。针对这些问题,本文在以下方面做了尝试。为了得到合适的接触网不平顺功率谱模型,对轨道谱模型进行了深入的分析。通过对几种模型的实验分析,给出了适合于接触网不平顺功率谱的模型,并利用实际线路接触网不平顺的检测数据验证了该模型的合理性。另外,以所确立的接触网不平顺功率谱模型为拟合模型,对四条实际线路160km/h和200km/h的接触网不平顺数据进行拟合,阐明了速度对接触网不平顺的影响。采用小波分析方法对接触网不平顺的检测数据进行分析,并对小波分解结果进行功率谱计算。大量的实测数据仿真实验,证明了本法能很好地揭示组成接触网不平顺的波长成分以及不平顺幅值。更多还原

【Abstract】 The important role of electric railway catenary is to transfer electrical energy from traction substation to electric locomotive. Through the moving contact, electric locomotive can obtain power energy from the pantograph. With the train speed’s increasing, the quality of pantograph-catenary current collection is paid more attention to. The catenary’s irregularity is the main factor that influences the quality of pantograph-catenary current collection, the safety, the stationary, the conformability and the velocity of the vehicles.The catenary irregularity is researched from time-frequency analysis of the data detected based on existing research results of track irregularity and track spectrum. The disorderly and irregular information of random catenary irregularity waveforms are revealed by catenary irregularity power spectrum. Recently, there is neither analysis and research of catenary irregularity power spectrum model, nor research of catenary irregularity based on catenary irregularity power spectrum. To solve these problems, some researches have been done in the following parts in the paper.The track spectrum model is analyzed deeply to obtain appropriate catenary irregularity power spectrum model.The appropriate catenary irregularity power spectrum model is given based on the experimental analysis of several models, and the rationality of this model is proved by using the data detected of actual line’s catenary irregularity. In addition, taking the established catenary irregularity power spectrum model as the fitting model, furthermore, the influence of velocity effects to catenary irregularity is elucidated through fitting four railway catenary irregularity data at 160km/h and 200km/h velocities.The data detected of catenary irregularity are analyzed by wavelet analysis, and then the wavelet decomposition results are used to calculate power spectrum. According to simulation experiments of large amounts of data, the wavelength components and irregularity amplitudes can be revealed by the proposed method.更多还原