基于AR模型的电气化铁路接触网线谱研究

Study on Electrical Railway Catenary Line Spectrum Based on AR Model

针对目前电气化铁路中难于准确对不同线路及弓网耦合特性进行对比及整体性能评判的问题,采用AR谱模型构建接触网线谱,对不同线路、不同列车速度、不同型号受电弓、不同风速下的弓网耦合动态特性进行分析评估。研究表明:虽然不同工况下弓网时域统计参数均满足设计标准,但难于用直观量化的评估手段对其进行区别,利用不同谱峰值的突变可明确显示不同线路弓网动态耦合质量;接触网线谱可以作为划分线路速度等级的一种指标参考;不同型号受电弓与特定接触网耦合的接触网线谱显示出明显的区别;利用接触网线谱可以量化风场对接触网性能的影响,为接触网防风设计提供一种评估参考。

In order to solve the difficult problem of making accurate contrast and overall evaluation of differential coupling characteristics of catenaries and pantographs of electrical railways,the AR spectrum model was adopt- ed to construct the catenary line spectrum and to analyze dynamic catenary-pantograph coupling characteristics of different railway lines, at different train speeds, with different types of pantographs and under different wind speeds. The conclusions show as follows：Although the time domain statistical catenary-panntograph parame- ters under different operating conditions can meet design standards,it is difficult to make any direct-vision and quantitative assessment to distinguish among them; mutations of peaks of different spectra explicitly demon- strate the dynamic catenary-pantograph coupling quality of different railway lines; the catenary line spectrum can be used as a reference index of grading of line speeds;the catenary line spectra coupled between different types of pantographs and a specific catenary network differ apparently from one another; the catenary line spec- tra can quantify the impact of the wind field on catenary performance and provide an assessment reference to windbreak design of catenary.