【作者】 黄昌萍；

【导师】 李群湛；

【作者基本信息】 西南交通大学 ， 轨道交通电气化与自动化， 2013， 硕士

【摘要】 近年来,我国已建成的高速铁路因弓网离线引发的事故时有发生,为了保障高速列车及其电气设备的安全运行,研究弓网离线对高速列车产生的影响,是当前亟需解决的问题之一。目前,已有学者针对弓网离线问题进行研究,但主要侧重于牵引网离线过电压、弓网离线电弧检测技术以及离线引起的电磁干扰问题等,尚未涉及离线对高速列车的影响研究。本文以弓网离线对高速列车的影响为研究对象,首先对弓网受流特性以及高速受流质量的评价标准进行了概述,指出可以根据离线时间的长短来评价列车受流质量。分析了弓网离线时产生电弧的原理、特性及其危害,根据电弧的特性建立了基于能量描述的电弧仿真模型。针对我国高速铁路常用的牵引变压器和牵引网结构,以CRH2型动车组和CRH3型动车组为研究对象,根据功率平衡关系计算出动车组中间直流回路相关技术参数,并利用PSCAD/EMTDC仿真软件搭建了牵引供电系统和整流器采用瞬态直接电流控制策略的高速列车模型。其次,本文结合弓网离线的过程以及离线的分类,针对受电弓离线对CRH3型动车组车载变压器进行了相关的仿真分析。结果表明弓网离线时,车载变压器铁芯中有无励磁涌流与电弧是否拉断以及变压器铁芯中剩磁大小有关。最后,针对受电弓离线对CRH2型和CRH3型动车组牵引功率的影响进行了相关的仿真分析。结果表明,离线期间产生的电弧在不拉断情况下,电弧电阻阻值变化范围越大,列车牵引功率下降越多。更多还原

【Abstract】 In recent year, occasional accidents has happened several times due to the contact loss in the present high-speed railway system. Therefore, to guarantee the operation of the train and its electrical equipments, research in the interaction between the contact loss and the high speed train is one of the desperate needs.Though the event that pantogragh deviates from catenary has been reported, which focuses on the over-voltage of separation between the pantogragh and the catenary, arc detection technology of the separation between the pantogragh and catenary, and electromagnetic interference caused by arcs in pantogragh-catenary system But the interaction between the high-speed train and the contact loss has never been reported.In this paper, we aimed at the interaction between the contact loss and the high-speed train. Firstly, we summarized the characteristics and the criteria of the pantogragh and catenary current collection., and pointed out that the length of time in the contact loss can be metric in appraising the current collection quality of the high-speed train. Secondly, we analysed the causality, characteristics and consequences of the electrical arc when the pantogragh deviates from catenary. And thirdly, we built a simulation model of arc based on an energy metric.Considering the common traction transformer and the catenary of the high-speed railway system in our country, we considered CRH2and CRH3type EMU as the object, calculated the related technichal parameters of the high-speed train intermediate DC loop based on the power balance relationship, and built a traction power supply system equivalent circuit model and the high-speed train model on the principles of transient current control.We conducted a simulation analyses, aiming at the interaction between the contact loss and the inrush current of the transformer in CRH3type EMU, with the process of the contact loss between the pantogragh and the catenary and classification of it in account. Our result indicated that the inrush current was related to the magnitude of the residual magnetism in the iron core of transformer and whether the arc was pulled apart.Finally, we conducted a simulation analyses, aiming at the interaction between the contact loss and the traction power of the high-speed train. Our result indicated that the tracion power decreases with the increase of the arc resistance varying range when the arc does not pull off during the contact loss.更多还原