电气化铁路接触网不平顺分析及功率谱研究
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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。
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.
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。
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.
引文
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[9]Zhang W.Mei G,Zeng J.A study of pantograph/catenary system dynamics with influence of presage and irregularity of contact wire[J]. Vehicle System Dynamics,2003, 37 (Supp):593-604.
[10]陈国.基于模糊聚类法的动车组弓网受流性能分析[D].西南交通大学硕士论文,2006.
[11]韩通新.车载弓网动态参数检测装置研究[M].北京：中国铁道出版社,2005.
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[13]黎国清,许贵阳.高速综合检测列车技术交流总结[R].北京：铁道科学研究院研究报告,2004.
[14]刘杰.接触网参数的非接触检测[J].电气化铁道,1998(2)：43-45.
[]5]张建荣.电气化铁路接触网拉出值检测技术浅析[J].太原科技,2001(3)：28-30.
[16]吴积钦.接触网检测车数据采集与数据处理系统[D],西南交通大学硕士研究生学位论文,1996.
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[18]黎新民,宋志刚,董明泉,邓建锋.高速电气化铁路接触线高平顺率的探讨[J].铁道技术监督,2002(2)：8-9.
[19]韩柱先,王国梁.刚性接触网的不平顺分析[J].铁道工程学报,2007(4)：61-64.
[20]T.Takemura,Y.Fujii,M.Shimizu.Characteristics of over-head rigid conductor line hav-ingT-type cross section[J]. Developments in Mass Transit Systems,1998 (4):173-177.
[21]Mandai,T,Shimizu,M,Harada.S.Development of rigid conductor line for high-speed operation [J].Industrial Technology,2003(12):587-592.
[22]苏平安.接触网参数检测系统研究[D].西南交通大学硕士论文,2003.
[23]梅桂明,张卫华.受电弓/接触网系统动力学模型及特性[J].交通运输工程学报.2002,(3)：20-25.
[24]梅桂明,张卫华.受电弓垂向动力学线性化模型及特性研究[J].铁道学报,2002,24(5)：28-32.
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[26]T,X.Wu,et al.Dynamic stiffness of a railway overhead wire system and its effect on Pantograph-catenary system dynamics[J].Journal of sound and Vibration.1999(3): 483-502.
[27]M.Arnold,B.Simeon,et al.Pantograph and catenary dynamics:A benchmark Problem and its numerical solution[J].Aoolied Numerical mathematics.2000(34):345-362.
[28]Tong-jin Park,Chang-soo Han,Jin-Hee Jang,et al.Dynamic sensitivity analysis for the Pantograph of a high-speed rail vehicle[J].Journal of Sound and Vibration.2003(266): 235-260.
[29]Dr. Albreehht Brodkorb,Erlangen and Manfred Semrau,Halle. Simulations model DES system Oberleitung-skettenwerk and Stromabnehmer Elektrisehe Bahnen.1993(4).
[30]付秀通.轮/轨-弓8网系统藕合动力学数值模拟分析与试验研究[J].铁道学报,1998(3)：25-32.
[31]李丰良,孙焰.TSG23受电弓的力学模型及运动微分方程[J].铁道学报,1998(6)：119-121.
[32]蔡成标,翟婉明.高速铁路受电弓-接触网系统动态性能仿真研究[J].铁道学报,1997(5)：38-43.
[33]Arie levant, Alessandro Pisano,Elio Usai.Output-feedback control of the contact-force in high-speed-train pantographs[J],Proceedingsofthe 40th IEEE Conference on Decision and Control,Orlando, FloridaUSA,2001,12:1831-1838.
[34]Poetsch G,Evans J,Meisinger R,Kortum W,Baldauf W.Pantograph/catenary dynamics and control[J]. Vehicle System Dynamics,1997,30:159-195.
[35]梅桂明,张卫华.受电弓垂向动力学线性化模型及特性研究[J].铁道学报,2002(5)：28-32.
[36]Wu T X,Brennan M J.Basic analytical study of panto-graph-catenary system dynamics [J]. Vehicle System Dynamics,1998,30(6):443-456.
[37]颜龙,刘刚,郭军.语言信号时频谱分析[J].电子测量技术,2005(2)：4-6.
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