摘要本文首先介绍了城市轨道交通的发展现状和方向,分析了国内外研究轨道交通的工具及手段。本文建立了包含全网牵引变电所、接触网、列车及回流轨道的直流牵引供电系统模型,以牛顿—拉夫逊法解算各网络参数。本文实现了对直流牵引供电系统的全面仿真,计算出牵引网的网压分布、变电站运行负荷、列车实际功率等。最后本文比较分析了所得的数据结果,从而验证了直流牵引供电系统模型的正确性。64220
在此基础上,本文介绍了杂散电流的研究现状,分析了国内外研究杂散电流的方法。并添加了杂散电流收集网的建模,对其进行仿真,计算和分析了杂散电流收集网上的电压,比较了变电所馈流点的电流值。由以上的数据分析得到地网结构对直流牵引供电系统仿真的影响。从以上两方面总结出直流牵引供电系统仿真需要改进的地方,并提出改进的方法。
毕业论文关键词 轨道交通 牵引供电仿真 杂散电流
毕业设计说明书(论文)外文摘要
Title Research on Modeling and Simulation for Train Power Supply System with Stary Current Collection
Abstract This article first describes the development of rail transportation,tools and technique for the study of rail transportation. This article builds the whole net model,incluing traction substation,overhead line system,trains,and reflux track.This article solves the network parameters by the Newton Raphson.This article considers DC traction power supply system and has figured out some data,incluing voltage distribution of traction power supply system,running load of traction substation,real power of trains.At last,this article compares and analyses the measured data,in order to overifie the validity of DC traction power supply system simulation.
On this basis,this article describes the development of stary current and status of study on it.the this article adds amodeling and simulation of stary current collection,figures out and analyses the voltage distribution of stary current collection,and compares the current of traction substation.Resulting from the data analysis above,this article reaches the influence to DC traction power supply system by earth screen.Two aspects from foregoing paragraphs are considered,it summarizes what needs to improve in the simulation of DC traction power supply system,and proposes the improved method.
Keywords Rail transportation traction power supply simulation stray current
1 绪论 1
1.1 研究背景及意义 1
1.1.1 地铁及地铁供电系统 1
1.1.2 杂散电流 2
1.2 国内外研究现状 3
1.2.1 牵引供电系统的研究方法 3
1.2.2 杂散电流的研究现状 4
1.3 本文研究的主要内容、目标与方法 5
2 直流牵引供电系统结构及模型 6
2.1 列车模型 6
2.1.1 列车的电流源和功率源模型 6
2.1.2 电阻制动时的列车模型 7
2.2 牵引变电所模型 7
2.3 接触网和轨道模型 9
2.4 地网结构模型 11
2.4.1 “走行轨—大地”模型