铁道概论 课程新视野大学英语（ii） createtime ppt课件

Introduction to the railway铁道概论,检修111 史湘君 17号,铁道概论的基本知识,Introduction to the main railway basic knowledge and basic principle. Including transport properties, types and features of the railway and the railway construction and development of our country; 道概论主要学习铁路基本知识与基本原理。包括交通运输业的性质、种类和特征，世界铁路和我国铁路的建设与发展,铁道概论的基本知识,Rail lines, vehicles, motorcycles, trains, traction power supply system, station, signals and communications equipment such as basic structure and basic principle of railway transportation equipment; 铁路线路、车辆、机车、动车组、牵引供电系统、车站、信号及通信设备等铁路运输设备的基本构造和基本原理；,铁道概论的基本知识,Management system and the development strategy of Chinas railway, passenger high-speed, heavy-load transportation goods, basic knowledge of the railway operation management informationization. 中国铁路的管理体制与发展战略、客运高速、货物重载运输、铁路运营管理信息化的基本知识。,电气化铁路简介,Electrified railway traction power is electric locomotive, locomotive itself without energy,Energy needs by the power of traction power supply system provides. 电气化铁路的牵引动力是电力机车，机车本身不带能源，所需能源由电力牵引供电系统提供。,电气化铁路简介,Traction power supply system is mainly refers to traction substation and catenary of two parts.Substation near in railway, it will power transmission by high pressure from the current, to deliver the contact online. 牵引供电系统主要是指牵引变电所和接触网两大部分。变电所设在铁道附近，它将从发电厂经高压输电线送来的电流，送到铁路上空的接触网上。,牵引供电系统图片,电气化铁路简介,Railway Catenary is to direct transmission power electric locomotive of equipment.Along the sides of the railway lines, crowned by a row of pillar, metal wires hanging above, namely for catenary, it also can be regarded as an electrified railway artery.,电气化铁路简介,接触网是向电力机车直接输送电能的设备。沿着铁路线的两旁，架设着一排支柱，上面悬挂着金属线，即为接触网，它也可以被看作是电气化铁路的动脉。,电气化铁路简介,By using the roof of electric locomotive from catenary gain power electric bow, traction train operation.According to the type of traction power supply system have dc current contact system and communication system has two kinds. 电力机车利用车顶的受电弓从接触网获得电能，牵引列车运行。牵引供电制式按接触网的电流制有直流制和交流制两种。,电气化铁路简介,Dc system are in high voltage, three-phase power will be after rectifying buck and traction substation to catenary, for dc, this is one of the earliest current development system, to the 1950s already use less after. 直流制是将高压、三相电力在牵引变电所降压和整流后，向接触网供直流电，这是发展最早的一种电流制，到20世纪50年代以后已较少使用。,电气化铁路简介,Communication system is will high pressure, three-phase power in substation buck and become single-phase, to the catenary for alternating current. 交流制是将高压、三相电力在变电所降压和变成单相后，向接触网供交流电。,电气化铁路简介,Communication power supply voltage of higher, fast development. Electrified railway traction power supply in the format from the start, the single-phase power frequency (50hz) 25 kv communication system, the choice to the de