Abb traction rectifiers 3 traction power supply is one of the most important parts of the transport infrastructure. Electric traction system requirements, terms, advantages. Us55680a fault detection system for electric automobile. The shortcircuit terminal is activated when there is an immediate danger, for example, if. Ppt electric traction system powerpoint presentation free. Application of electric spring in traction train auxiliary.
For applications in dc electric traction the naturally cooled silicon diode rectifiers are the most. Sep 11, 2016 if the electric energy is use in this process is called electric traction. There are not many suppliers of this traction system. Dependence of traction force, braking force and power factor on the speed 3 results of measurement the results of measurements in electric traction power supply ets plase are presented and analysed subsequently.
Electric traction supply system on indian railways rail transport. Thomas davenport, in brandon, vermont, erected a circular model railroad on which ran batterypowered locomotives or locomotives running on batterypowered. There are many other voltage systems used for railway electrification systems around the world, and the list of current systems for electric rail traction covers both standard voltage and nonstandard voltage systems. Basic notions for the study of electric traction systems 17. The locomotion in which the driving force is obtained from electric motor is called the electric traction system. The electric traction system ppt briefly discusses the types, supply system, traction motors, braking system, advantages and disadvantages and recent trends. Speed time, distance time and simplified speedtime curves, attractive effort for acceleration and propulsion, effective weight, train resistance, adhesive weight, specific energy output and. Locomotives rolling stock system power supply system information system high speed railway lrt electric bus epc project management. Using the cophase power supply technology in traction substations, the phase split at the exit of a.
Traction system for urban, suburban and main line transport developed over the period are at 750v dc, 1500v dc, 25kv ac, 2x25kv and 50kv ac. Chapter 1 railway electrification system chapter 2 traction power network chapter 3 railway electric traction chapter 4 electric locomotive chapter 5 pantograph rail chapter 6 electric multiple unit chapter 7 trolley pole chapter 8 third rail chapter 9 overhead lines chapter 10 groundlevel power supply. Energy storage for traction power supply systems 30 circuit configuration fig. Traction system which do not involve the use of electricity such as steam engine drive, ic engine drive etc. For the step potential circuit, we have two feet in series, the contact resistance r1 is, therefore, equal to 6.
Impact of contact line systems on interference and danger voltages in telecommunication, signal and control circuits and equipment. The invention relates to an at traction power supply system of a 27. Electric traction basic, traction types, advantages, control for traction. While diesel locomotives burn petroleum, electricity can be generated from diverse sources, including renewable energy. A traction system that doesnt use electrical energy for the movement of vehicle at any stage is referred as non electric traction system.
These systems of tractions may be classified broadly into groups namely. The measurements were made into an ac railway electric traction substation of 27 kv, during more. Promising pace of development of rail infrastructure in a number of countries across the globe and increase in the demand for faster commuting networks have helped the market gain momentum over the. How electric train gets an electric supply electric.
Toyo denki began supplying electrical equipment for electric locomotives and diesel electric. Design of power supply system in dc electrified transit. Electric and magnetic fields under contact lines and in proximity of the traction power installations. Pdf analysis of electric powers parameters in supplying of railway. It links the general ac medium voltage supply system and the dc supply line catenary or third rail of the traction vehicles. Pjut2 provides power supply for traction motor blowers, brake resistor blower, transformer oil cooler blower, pump, compressor, hvac and all electric locomotive dc consumers. The supply to the electric traction can be given mainly in two ways. Selection of traction system voltages railelectrica. First, the human body electrical circuit model is developed, and tolerable step and touch potentials derived from ieee standard 80 are defined. The electrical supply is fed to the railway at typically 2kv, 66kv or 33kv and the electrical power is then on larger systems d istributed through a separate ac. 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. A key advantage of the system is that there are no restrictions on where it has to be deployed so it can be installed virtually anywhere.
The steam engine drive is the best example of a non electric traction system and it is the first locomotive system used before the invention of actual electric traction systems. The drive which uses the electric power for moving forward, such type of drive is called an electric traction drive. Act of drawing or being drawn is known as traction. Contents hide 1 why 25kv is used in railway traction system. This will ensure that the electrification supply system is able to provide the required power levels to fulfil the performance of the traction units. It offers several benefits over other systems, including quick start and stop, very efficient, pollution free, easy to handle and easy speed control. Classification of insulating materials for electrical machinery and apparatus in relation to their thermal stability in service.
As the protected components of the electrical systems have changed in size, configuration and their critical roles in the power system supply, some protection aspects need to be revisited i. System such a diesel electric drive, electric drive etc. Many traction systems have been developed over the period depending on dominant technologies at that time and traffic demand. Voltage fluctuation of auxiliary power supply system is a nonnegligible factor threatening the safe operation of traction trains. Traction force, besides the speed, also depends on the excitation current, i. Tiss to deliver replacement electric equipment for taiwan high speed rail. A cophase power supply system is a system that provides power for electrical locomotive and has the same voltage phase across all power supply arms 57. Traction power electrification system investigation wmata. It is free from smoke and flue gasses maintenance cost. Railway technology systems suburban rail, metro and rapid transit railways. Electric trains are those trains which use electric traction or in general electric power.
Dedicated freight corridor project in india thought meant for heavy haul, but the locomotive has to work in dfc and ir territory, therefore, 2x25kv power supply system is chosen. Electric traction download ebook pdf, epub, tuebl, mobi. Introduction driving forward of vehicle is called traction and the system, which employs this type of mechanism is called traction system. Auxiliary power supply system is an important component of traction trains. Reduction on operation voltage can effectively reduce the device ratings and thus the initial installation cost of the traction power supply system. Electric traction the system which use electrical power for traction system i. This chapter presents a general description of the elements that characterize a railway electric transportation systems. These systems store excess regenerative electric power in wayside lithiumion batteries and then supply it to trains that require traction power.
The system which use electrical power for traction system i. Course is helpful for various competitive exams like engineering entrance, pgecet, psu recruitments, ecet, leet etc. Federal transit administration december 9, 2016 8 new insulators that can be removed for cleaning and then reinstalled. Operational and safety considerations for light rail dc. First, a combined cophase traction power supply system is applied at. Click download or read online button to get electric traction book now. Unless the traffic to be handled is heavy, electric traction becomes uneconomical. Calculate ithe time taken and energy dissipated in the motor during starting. Partners in powerful communities the proposed traction power supply system includes a traction power substation tps and transmission connection to the existing adjacent 230 kilovolt kv transmission line. Traction power supply abb traction rectifiers diode. Railway traction system research india publications. Ppt electric traction system powerpoint presentation. Electric traction supply system on indian railways free download as pdf file.
System of electric traction mechanics of train movement. A novel electric traction power supply system using hybrid. Thomas davenport, in brandon, vermont, erected a circular model railroad on which ran batterypowered locomotives or locomotives running on batterypowered rails in 1834. Economic criterions and conditions for railway electrification. Electric traction means using the electric power for traction system i. The device of claim 1, wherein the comparator compares the summed signal to a second reference signal which is proportional to the traction battery voltage and outputs the fault signal in response thereto when an electrical path exists between the chassis and the traction battery, wherein the first reference signal is a positive threshold limit signal and the second reference signal is a. Download free sample and get upto 51% off on mrprental. Open library is an initiative of the internet archive, a 501c3 nonprofit, building a digital library of internet sites and other cultural artifacts in digital form. Tiss to supply 68 units of electric locomotives to taiwan railways administration.
Jan 08, 2019 electric traction means using the electric power for traction system i. Jan 29, 2015 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. Pdf this paper presents the status of the entire supply system of railway. Jul 31, 2014 1 what are the requirements of an ideal electric traction system. Non electric traction system mechanical traction system. A railway electrification system supplies electrical energy to railway. The electrification of railway in indian is started in 1925 as it is free from. This site is like a library, use search box in the widget to get ebook that you want. There are various system of electric traction existing such as electric train, trolley buses, diesel electric vehicles and gas turbine electric vehicles. The permissible range of voltages allowed for the standardised voltages is as stated in standards bs en 50163 and iec 60850. Three key techniques used in this system have been discussed.
Electric traction will continue to play a dominant role in the railway since it is an. At each traction substation, normally two single phase transformers are installed, one which is in service and the other is 100% stand by. The 2nd part introduces the simulation model built for the purpose of the study. May 22, 2018 the electric traction system ppt briefly discusses the types, supply system, traction motors, braking system, advantages and disadvantages and recent trends. Nov 30, 2015 the electric traction system is the most efficient of all other traction system such as steam and internal combustion ic engine type systems. Electric traction railways electric motor components. Or electric traction means a locomotion in which the driving force is obtained from electric motors. One of the major application of an electric drive is to transport men and materials from one place to another. Cn101462501b at traction electric power supply system of 27.
Some electric traction systems provide regenerative braking that turns the trains kinetic energy back into electricity and returns it to the supply system to be used by other trains or the general utility grid. Why 25kv is used in railway traction system electrical4u. This paper based on electric spring theory aims to stabilize the voltage of the critical load in traction train auxiliary power supply system. The main reason for 25kv voltage used in railway is, that 25 kv. Traction power electrification system investigation report washington metropolitan area transit authority. Nowadays, electric traction is most widely used in all countries because electric traction has many advantages compared to diesel engine trains such as reduce pollution, reduce noise, etc. The project is subject to provincial environmental assessment act approval in accordance with the class environmental assessment for minor transmission facilities, as a. Electric traction systems seminar report a traction system causes the propulsion of vehicle in which tractive or driving force is obtained from various devices such as diesel engine drives. Supply of the 2x25 kv system from the 1x25 kv system. Traction motors are used in electrically powered rail vehicles such as electric multiple units and electric locomotives requirements of an ideal traction system. In ohe, or overhead electrification systems, the supply of electricity is through an overhead system of suspended cables known as. The track electrification refers to the type of source supply system that is used while powering the electric locomotive systems. A 2200v,50 hz, three phase,6 pole,yb connected squirrel cage induction motor has following parameters. New generation traction power supply system and its key.
A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives, electric or hydrogen vehicles, elevators or electric multiple unit traction motors are used in electrically powered rail vehicles electric multiple units and other electric vehicles including electric milk floats, elevators, roller coasters, conveyors, and trolleybuses, as well as vehicles with. Power supply installation in electric traction irieen. If electric supply is used for driving a locomotive, the system is known as electric traction. Now a day, magnetic traction is also used for bullet trains. The most vital factor against electric traction is the initial high cost of laying out overhead electric supply system. Power failure for few minutes can cause traffic dislocation for hours.
Introduction traction motor refers to an electric motor providing the primary rotational torque of a machine, usually for conversion into linear motion traction. Traction power supply system class environmental assessment. Modern electric traction get best books pdf, study. Developed to improve the energy efficiency of trains by making use of the regenerative electric power they. The locomotive should be selfcontained and able to run on any route braking should be such that minimum wear is caused on the brake shoes if possible the braking energy should be regenerated and returned to the supply.
660 476 826 139 921 1002 785 571 896 427 664 1073 726 442 1401 1244 93 1095 1206 1114 146 1441 1014 1559 1065 1443 453 1027 565 34 240 1138 713 1222 428 862 222 1006 101 38 1189 575 604 315 1305 1093 841 1374 937 460 383