This article discusses all aspects of elec tric power supply systems for railways, ranging from the history of electrification of japanese railways to todays sophisti. Railway technology today 3 edited by kanji wako 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 major elements of a railway signalling power system are the power sources, the distribution network and electrical loads sometimes referred to as currentusing equipment. The railway system division, in its commitment to future progress, has consistently achieved technological breakthroughs on three systems that are shaping the future worldwide. Allows the reader to deepen their understanding of various technologies for both fixed power supply installations of railway systems and for railway rolling stock this book explores the electric railway systems that play a crucial role in the mitigation of congestion and pollution caused by road traffic.
Simulation of railway power supply systems openpowernet. Electric railways, as an environmentally friendly and efficient. Hog system is considered to be the most economical for the reason the cost of generation is minimum, but the issue is that the head on locomotive is not wedded to the train. Choosing the right transformer for your model trains. The electrical load flows and the energy consumption within railway power supply networks depend on the running trains and the power supply system characteristics. Traction power electrification system investigation wmata. Third rail is more compact than overhead wires and can be used in smallerdiameter tunnels, an important factor for subway systems. This book explores the electric railway systems that play a crucial role in the mitigation of congestion and pollution caused by road traffic. Design of power supply system in dc electrified transit railways. If for some reason, it is detached, there is no source of power, therefore, one power car has to remain in the system. This paper presents the status of the entire supply system of railway electrification. Sep 20, 2014 3 the idea can be applied in several ways to provide a traction power based electrical power supply system for the utilities. Hong kong mass transit railway power supply system.
Why do indian railways use 25 kv ac supply instead of the. Traction power facilities california highspeed rail. Operational and safety considerations for light rail dc traction electrification system design kinh d. Traction power supply simulation system of urban rail transit in the paper, the train traction calculation and dc traction power supply simulation are used to analyze the operation process of the train on traction power supply system, the changes of speed, power, position and voltage of. Pdf energyefficiencyofrailtransportpowersupplysystem. Power system layout of wagons for reefer container transport as previously stated, the electrical energy for powering reefer containers is provided by the supply vehicle the locomotive and is distributed to wagons through the train busbar. Railway power supply system models for static calculations in a modular design implementation usabilityillustratedbycasestudiesofnorthernmalmbanan ronnyskogberg masterofsciencethesis royalinstituteoftechnology schoolofelectricalengineering electricpowersystems stockholm,sweden,20 supervisors.
This is a topical issue that is being debated within the railway community which on the one hand wants to modernize its power supply systems. Railway technology today 3 edited by kanji wako railway. On the use of graph theory for railway power supply. For this reason the idea was to create a plugin simulation module for railway power supply networks using the advantages of an existing commercial railway operation simulator. In three rail systems, the outer rails are both grounded, and the center rail is hot. Railway electrification has many advantages but requires significant capital expenditure for. Railway power supply system models for static calculations in a modular design implementation usabilityillustratedbycasestudiesofnorthernmalmbanan. Railway transportation systems for a comfortable future. Since, lot of changes have taken place in the field of power supply installation, it has become necessary to incorporate the changes in this volume. Case study bernmobil railway power supply systems english pdf reference case study case study wiener linien railway power supply systems english pdf reference case study delhi metro rail corporation limited dmrc phase 1,new delhi, india turnkey electrification solution english pdf reference case study.
The railway power supply system also uses a singlephase design to transfer power to the. A novel power flow algorithm for traction power supply systems. Railway power supply system models for static calculations in a modular design. By allowing the operation of a large railway system to be simulated on a personal computer. Openpowernet simulation of railway power supply systems. Pdf several different type of railway traction electric power system configurations have been used in the usa and all over the world.
The track electrification refers to the type of source supply system that is used while powering the electric locomotive systems. Electrical railway transportation systems wiley online books. Railway power supply voltage systems originating from the beginning of the 20th century, four major railway power supply system exist. Analysis of energysaving strategies in railway power. With this model even if one unit fails the other power supply will keep the system working. Current ac electrified railway tractive power supply system mainly adopts direct feeding system, bt power supply mode and three kinds of power supply modes of at power supply mode. Secondly, this research provides railway risk assessment methods, based on the combination of fmea and fta, to assess all of the potential hazards that threaten the. The railway power supply system also uses a singlephase design to transfer. Operational and safety considerations for light rail dc. The supply authorities supply power at 220211066 kv extra high voltage ehv at each traction substation which is owned, installed, operated and maintained by the railways. Paper open access the modeling and simulation of dc.
However, the minimum voltage is higher to ensure the power supply. The ehcs is made up of a smallcapacity railway static power conditioner rpc and a largecapacity magnetic static var compensator msvc. The typical pq problems in highspeed railway hsr are the unbalance, reactive power, harmonic. The newly developed energy simulation module called openpowernet works. Our experienced engineers are also there to provide consultation and offer customeroriented solutions. Railway applications power supply and rolling stock technical criteria for the coordination between power supply substation and rolling stock to achieve interoperability required by directive 200857ec. These technologies are already available, but there is a need of analyzing their. Jan 19, 2016 to achieve economical compensation for the hugecapacity negative sequence currents generated by highspeed railway load, an electromagnetic hybrid compensation system ehcs and control strategy is proposed. For decades, abb has supplied worldwide traction power supply systems to deliver power to the line and power to the supporting infrastructure.
According to the requirement of railway power supply system, nr delivers practical and reliable overall solution, including traction power supply system, power dispatch. Railway power supply system models for static calculations in. Railway power supplies should ensure uninterrupted functioning, reliable and safe electric vehicle traction. Railway power supply system models for static calculations.
Dc 3 kv was introduced in the twenties, to increase the range. In the most frequently used system, the railway electricity power is supplied from the public high. Electric railways use either electric locomotives hauling passengers or freight in separate cars, electric multiple units passenger cars with their own motors or both. In contrast to public energy distribution systems there are moving energy consumers with a timedependent power demand picking up and recovering. Internal power supply distribution system iii energy efficient systems. Paperiv lars abrahamsson and lennart soder, an sos2based moving trains. Dc traction power supply mv switchgear for railway power.
A railway electrification system supplies electric power to railway trains and trams without an onboard prime mover or local fuel supply. In this paper the methods of electrification supply system are discussed which are direct current supply. Our shared objectives are to provide a safe and accessible railway power supply solution for onboard power systems. Financial viability of different systems of power supply. Design of power supply system in dc electrified transit railways influence of the high voltage network denis seimbille kth royal institute of technology electrical engineering. The system which use electrical power for traction system i. Apparatus which helps boost the ocs voltage and reduce the running rail return current in the 2 x 25 kv autotransformer feed configuration. English pdf leaflet abb dc railway infrastructure line card english pdf leaflet enviline dcgear brochure english pdf brochure enviline aru automatic receptivity unit english pdf brochure enviline ers energy recuperation system english pdf brochure enviline ess energy storage. Openpowernet simulation of railway power supply systems prof. The tes for a typical modern light rail or street car system includes an overhead contact system ocs, traction power substations and feeder cables, together with associat ed substation protective. Railway signalling equipment power system earthing rail. A hybrid railway power conditioner for traction power. Power supply system of indian railway coaches railelectrica. Operational and safety considerations for light rail dc traction electrification system design.
Voltage levels normally follow the catenary systems below 36 kv. Power system layout of wagons for reefer container transport as previously stated, the electrical energy for powering reefer containers is provided by the supply vehicle the locomotive and is. Pdf railway electrification systems and configurations. There are two classes of the coaches called conventional and lhb being manufactured at. Railway engineering is a multifaceted engineering discipline dealing with the design, construction and operation of all types of railway systems. Federal transit administration december 9, 2016 8 new insulators that can be removed for cleaning and then reinstalled. Modelling of rail traction and power distribution systems. Modelling of rail traction and power distribution systems derek smith business development director daniel ting senior power engineer etap automation. Head on generation hog a step towards energy efficiency. Third rail systems can be designed to use top contact, side contact or bottom contact. Indian railways have 46,038 various types of coaches excluding emus and memu coaches and around 3000 of new coaches are being added annually to the system. It can be used as an energy prognosis and analysis tool as well as for the planning and optimisation of power supply installations. Pdf railway electrification is experiencing a very important transformation process today.
Ltk engineering services n overview is presented of an integrated approach to operational and safety issues when. Our inhouse simulator is able to calculate various railway system conditions with remarkable accuracy. Here the reason for transmitting voltage at 25 kv and not normal 240415v or other ht supply are. The power supply voltage is often transformed down to a lower voltage to minimise voltage drop when distributed over longer distances. Abstract urban rail systems such as subways and trams transport millions of people every day, o ering a high level of service. In this system, the current is mainly carried between the overhead line and a feeder transmission line instead of the rail. The book on power supply installation in electrical traction was brought out by institution of railway electrical engineers iree long back. The railway receives 3phase power supply from the supply authority at a single point near the grid substation from where the railway runs. These systems still require a power supply but it only needs to supply a constant voltage to the rails. The phase i of california highspeed train project chstp to be implemented between san francisco and anaheim will be a 520 routemiles long stateoftheart rail system providing intercity travel with modern highspeed trains running at speeds up to 220 miles per hour. The present invention relates to a kind of electric railway at tractive power supply system. The electrical load flow within railway power supply networks and the train energy consumption depend both on the running trains and the power supply system characteristics. Power supplies for railway applications on the rails to 2020. In this paper the methods of electrification supply.
Our product portfolio includes traction substations that feed and distribute power to the lines. A hybrid railway power conditioner for traction power supply. The nonlinear and dynamic natures of the modern trains make the calculation and evaluation of such power quality pq problems quite a di. Optimal electromagnetic hybrid negative current compensation. The accuracy of the simulation was verified by a large number of real time measurements. A proposed node model, for the static parts of a railway power system, has been used to simplify.
Pdf hong kong mass transit railway power supply system. There are several different electrification systems in use throughout the world. A power supply system for the railways must provide electricity to locomotives and multiple units for traction so these units can operate without having an onboard storage of energy, like diesel or steam engines. A description of the design parameters may be found in the california highspeed train project basis of design report. How to choose the right transformer for your model trains understanding electrical supplies and controls. Likewise, we execute the specifications for all the onboard electrical components, traction system, control, auxiliary power supply, communications. Railway power system provides power supply for the stations along the railway and vehicles control system and it is directly related to the safe running of the locomotive. For any system that depends on sophisticated electronics, everything begins with the power supply. Powerelectronics issues of modern electric railway systems. The new developed energy simulation module called openpowernet works together. These are mostly used in mission critical application or at important places like airports, refineries, railway station etc. The power supply network is composed of a high voltage network fed with ac linked to a traction network fed with dc by traction substations.
A leader in railway systems our compact and lowweight transformers fully comply with the customers specifications. The highest voltage is same for indian railways and shinkansen. Design of power supply system in dc electrified transit. The first main objective of this article is to classify and describe the principal electrical railway power supply systems existing and the most important proposals for their improvement found in the literature. The calculation of the various parameters forming the whole system, from the power substation, through the catenary, trolley, rail and feeder line, to the train, were gotten from. Optimal railroad power supply system operation and design. Cn101462501b at traction electric power supply system of 27. I hope that the information given in this handbook will improve the knowledge of signal personnel and help them in maintaining the power supply system.
The voltage situation as well as the network structure influence the. The first main objective of this article is to classify and describe the principal electrical railway power supply systems existing and the most important proposals for their improvement found in. A hybrid railway power conditioner for traction power supply system ningyi dai, kengweng lao, manchung wong electrical and computer engineering department university of macau macau, p. To become the reliable power partner has been the motivation for mean well to grow continuously. The electrical load flows and the energy consumption within railway power supply networks depend on the running trains and the power supply system.
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