Electricity is typically generated in large and relatively efficient generating. The electric traction system 25 kv, 50 hz and the traction vehicle with threephase induction motors were modeled including acdc rectifier and dcac inverter based on igbt technology. Railway electrification as a means of traction emerged at the end of the nineteenth century, although experiments in electric rail have been traced back to the midnineteenth century. What is an electric locomotive systems and their types in. Briefly described, an electric railway is a combination of a source of electric energy, means for transmitting it to vehicles along a right of way, including the raising and lower ing of electrical pressures and conversion of type of current, and motors on the. Energy saving technologies in the railway vehicle traction field can be mainly. Passenger activity split by traction type, 2005 and 2009.
Like any largescale engineering system, design, operation and planning of traction power systems rely heavily on computer simulation. Distribution of the traction return current in at electric railway systems article in ieee transactions on power delivery 203. Design and testing of 25 kv ac electric railway power. Sprague tram at industrial exhibition in ueno, tokyo the railway museum. New generation traction power supply system and its key. In an electric traction system the driving force to pull a train is generated by the traction motors. On electrifications, technologically strong solutions were implemented until ones with. Powerelectronics issues of modern electric railway systems. Italian railways were the first in the world to introduce electric traction for the entire length of a mainline rather than just a short stretch. Share of electrified versus nonelectrified railway lines, 19902009 fig.
Railway and electric traction history is closely linked with the electrotechnic development rhythms, in particular transformers, motors and semiconductors. Railway traction system research india publications. Hence, it is possible to achieve higher acceleration of 1. Advantages of ac traction systems it is possible to use regenerative braking in electric traction system. The motors used in electric traction have a very high starting torque.
If you continue browsing the site, you agree to the use of cookies on this website. Electric railways use either electric locomotives hauling passengers or freight in separate cars, electric multiple units passenger cars with their own motors or both. Fashion, politic or strategic choices also influenced notably the evolution of electric traction. Also, measurements of electrical and magnetic fields inside the traction substation and in its vicinity were undertaken. Electric traction 1701 however, the steam locomotive suffers from the following disadvantages. The railway system division, in its commitment to future progress, has consistently achieved. Features of mitsubishi electric hvigbt modules for railway traction inverters and power transmission. Electricity has been the major source of power in most railway systems. A traction motor and bogie are preserved at the railway museum in saitama prefecture. Economy of operation with electric motorcar trains is higher thanwith any other scheme of operation yet offered in railroading. This ppt helps to understand the concept of electric traction slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.
Poor power quality affects the performance, reliability of the railway system as well as having an effect on equipment attached to the local distribution network. Thomas davenport, in brandon, vermont, erected a circular model railroad on which ran batterypowered locomotives or locomotives running on batterypowered rails in 1834. A book for students, electrical and mechanical engineers, superintendents of motive power and others. Railway transportation systems for a comfortable future. Unlike the traditional traction power supply system which enables the electrified railway traction substation to be connected to power grid in a way of phase rotation, a new generation traction power supply system without phase splits is proposed in this paper. A railway electrification system supplies electric power to railway trains and trams without an onboard prime mover or local fuel supply. Published by traction orange company, wheaton, il 1966.
An electric locomotive is a locomotive powered by electricity from overhead lines, a third rail or. Its primary side is connected with two phases of the threephase power grid. Arrivals of locomotive at substation are dynamic load. Although experimental electric motors were built more than a century ago electric traction is a modern development.
Developments in traction systems university of birmingham. Reliable, efficient and safe power distribution to the trains is vitally important to the overall quality of railway service. A railway electrification system is the infrastructure that allow electric traction to operate. Electric railway traction systems and techniques for. First, a combined cophase traction power supply system is. Railway traction, reliability and safety in railway, xavier perpinya, intechopen, doi.
The railway electrical distribution network used to provide energy to highspeed electric trains, which comprises of the following three types of traction power facilities in addition to connections to the ocs and the traction return. A fully electrified railway has no need to switch between methods of traction thereby making operations more efficient. Introduction classification electric traction railway traction third rail system overhead system traction is defined as. Abb is the expert for traction converters, motors, transformers. The motor was by ge of the usa and the bogie was also american. Indian rail uses only two phases from threephase electric power supply to fed locomotive. Ingeteam is a market leader specializing in electrical engineering and the development of electrical equipment, motors, generators and frequency converters. Dc traction dc traction units use direct current drawn from either a conductor rail or an overhead line.
A free powerpoint ppt presentation displayed as a flash slide show on id. Traction power system simulation in electrified railways. Distribution of the traction return current in at electric. A book for students, electrical and mechanical engineers, superintendents of motive power and others interested in the development of electric traction for railway train service electric traction by electric railways for ordinary service. Indian while completing electrification of hwhbardwan section of eastern railway decided to adopt 25 kv system in collaboration with sncf and converted 3000v dc just when it was completed into 25 kv instead running it at 3000 v dc.
Network line lengths and proportion of electrical railway systems 2003 dc 1500 v 15,320 km 6. Three key techniques used in this system have been discussed. Special transformers railway transformers 5 ac traction feeder transformers application ac traction feeder transformers are used between normal threephase ac networks and singlephase catenary systems. Ppt electric traction system powerpoint presentation. Harmonic analysis and modeling of transformerless electric railway traction drives farhad shahnia1,mohammad b. Railway electric traction is about the traction units that operate on a railway electrification system. Review of characteristics of different types of dc and ac motors used traction and their suitability moduleiv 10 hours rating and heating of electric drives, power loss, heating and cooling of motors, classes and duty and selection of motors, drives for. The most popular line voltages for overhead wire supply systems 1500v dc and 3000v dc. The electric traction system can be broadly divided into two groups. Traction transformer is applied to railway as a power supply for electric power train. Optimising power management strategies for railway traction. Electric traction current, car, railway, motor, motors. Railway traction systems alternating current electric.
Power quality analysis in electric traction system with. Single and double voltage systems are used as in autotransformer and booster transformer applications. Electric traction by steam railroads for special situations. In 188g, van depoele, working at minneapolis for the minneapolis,lyndale and minnetonka railvay, which had been obliged to discontinuethe use of steam locomotives in the business portions of the city, equippedan electric locomotive car for hauling trains. First, a combined cophase traction power supply system is applied at. Imho, they are quite different, and both merit separate articles. Responsibility for energy conservation in electrical energy lies with the electric department whereas for diesel oil with the mechanical department of indian railways traction energy. The parameters of those power electronic elements directly determine the current and voltage waveforms, and consequently power quality parameters.
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