Traction power electrification system investigation report washington metropolitan area transit authority. However, this is not the only function that track circuits perform in a railway signalling system because the detection information is used also to control train speed and ensure safe. She is an independent expert for a number of institutions and research. Powerelectronics issues of modern electric railway systems. 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. The transmission and distribution network include substations, lines and distribution transformers.
Rail propulsion systems practical rail modernization. In an electrical system, a load with low factor draws more current than a load with high power factor for the same amount of power. Latest system technologies for railway electric cars. Railway technology today 3 edited by kanji wako railway. Traction power 2x25kv autotransformer electrification system, r2. Railway systems planning and operations management meng 6409 project title railway ministation design at minlik square. In an electrical system, a load with low factor draws more current than a load with. Railway electrification provides traction energy to trains. Modeling and simulation of an autonomous railway electrical. Electrical railway transportation systems explores the direct current systems used throughout the world for urban and suburban transport, which are also used in various countries for regional transport. It may take the form of a short insertion in the contact wire or that of an extended. Rail track and associated equipment for use underground in.
Electrical railway transportation systems ieee press series on power engineering. Latest system technologies for railway electric cars overview. The system which use electrical power for traction system i. General by electric traction is meant locomotion in which the driving or tractive force is obtained from. Hitachi is in the forefront in addressing these issues. The earthing system performance should contribute to ensuring electromagnetic compatibility emc among electrical and electronic apparatus of the lowvoltage system in accordance with bs iec 652. Her areas of research include technological, economic, and environmental insights into the development of transport and logistics systems. National highspeed rail networks abb is playing a significant role in the development of highspeed rail electrical infrastructure and rolling stock in most of the worlds highspeed rail networks. Introduction the railway as a means of transport is a very old idea. Ignacio gonzalez franco railway electrical smart grids. 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. Author bios morris brenna, phd, is an associate professor in the electric power system sector at the department of energy of politecnico di milano. Railway electrification has many advantages but requires significant capital expenditure for. Technical regulatory standards on japanese railways.
A railway electrification system supplies electric power to railway trains and trams without an onboard prime mover or local fuel supply. The railway system division, in its commitment to future progress, has consistently achieved technological breakthroughs on three systems that are shaping the future worldwide. High voltage transmission is used so that smaller, more economical wire sizes can be employed to carry the lower current and to reduce losses. The two live cores are usually referred to as l1 and. High speed rail electric power supply network summary globally, the highspeed rail industry is experiencing enormous and speedy growth. Electrical railway transportation systems wiley online books. Access study documents, get answers to your study questions, and connect with real tutors for electrical 4141. Over the years, northwest rail electric has been involved with providing a wide assortment of systems for railroad passenger cars. The power supply voltage is often transformed down to a lower voltage to minimise voltage drop when distributed over longer distances. The railway system is the central element of the electrical system and it can be divided into the traction substations, the railway transmission grid when applicable, the generators and storage. Electrical engineering in railways made its beginning with the responsibility of illumination and ventilation at railway stations, offices and residential complex and water supply. 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. Why 25kv is used in railway traction system electrical4u. At its beginnings, it was mainly utilised in the central european mines with diffe rent means of traction being applied.
Electrical railway transportation systems ieee press series on power engineering brenna, morris, foiadelli, federica, zaninelli, dario on. Electrical railway transportation systems ieee press. Numerous electrical components are displayed on the diagrams and each component can be in di. The requirements for transformers used in electric railways are demanding and special. To answer these questions its best to first look at how the system operates, especially in a fault situation. With the introduction of electronic interlocking technology and agreement for the time being on a european system for the management and control of railway transport ertms european rail traffic management system, the railway is once again able to assume. Gsmr global system for mobile railways ht high tension voltage as defined in indian electricity rules.
Introduction establishment electric loco shed was set in 1976 by railway electrification organisation 8910 sq. Electric railway systems at the university of hong kong. Simulation of railway power supply comprail 2008 simulation of railway power supply systems why. It has an unprecedented opportunity to achieve the sustainability which is required for the twenty first century. Matlab and simulink enable grid simulation and analysis to replicate and analyze energy transfers in different operation conditions depending on the characteristics of your voltage, current, or contact electrification system. In an electrical railway system, the combination with a slotted conduit of an insulated conductor supported therein, an insulated sheath or screen surrounding the conductor, a motor car adapted to run on tracks parallel with the conduit, a conducting plate or bar carried by an arm depending from the car into the eonduit,and an electrical. Electrical engineering for railway systems aau aait 5 kilo. Railway signalling equipment power system earthing rail. Operational and safety considerations for light rail dc. Technical regulatory standards on japanese railways railway bureau ministry of land, infrastructure, transport and tourism. Pdf handwritten control system made easy study materials. The main reason for 25kv voltage used in railway is, that 25 kv ac more economical than 1. In this system, the current is mainly carried between the overhead line and a feeder transmission line instead of the rail. Around the world, proposals for new high speed lines are booming.
The diagrams display one state of the circuit and are currently the only tool available for analysis of the system. Highspeed shinkansen railcar technology it has been some 40 years since the first series 0 shinkansen trains began operating at 210 kmh, and now the new series n700 tokaido and sanyo shinkansen trains will operate at maximum line speeds. Changes in society confront railroads today with challenging issues. Electrical modelling of a dc railway system with multiple trains. Ecs environmental control system edr electrical distribution rooms eia environmental impact. Subsequently, 110 v dc tl system was introduced on railways. Rail and metro lines are powered by traction power substations tpsss located within an appropriate proximity in order to ensure the best power performance and safety for the transportation system. There are several different electrification systems in use throughout the world. Ltk engineering services n overview is presented of an integrated approach to operational and safety issues when. Electric railways use either electric locomotives hauling passengers or freight in separate cars or electric multiple units passenger cars with their own motors. Electrical railway transportation systems wileyieee press. Rail rapid transit metro high speed, high capacity trains multicar trains operate on short headways some can operate at 2 minutes or less electric power taken from a third rail exclusive rightofway underground, elevated, atgrade sophisticated signaling variety of other names metro, subway, underground, heavy rail. It is a pollution free system and with use of modern high. First, the human body electrical circuit model is developed, and tolerable step and touch potentials derived from ieee standard 80 are defined.
But in recent years, the railway has experienced a revival. The basic aim is to give a detailed description of how the most generally used traction and engine systems work in presentday railways. The electrical load flows and the energy consumption within railway power supply networks depend on the running trains and the power supply system characteristics. Manual of standards and specifications for railway stations v preface the objective of developing manual of standards and specifications for railway stations is to establish the bench marks for building either a new station or redevelop the existing railway stations into world class stations through ppp route. Pdf railway electrification systems and configurations. The choice of the system depends on the train service requirements, such as commuter rail, freight rail, light rail, train loads and the electric utility power supply.
Railway transportation systems for a comfortable future. Powerelectronics issues of modern electric railway systems a. New life for existing locomotives through emissions compliance. The running rails in a dc electrified traction system are one of the main sources of electromagnetic disturbance to internal and external metallic structures and installations, such as civil works viaducts and tunnels, pipelines and cables. The challenge of integrating electrical systems will not be made any easier as client and public expectations of new rail transit systems require railway designers to incorporate more versatile and sophisticated electri. Integration is the term given to ensuring that the different elements of an electri. High speed railway capacity v conf railway technical. Now as a policy, railway have switched over to 110 v dc system from 24 v dc.
The permissible range of voltages allowed for the standardised voltages is as stated in standards bs en 50163 and iec 60850. It is worth noting the colour scheme shown in the diagram above, in particular the fact that both cores are live so there is no neutral. Traction power electrification system investigation wmata. Manual for standards and specifications for railway stations june 2009. Electrical system bureau of energy efficiency 3 service. Pdf railway electrical systems integration practical.
Frequencies in acfed electric railways are 16,67 hz, 25 hz. Below is a countrybycountry guide to how abb solutions are supporting utilities, rail operators and train manufacturers in order to overcome the. Oct 31, 2014 electrical engineering is the field of the study of generation, transmission, distribution and use of electrical energy. It is preferable to locate the substations at the actual existing primary grid stations with a provision for adequately protected railway. Amtrak regional trains on most complex, and most technically advanced rail systems in the world, with over 2,000 trains on amtrakcontrolled segments each weekday. Federal transit administration december 9, 2016 8 new insulators that can be removed for cleaning and then reinstalled. 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. Alan baxter network rail guide to overhead electrification 2787albguneoh000001 february 2015 rev 10 3 of 52 2. This system includes circuit breakers, contactors, and various controls including heating, air conditioning, generator controls if present and various other equipment.
Objectives of the electrical engineering for railway systems program. Electric traction 1701 however, the steam locomotive suffers from the following disadvantages. The main part of the system is a complex electrical circuit which is documented on diagrams. The energy obtain from railway track is one source of to generate non conventional energy because there is no need of fuel as a input to generate the output in the form electrical power and these is done by using simple gear drive mechanism. The track electrification refers to the type of source supply system that is used while powering the electric locomotive systems. To study the ess size, location and control, it is necessary to develop a sophisticated voltage model capable of supporting multiple train simulations. Electrical railway transportation systems is an ideal text for graduate students studying the subject as well as for industry professionals working in the field. Rail track and associated equipment for use underground in mines guidance on selection, installation and maintenance contents status of document 3 introduction 4 some basic principles 4 what the guidance covers 4 who the guidance is for 4 the legal framework 4 components of rail track 5 rails 5. This post is quick introduction and overview to different railway electrification voltages used in answer to a question sent in via email. The voltage situation as well as the network structure influence the. Effect of low power factor is that the generator capacity in the power house is inefficiently utilized, voltage regulation will be poor and system losses and energy bill will be higher. It provides a study of alternating current systems, whether for power supply frequency or for special railway frequency, that are used around. These engines are now being rapidly replaced by electric engines 43.
While there are numerous voltages in use through out the world many dating back a hundred years, fortunately the. Railway technology systems index 001 002 company stemmanntechnik 003 worldwide presence railway products, quality made in germany 004 metro and suburban systems third rail shoegears 005 systems for third rail shoegears 006 components for third rail shoegears 007 008 suburban railway roofmounted pantographs for suburban railway. Industrial training electrical loco shed, ghaziabad name. Because of the number and complexity of the issues to be addressed, the technology assessment was divided into three separate, but coordinated, studies dealing with 1 the planning process, z automated small vehicle systems, and 3 automatic train control in rail rapid transit.