The supply to the electric traction can be given mainly in two ways. The shortcircuit terminal is activated when there is an immediate danger, for example, if. There are not many suppliers of this traction system. 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. A 2200v,50 hz, three phase,6 pole,yb connected squirrel cage induction motor has following parameters. The drive which uses the electric power for moving forward, such type of drive is called an electric traction drive. There are various system of electric traction existing such as electric train, trolley buses, diesel electric vehicles and gas turbine electric vehicles. Introduction driving forward of vehicle is called traction and the system, which employs this type of mechanism is called traction system.
Act of drawing or being drawn is known as traction. Basic notions for the study of electric traction systems 17. Us55680a fault detection system for electric automobile. Railway technology systems suburban rail, metro and rapid transit railways.
Classification of insulating materials for electrical machinery and apparatus in relation to their thermal stability in service. Calculate ithe time taken and energy dissipated in the motor during starting. Electric trains are those trains which use electric traction or in general electric power. The permissible range of voltages allowed for the standardised voltages is as stated in standards bs en 50163 and iec 60850. Electric traction system requirements, terms, advantages. System such a diesel electric drive, electric drive etc. 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. Federal transit administration december 9, 2016 8 new insulators that can be removed for cleaning and then reinstalled. 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. A railway electrification system supplies electrical energy to railway. Traction power supply system class environmental assessment. Traction force, besides the speed, also depends on the excitation current, i. This chapter presents a general description of the elements that characterize a railway electric transportation systems.
Electric and magnetic fields under contact lines and in proximity of the traction power installations. 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. 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. Traction power supply abb traction rectifiers diode. Sep 11, 2016 if the electric energy is use in this process is called electric traction. The electrification of railway in indian is started in 1925 as it is free from. The project is subject to provincial environmental assessment act approval in accordance with the class environmental assessment for minor transmission facilities, as a.
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. 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. 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. Traction motors are used in electrically powered rail vehicles such as electric multiple units and electric locomotives requirements of an ideal traction system. System of electric traction mechanics of train movement. The 2nd part introduces the simulation model built for the purpose of the study.
Many traction systems have been developed over the period depending on dominant technologies at that time and traffic demand. 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. The most vital factor against electric traction is the initial high cost of laying out overhead electric supply system. 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. Locomotives rolling stock system power supply system information system high speed railway lrt electric bus epc project management. Electric traction download ebook pdf, epub, tuebl, mobi. Impact of contact line systems on interference and danger voltages in telecommunication, signal and control circuits and equipment. Unless the traffic to be handled is heavy, electric traction becomes uneconomical. Tiss to deliver replacement electric equipment for taiwan high speed rail. Pjut2 provides power supply for traction motor blowers, brake resistor blower, transformer oil cooler blower, pump, compressor, hvac and all electric locomotive dc consumers. Selection of traction system voltages railelectrica. A traction system that doesnt use electrical energy for the movement of vehicle at any stage is referred as non electric traction system.
May 22, 2018 the electric traction system ppt briefly discusses the types, supply system, traction motors, braking system, advantages and disadvantages and recent trends. These systems store excess regenerative electric power in wayside lithiumion batteries and then supply it to trains that require traction power. Speed time, distance time and simplified speedtime curves, attractive effort for acceleration and propulsion, effective weight, train resistance, adhesive weight, specific energy output and. Now a day, magnetic traction is also used for bullet trains. Supply of the 2x25 kv system from the 1x25 kv system. If electric supply is used for driving a locomotive, the system is known as electric traction. Developed to improve the energy efficiency of trains by making use of the regenerative electric power they. Using the cophase power supply technology in traction substations, the phase split at the exit of a. Click download or read online button to get electric traction book now. It offers several benefits over other systems, including quick start and stop, very efficient, pollution free, easy to handle and easy speed control. The track electrification refers to the type of source supply system that is used while powering the electric locomotive systems.
Electric traction basic, traction types, advantages, control for traction. Ppt electric traction system powerpoint presentation free. 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. The main reason for 25kv voltage used in railway is, that 25 kv. The system which use electrical power for traction system i. It is free from smoke and flue gasses maintenance cost.
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. This site is like a library, use search box in the widget to get ebook that you want. Non electric traction system mechanical traction system. Jul 31, 2014 1 what are the requirements of an ideal electric traction system. 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. Course is helpful for various competitive exams like engineering entrance, pgecet, psu recruitments, ecet, leet etc. At each traction substation, normally two single phase transformers are installed, one which is in service and the other is 100% stand by. The invention relates to an at traction power supply system of a 27.
Energy storage for traction power supply systems 30 circuit configuration fig. One of the major application of an electric drive is to transport men and materials from one place to another. First, a combined cophase traction power supply system is applied at. Operational and safety considerations for light rail dc. Modern electric traction get best books pdf, study. 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.
Pdf this paper presents the status of the entire supply system of railway. Introduction traction motor refers to an electric motor providing the primary rotational torque of a machine, usually for conversion into linear motion traction. Three key techniques used in this system have been discussed. Voltage fluctuation of auxiliary power supply system is a nonnegligible factor threatening the safe operation of traction trains. Jan 08, 2019 electric traction means using the electric power for traction system i. Or electric traction means a locomotion in which the driving force is obtained from electric motors.
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. 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. This will ensure that the electrification supply system is able to provide the required power levels to fulfil the performance of the traction units. Pdf analysis of electric powers parameters in supplying of railway. Thomas davenport, in brandon, vermont, erected a circular model railroad on which ran batterypowered locomotives or locomotives running on batterypowered. A novel electric traction power supply system using hybrid. Ppt electric traction system powerpoint presentation. The measurements were made into an ac railway electric traction substation of 27 kv, during more.
Economic criterions and conditions for railway electrification. This book will useful to most of the students who were studying electrical and electronic engineering. For the step potential circuit, we have two feet in series, the contact resistance r1 is, therefore, equal to 6. Traction system which do not involve the use of electricity such as steam engine drive, ic engine drive etc. Electric traction will continue to play a dominant role in the railway since it is an. 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. Cn101462501b at traction electric power supply system of 27.
First, the human body electrical circuit model is developed, and tolerable step and touch potentials derived from ieee standard 80 are defined. The global traction transformer market size was valued at usd 594. Railway traction system research india publications. While diesel locomotives burn petroleum, electricity can be generated from diverse sources, including renewable energy. 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. Tiss to supply 68 units of electric locomotives to taiwan railways administration. 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. Thomas davenport, in brandon, vermont, erected a circular model railroad on which ran batterypowered locomotives or locomotives running on batterypowered rails in 1834. 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. Electric traction the system which use electrical power for traction system i. The data acquired with the electric powers quality analyzer were registered into a computing system, for their further analysis. Electric traction means using the electric power for traction system i.
Auxiliary power supply system is an important component of traction trains. Which of the following is an advantage of electric traction over other methods of traction. It links the general ac medium voltage supply system and the dc supply line catenary or third rail of the traction vehicles. How electric train gets an electric supply electric. Power supply installation in electric traction irieen. Electric traction supply system on indian railways free download as pdf file. Toyo denki began supplying electrical equipment for electric locomotives and diesel electric. Design of power supply system in dc electrified transit. Electric traction railways electric motor components. Application of electric spring in traction train auxiliary. The locomotion in which the driving force is obtained from electric motor is called the electric traction system. Reduction on operation voltage can effectively reduce the device ratings and thus the initial installation cost of the traction power supply system.
Contents hide 1 why 25kv is used in railway traction system. Traction power electrification system investigation wmata. In ohe, or overhead electrification systems, the supply of electricity is through an overhead system of suspended cables known as. Abb traction rectifiers 3 traction power supply is one of the most important parts of the transport infrastructure. 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. 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. These systems of tractions may be classified broadly into groups namely. Download free sample and get upto 51% off on mrprental. Power failure for few minutes can cause traffic dislocation for hours.
529 1247 1427 420 31 139 171 500 1020 528 666 202 1123 1487 618 768 808 671 115 1413 1229 816 1030 635 1338 149 296 1123 416 819 1018