Railway electric power feeding systems pdf file

Most of these systems are fed by direct current dc. Alan baxter network rail guide to overhead electrification 2787albguneoh000001 february 2015 rev 10 1 of 52 1. Harmonic and negative sequence components of voltage and current viewed from pcc have been evaluated in several papers 15. Voltage of junction of pantograph and ocs without arrester and the surge at point b 0. The investigation of overvoltage transient processes in railway electric power feeding systems conference paper pdf available june 2012 with 145 reads how we measure reads. Pdf several different type of railway traction electric power system. Unlike these countries, the 2 kv traction current grid covers only part of the country, approximately north of stockholm. Each power car is installed with 2 diesel alternator da sets generating 3phase 4 wires power supply of 750 volts 50 hz and the same is transmitted to entire rake through two parallel cables feeders termed as feedera and feederb, running through the whole length of the train. Separate from the 2 kv grid is a 30 kv line connection between mon and. Iet power electronics, issn 17554535, eissn 17554543 article in journal refereed in press abstract en the railway power supply systems in many sparsely populated countries are relatively weak. In turn, this displacement of the first and second plates facilitates the cogeneration of electrical energy from the kinetic and potential energy of the. Electric power supply systems in railway networks have as their main function to perform electric traction. The use of low frequency requires that electricity be converted from utility power by motorgenerators or static inverters at the feeding substations, or generated at. At some stations with large yards, alternate feeding arrangements are provided so that the power for feeding and yards may be drawn from alternate routes.

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. Svc light2 benefits the power grids feeding railway systems by. Formerly, the porjus hydroelectric power station provided electric power to the traction network. Head on generation hog a step towards energy efficiency. In ac power feeding systems, the sections of track feed by each substation are separated by dead sections, with excess regenerative electric power from the rolling stock on each ac feeder section being fed back into the power system. Electric power technology in the railway industry refers to the means of supplying goodquality electric power to the electric motors. The right choice of the feeding system is decisive for the development of more competitive. The railway system division, in its commitment to future progress, has consistently achieved technological breakthroughs on three systems that are shaping the future worldwide. Furthermore, the traction systems used in rolling stock are achieving higher levels of performance and they are being made more efficient, smaller, lighter, and reliable through improvements in motor efficiency and advances in power devices, the core technology. The analysis of lightning on urban railway fed with direct current overhead power supply 25th international power system conference 3 as shown in the fig. Railway transportation systems for a comfortable future. Coordination of surge arresters in dc 3 kv railway traction.

Electrical power generation system using railway track pdf ppt. A free powerpoint ppt presentation displayed as a flash slide show on id. Jun 18, 20 dc traction units use direct current drawn from either a conductor rail oran overhead line. The unbalance has undesirable effects on the generators of the supply authorities and equipment of other consumers. Feasibility study of superconducting power cables for dc. Power quality analysis in electric traction system with three. The power cogeneration system includes first and second electrical capacitance portions that are electrically coupled to the power source and that are configured to carry positive and negative charges, respectively. For ac railway power supply systems with a different frequency than the public grid, highvoltage ac hvac transmission lines. Conductor rail systems offer a robust and unobtrusivemeans of powerdelivery.

Power quality analysis in electric traction system with. Investigation of power factor behavior in ac railway system. The permissible range of voltages allowed for the standardised voltages is as stated in standards bs en 50163 and iec 60850. If the bilateral power supply is improved, the reliability and power supply capability could be im. Green house feeding has the objective to provide cultivators globally with the highest quality plant nutrients enabling them to achieve unprecedented results by allowing plants to develop to their full genetic potential. Power collection via the overhead line and pantograph, introduced nearly 100 years ago early in the history of electric railways, remains basically unchanged in. Power interchange system for reuse of regenerative. Compared to other modes of transportation such as cars and aircraft, railway systems impose a low load on the environment. The choice of 25 kv was related to the efficiency of power transmission as a function of.

For studying the load flow analysis of the traction power distribution systems, the power consumption of the train. Technical achievement and outlook in fy2015 industrial. Power and lighting panelboards and motor control centers types of lighting systems installation methods power monitoring systems electric utility requirements trends in systems design there are many new factors to consider in the design of power distribution systems. Up to now, electricity has always been the main type of energy for urban rail systems1 because it is the. Research on voltage losses of at traction power supply. World railway electrification systems table 1 shows various feeding systems. This is formally only valid in vicinity of the linearization point. In the future the alvkarleby hydroelectric power station may be connected to the traction network, as this would increase stability of the power grid of the railway system. The railway receives 3phase power supply from the supply authority. California high speed train project utility power supply, r1 page 4 1. This electric power supply is tapped at each coach through a 50 kva. Development of lightweight traction systems to reduce. You will come to understand power transmission, railway infrastructure and traction systems. In this paper, the effects of the traction vehicle operation with threephase induction motors on power quality in a 110 kv transmission network are investigated.

Railway technology today 3 edited by kanji wako railway. It involves utilization of electric power for traction systems i. It primarily consists of power conversion technology at substations, feeding circuits for dc and ac feeding. Urban rail systems such as subways and trams transport millions of people every day, o ering a high level of service. Electric traction is meant for locomotion in which the driving tractiveforce is obtained from electric motors called as traction motors. Pdf railway technology today 3 edited by kanji wako.

Optimising ac electric railway power flows with power electronic control by thanatchai kulworawanichpong a thesis submitted to the university of birmingham. Traction power 2x25kv autotransformer electrification system, r2. This guide covers copper and aluminum conductors from no. Applications of power electronics in railway systems. Electrified railway traction power supply system is directly powered by 110 kv or 220 kv some. Design of power supply system in dc electrified transit.

Ppt electric traction system powerpoint presentation free. Generally speaking, an electric railway power supply system rpss di. The railway electrification load is one of the most difficult kinds of load to be fed by an. Customary units consistent with guidelines prepared by the california department of transportation and defined by the national institute of standards and technology nist. To meet requirements at electric loco running sheds, isolators. There are two types of traction power supply systems in poland. Electrical power generation system using railway track final year mechanical engineering project with pdf and ppt. Paperiv lars abrahamsson and lennart soder, an sos2based moving trains.

Application of linear analysis in railway power system stability studies s. Although this guide includes specific recommendations, it is impossible to cover all possible design, installation, and operating situations for every application. Electrical power is availed from local electricity board at 11kv33kv volts which is stepped down to 440 volts and 230 volts for feeding three phase and single phase supply at substations to various types of loads. Abb powers rail traffic in france background information abb and the railway industry. However, the power factor has not been analyzed focused sufficiently in the electrical railway systems as a power quality index. The system includes a power source, such as a power generation device or an external power source. Our product portfolio includes traction substations that feed and distribute power to the lines. These mechanism carries the flap, rack and pinion, gears, freewheel, flywheel, dc generator, battery. Voltage at cableocs junction without arrester and the surge at point b ms fig. The single phase traction load causes unbalance in the supply system. At these facilities, the other terminal of the autotransformer is connected to a catenary section or sections, via circuit. Investigation of power factor behavior in ac railway.

It primarily consists of power conversion technology at substations, feeding circuits for dc and ac feeding systems, and the structure, materials, measurement, and maintenance of the electric overhead lines. List of installations for 15 kv ac railway electrification in. Youll focus on designing real control systems and embedded systems. Railway electric power feeding systems yasu oura, yoshifumi mochinaga, and hiroki nagasawa introduction electric power technology in the railway industry refers to the means of supplying goodquality electric power to the electric motors. The integrity of power supply by automatic changeover system and power system protection system will also be introduced. The power supply system includes all installations necessary for electrical traction. Design of power supply system in dc electrified transit railways influence of the high voltage network denis seimbille. Pdf railway electrification systems and configurations. Svc light for railway load balancing the growth of train traffic and the increased speed of trains in france is resulting in deterioration of power quality in the electric power systems feeding the railways. Youll extend your technical understanding and learn how to apply your knowledge and creativity to solving electrical and railway engineering problems. These systems of tractions may be classified broadly into groups namely. The parameters of those power electronic elements directly determine the current and voltage waveforms, and consequently power quality parameters. One method proposed for overcoming this problem is a sectioning post railway power conditioner sprpc system for reducing total electricity purchases from the grid that works by using rpcs designed for installation at sps where power feeding equipment is housed to supply regenerative electric power generated under regenerative braking by. The electrical power system feeding the railway should be designed so the voltages at the train sets are in the.

Head on generation hog a step towards energy efficiency o. Design of power supply system in dc electrified transit railways. Power interchange system for reuse of regenerative electric. The types of polish railway electric traction power supply systems in poland there are nearly 20 000 kilometers of railway. To introduce the different configurations of railway power supply and overhead line system 2. Ppt electric traction system powerpoint presentation. The generation and transmission systems of supply authorities are 3 phase systems. Pdf the investigation of overvoltage transient processes in. Fosso department of electric power engineering, norwegian university of science and technology, trondheim, norway abstract dynamical phenomena, such as oscillations and instability in railway power systems, have become of growing concern. The analysis of lightning on urban railway fed with direct. However, when electric locomotive passes through the device, the overvoltage and overcurrent frequently occur, as well as the electric railways reliability and the speed of electric locomotive is affected.

A common way to describe a linear or linearized system is by a state space model as in eqn. For traction purposes mostly 3phase induction motors and d. Application of linear analysis in railway power system. Railway electric power feeding systems pdf free download. Research on voltage losses of at traction power supply system. Optimal railroad power supply system operation and design detailed system studies, and aggregated investment models. The design of the power supply network of dc electri ed transit railways is of great importance and requires the use of simulation models. The main focus of this arrangement is the harvesting large amount of power from railway track which can be used to power the track. Electric railways use either electric locomotives hauling passengers or freight in separate cars, electric multiple units passenger cars with their own motors or both. Auxiliary power supply is a low voltage acdc power supply for. The types of polish railway electric traction power supply systems in poland there are nearly 20 000 kilometers of railway tracks, most of which are electrified by overhead traction system with nominal voltage of dc 3 kv direct current power supply. This is the case in particular for voltage unbalance, produced by singlephase connection of railway substations to the national threephase. Traction power 2x25kv autotransformer electrification system, r2 feeding points, and is connected to one terminal of an autotransformer in the traction power facilities via a circuit breaker or disconnect switch. The california highspeed rail chsr line will be an electrified line with traction power for electric vehicles being supplied and distributed using a 2x25kv autotransformer feed type power supply system and an overhead contact system.

Optimal railroad power supply system operation and design. A superconducting power cable has merits of a high power transmission capacity, transmission losses reduction, a compactness, etc. At the system design of railway electrification systems we combine the calcula. The most popular line voltages for overhead wire supply systems 1500vdc and 3000v dc. The integrity of power supply by automatic changeover system and power system protection. A railway electrification system supplies electric power to railway trains and trams without an onboard prime mover or local fuel supply.

System such a diesel electric drive, electric drive etc. Louissan francisco railway, springfield, missouri business equipment manufacturers association. Railway electrification systems using alternating current ac at 25 kilovolts kv are used. The analysis of lightning on urban railway fed with direct current overhead power supply 25th international power system conference 4 ms fig. Railway power supplies should ensure uninterrupted functioning, reliable and safe electric vehicle traction. Normally the switch is locked in one position, being changed to the other when required after taking necessary precautions. This article discusses all aspects of electric power supply systems for railways. List of installations for 15 kv ac railway electrification. Electrical and railway engineering meng university of. Two types of traction power supply systems dc 3 kv with different connection of conductive parts and spd to the return circuit. Simulation of railway power supply systems openpowernet. These two systems reflect the two predominantconductor configurationsfor railwayelectrification. 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. California high speed train project traction power 2x25kv autotransformer electrification system, r2 california highspeed rail authority page 3 feeding points, and is connected to one terminal of an autotransformer in the traction power facilities via a circuit breaker or disconnect switch.

Electrical network structure feeding sections, feeding points, switching. This chapter presents a general description of the elements that characterize a railway electric transportation systems. 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. Much of the electric energy used by railways is actually drawn from the national grid. Weak railway power supply systems causes problems with power quality, voltage drops, and high transmission losses. Pdf applications of power electronics in railway systems. Magnetic field of an ac electric traction power installation magnetic field. Usa 5 tan dar d d r aft n g p rae t c e s electrical and electronics diagrams usas y14. Electric railways in sweden are powered from a singlephase ac supply of 15 kv at 16 2. View and download lincoln electric power feed 10r technical specifications online. Pdf the investigation of overvoltage transient processes. Over the next decades, billions of euros will be invested in infrastructure which encompasses track, 1 agv is the generic name of highspeed trains manufactured by alstom, while tgv is an sncf trademark.