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Littérature scientifique sur le sujet « Railway power supply »

Auteur : Grafiati
Publié le 1 février 2025

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Articles de revues sur le sujet "Railway power supply"

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Zong, Ruixue. « Power Quality Problems of the Electrified Railway and Its Control Methods ». Journal of Physics : Conference Series 2496, no 1 (1 mai 2023) : 012017. http://dx.doi.org/10.1088/1742-6596/2496/1/012017.

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Abstract In developing the railway industry, the electrified railway plays a significant role in improving the national economy. However, the electric railway power supply system will be affected by power quality problems such as negative sequence, harmonic, and voltage fluctuation in actual operation, which will affect the operation efficiency of the electric railway power supply system. Therefore, it is meaningful to take economic and effectual governance measures against the power quality problems of electrified railways and reduce various indicators to the range allowed by a national standard. This paper summarizes and sorts out the main problems and their causes of current electrified railway power quality and several existing mainstream power quality governance schemes. It analyzes their advantages and disadvantages and finally looks forward to the directions that can be optimized and improved in the future study of electrified railway power quality problems in combination with social reality. It has a specific guiding effect on future research on electrified railway power quality.
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Gusarova, Elena V., Valeriy V. Kharchenko et Valentin A. Gusarov. « System of the Autonomous Lighting of Railway Objects ». Elektrotekhnologii i elektrooborudovanie v APK 48, no 4 (décembre 2021) : 36–44. http://dx.doi.org/10.22314/2658-4859-2021-68-4-36-44.

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Railways run throughout Russia. There are sections of roads where centralized power supply lines are located far away or absent. It is difficult to regulate and ensure traffic safety at the sufficient level on such sections at the intersection of roads and railways at the same level. (Research purpose) The research purpose is to analyze the equipment available on the Russian market, powered by renewable energy sources, to solve the problem of guaranteed power supply to remote railway infrastructure objects and to select the most promising types, the effectiveness of which depends on natural and climatic conditions. (Materials and methods) The article presents a power supply system that can be applied to various artificial and engineering structures of general-purpose railway transport, such as crossings, bridges, tunnels, crossings in front of bridges and tunnels, sidings and others, for emergency or on-duty lighting. Such a system allows you to save electricity coming from a centralized power supply system, and in the case of an emergency shutdown, to provide power supply to the facility for a long time, and perform the function of backup power supply, but it takes on special importance in places where there are no centralized networks, when using it as an autonomous power supply system. (Results and discussion) The article presents a classification according to the categories of autonomous power supply systems, criteria of importance and power consumption of the objects, and gives the conditions for their use. The article describes a block diagram of the power supply system of a pedestrian crossing over a single track with energy reservation for up to three days. The daily energy consumption of a railway pedestrian crossing with lighting and railway traffic lights, installed the energy capacity of batteries with redundancy for up to three days, the power and number of photovoltaic converters are calculated. (Conclusions) An example of an autonomous lighting system for a railway pedestrian crossing with established technical parameters of equipment showed the social and economic efficiency of its application.
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Domanskyi, Valerii, Illia Domanskyi, Svitlana Zakurdai et Dmytro Liubarskyi. « Development of technologies for selecting energy-efficient power supply circuits of railway traction networks ». Technology audit and production reserves 4, no 1(66) (31 août 2022) : 47–54. http://dx.doi.org/10.15587/2706-5448.2022.263961.

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The object of the study is the process of operation of traction and external power supply systems as objects of inextricable interconnection while reducing energy costs in the cost of railway transportation in real time. One of the most problematic areas is the technology for choosing energy-efficient power supply schemes for railway traction networks in real time. The methods of forming and transforming graphs of complex schemes of traction and external power supply systems and building expert control systems for the implementation of energy-saving technologies of electrified railways were further developed in the work. In the course of the study, to increase the efficiency of simulation modeling of electric traction networks, the statistical characteristics of the loads of feeders that supply the final boundary sections, stations, depot access tracks, railway junctions and idle voltages on the traction substation tires were obtained. Methods of calculation and modeling of traction power supply have been developed, which take into account the inseparable relationship with power systems and allow choosing rational modes with minimal power flows and energy losses. Proposed methods of managing the modes of operation of the traction power supply system based on a vague description of their states and an expert system that allow solving new problems. Including, the choice of energy-saving power supply schemes in the case of power flows, economic modes of network operation in case of intensification of the transportation process. Thanks to this, ways of reducing power consumption and minimizing energy losses of traction power supply systems are proposed, which allow minimizing power flows and power losses by adjusting load flow parameters and voltage levels of traction substations. And also to increase the energy efficiency of electrified railway lines. The technique of technical and economic feasibility of power supply schemes of traction networks and evaluation of the possibility of switching to cantilever or loop power supply schemes with parallel connection points has been developed. The implemented recommendations save about 25 thousand kWh per 1 km of two-track section.
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Grigor’ev, N. P., I. V. Ignatenko, S. A. Vlasenko, V. A. Kovalev et V. V. Shatalov. « Increasing the performance of the Far Eastern Railway traction power supply system ». RUSSIAN RAILWAY SCIENCE JOURNAL 81, no 3 (21 septembre 2022) : 248–57. http://dx.doi.org/10.21780/2223-9731-2022-81-3-248-257.

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Introduction. The purpose of the study is to develop measures determined by the strategic programmes for the development of Russian railway transport based on the analysis of power supply schemes for the traction network of the Far Eastern Railway, a branch of Russian Railways.Materials and methods. Evaluation of the performance of the traction power supply system was made based on the analysis of the actual performance of the Far Eastern Railway section, as well as the theories of electrical engineering and power supply of the 25 kV AC electrified railway system.Results. Based on the analysis of the joint operation of the external and traction power supply systems of the Far Eastern Railway, four traction substations with low technical and economic indicators were identified. Network sections that feed the substations are a bottleneck in the traction power supply system. It is proposed to increase the efficiency by switching the connection of the windings of transformers of traction substations to the systems of external and traction power supply according to the typical star – delta scheme. Such a connection will ensure an increase in the speed of trains, a reduction in train succession time and losses of electricity, an increase in the quality of electric energy in the external power supply system and electric networks of the Far Eastern Directorate for Energy Supply (a structural subdivision of Transenergo, a branch of Russian Railways).Discussion and conclusion. Normalisation of the connection of four traction substations according to the feeding scheme is ensured by changing the phasing in such a way that the power supply of the two legs of one winding of the power transformer is transferred to two windings. Alignment of the current modules in the windings of transformers of traction substations makes it possible to reduce the voltage drop in the most loaded phase and, accordingly, increase the voltage in the traction network, which ensures an increase in the speed of trains and a reduction in passing intervals. Switching the power supply of the arms from one winding of the transformer to two reduces the loss of electrical energy in power transformers and the external power supply system. Reducing the current unbalance in the windings of the power transformer improves the quality of electrical energy in the system of external and district power supply. An increase in the service life of the power transformer is ensured by a decrease in the intensity of thermal wear of the insulation of the most loaded winding.
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Bondarenko, A. V. « Innovative principles of electric power supply of non-traction power consumers of railway transport ». Herald of the Ural State University of Railway Transport, no 2 (2020) : 44–50. http://dx.doi.org/10.20291/2079-0392-2020-2-44-50.

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The issues of fundamental changes of electric power-supply of non-traction devices, such as, line-section devices and systems of railway transport are addressed in the article. It is clearly shown that the possibility of electric power-supply of such consumers without using the common high-voltage line-section power-supply lines of alternative voltage of 6 or 10 kV and respective power-supply substations can be implemented in practice. The essence of the proposed is that the electric power-supply source is not a high-voltage power-supply line, but a device which converts potential mechanical energy of a train, moving along a line section between signal points of railway automatic block system, into electrical one. Putting the described power-supply devices into operation provides technical as well as economic advantages over currently and widely used power-supply systems. The conversion of energy is carried out by changing magnetic resistance of a magnetic circuit, which includes railway car wheel-set in motion and direct neodymium magnet. Change in magnetic resistance due to the law of electromagnetic induction results in alternate voltage in the inductance coil, which is used as the electric power-supply source for non-traction line-section power consumers, including but not limited to, signal point of railway automatic block system. In case there is no wheel-set on the converter, electric power-supply for the power consumer is delivered by the electric energy accumulated in an ionistor (supercapacitor).
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БОЙКО, СЕРГІЙ, СВЯТОСЛАВ ВИШНЕВСЬКИЙ, ПЕТРО ПОЛІЩУК, ОЛЕКСАНДРА ЛАПІНА et СТАНІСЛАВ ГВОЗДІК. « ПЕРСПЕКТИВИ ВЗАЄМОДІЇ ЗАЛІЗНИЧНОГО ТА АВІАЦІЙНОГО ТРАНСПОРТУ В АСПЕКТІ ДЕКАРБОНІЗАЦІЇ ТА ІНТЕЛЕКТУАЛІЗАЦІЇ ». Herald of Khmelnytskyi National University. Technical sciences 343, no 6(1) (28 novembre 2024) : 56–61. https://doi.org/10.31891/2307-5732-2024-343-6-7.

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Main railway transport occupies an important place in the field of domestic freight and passenger transport. On the other hand, railway transport is a consumer of both fuel and electrical energy. The electrification of main railways brings Ukraine closer to the successful implementation of the program of decarbonization and greening in the field of transport. Meanwhile, the dependence of electrified railway transport on the supply of electrical energy is increasing, which affects the safety of transportation, timeliness and reliability of cargo delivery. In terms of intellectualization, modern digital and telecommunication technologies are being implemented in railway transport, which require reliable and high-quality power supply. For this purpose, a number of scientific studies consider the possibility and make specific proposals regarding the inclusion of sources of distributed generation, including on the basis of renewable sources of electrical energy, in particular wind generators, solar batteries or their hybrid combinations. Such solutions make it possible to ensure a reliable power supply of the responsible electric receivers of the rolling stock, thereby ensuring the reliability of the operation of railway transport. At the same time, new principles of interaction between different types of transport are being actively implemented. One of them is the interaction of railway and air transport. Aviation transport today is represented by manned aircraft and unmanned aerial vehicles. The vision proposed by the authors regarding the improvement of the existing power supply systems in the aspect of decarbonization and intellectualization of the railway infrastructure is aimed at maintaining a sufficiently high level of safe interaction of the railway with other types of transport, including air transport. Increasing the level of safety in railway transport is achieved due to the introduction of new technologies for the purpose of monitoring the state of the railway infrastructure through the introduction of unmanned aerial vehicles.
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Karlina, A. I., A. R. Akhmetshin, K. V. Suslov, V. A. Olentsevich, A. V. Sivtsov et Yu I. Karlina. « Justification of measures aimed at increasing the capacity of a section of a railway line, taking into account its required electrical capacities ». Journal of Physics : Conference Series 2176, no 1 (1 juin 2022) : 012041. http://dx.doi.org/10.1088/1742-6596/2176/1/012041.

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Abstract The annual increase in cargo turnover to the Far Eastern seaports contributes to the optimization of the railway infrastructure in order to increase the level of throughput and processing capacity of the Baikal-Amur Mainline and Trans-Siberian Railway facilities. JSC Russian Railways pays special attention to these issues. Organization and promotion of car traffic through the formation of freight trains using the connection technology, “virtual coupling”, heavy and dual trains that move on an ongoing basis is one of the innovative methods for increasing the carrying capacity for highly loaded sections and directions at a level of utilization of their throughput of 0, 8 or more. Under these conditions, the organization of efficient power supply of railway sections and facilities is the main factor influencing the value of the throughput capacity of transport infrastructure facilities. The article presents a technical justification for the measure aimed at increasing the throughput and processing capacity of a section of a railway line, taking into account the stability check of the devices of the traction power supply system. The predicted parameters of the operation of the traction power supply system of the railway line section are given with a promising train schedule.
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Qu, Zhi Jian, et Li Liu. « Real-Time Database System Implementation of Railway Signal Power Source Remote Monitoring ». Applied Mechanics and Materials 128-129 (octobre 2011) : 961–64. http://dx.doi.org/10.4028/www.scientific.net/amm.128-129.961.

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Railway signal is a key technology for high-speed railway，which is the foundation to keep the high-speed train line. Railway signal power is the automatic blocking of railway lines and 10kV lines transform into 380V power through after the power supply for railway signals. Signal power as the railway traffic signal of the power supply, it belongs to the first level of power system load. Its 10kV high voltage side stik up by the major of electric, 380V low voltage side maintenance by the signal major. When the signal power failure, often occur shirk responsibilities between the different majors, in order to define the responsibilities of the accident better, which need automation remote monitoring for main railway lines of the railway signal power and scheduling control as soon as possible[1-3].
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Wu, Si, Mingli Wu et Yi Wang. « A Novel Co-Phase Power-Supply System Based on Modular Multilevel Converter for High-Speed Railway AT Traction Power-Supply System ». Energies 14, no 1 (5 janvier 2021) : 253. http://dx.doi.org/10.3390/en14010253.

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The existing problems of the traction power-supply system (i.e., the existence of the neutral section and the power quality problems) limit the development of railways, especially high-speed railways, which are developing rapidly worldwide. The existence of the neutral section leads to the speed loss and traction loss as well as mechanical failures, all of which threaten the fast and safe operation of the train and the system. Meanwhile, the power quality problems (e.g., the negative sequence current, the reactive power, and the harmonic) can bring a series of problems that cannot be ignored on the three-phase grid side. In response, many researchers have proposed co-phase power-supply schemes to solve these two problems simultaneously. Given that the auto-transformer (AT) power-supply mode has become the main power-supply mode for the high-speed railway traction power-supply system, it has a bright future following the rapid development of the high-speed railway. In addition, there is no co-phase power-supply scheme designed for AT power-supply mode in the existing schemes. Therefore, the main contribution of this paper is to propose a specifically designed power-supply mode more suitable for the AT, as well as to establish the control systems for the rectifier side and the inverter side. In addition, for the proposed scheme, the operation principle is analyzed, the mathematical model is built, and the control system is created, and its functionality is verified by simulation, and its advantages are compared and summarized finally. The result proves that it can meet functional requirements. At the same time, compared with the existing co-phase power-supply scheme, it saves an auto-transformer in terms of topology, reduces the current stress by 10.9% in terms of the current stress of the switching device, and reduces the power loss by 0.25% in terms of the entire system power loss, which will result in a larger amount of electricity being saved. All of this makes it a more suitable co-phase power-supply scheme for the AT power-supply mode.
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Milivoj Mandić, Ivo Uglešić et Viktor Milardić. « ELECTRIC RAILWAY POWER CONSUMPTION ». Journal of Energy - Energija 58, no 4 (16 septembre 2022) : 384–407. http://dx.doi.org/10.37798/2009584306.

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The electric railways is a specific consumer of the electric power system. For the purpose of using electric energy rationally and making adequate savings, efforts are made to optimize electric energy consumption of electric trains and other electric railway facilities. The work shows the train movement simulation algorithm which serves to determine primarily the mechanical and then also the electric power required for traction. The sections of the electrified tracks are supplied from the electric traction substation (TS) and, for the requirements of the electric traction calculation, an electric network is formed. Based on the maximum time table for a certain time period, calculation is done of the electric circumstances; electricity, voltage, electric power, as well as the total consumed electric energy. For the determination of the electric energy supply of the traction unit, movement resistances of the certain train on each section need to be calculated. Input data necessary for such a calculation are the tracks profile parameters, planned movement speeds on certain sections, and the properties of the train and the locomotive. Besides the train movement simulation model, the article also shows the analysis of impact factors on the electric energy consumption for the electromotor train which travels the Croatian suburban rails. The results are obtained by the train movement simulation algorithm, by virtue of which the locations of trains are calculated, as well as their mechanical and electric powers necessary for traction. The particular example of the supply of the existing SS serves for comparing the results obtained by electric traction calculation and measurement. Some of the results are given of the electric traction simulation for the Zaprešić SS at the supply of the suburban Podsused factory − Samobor − Bregana which is planned for construction.
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Thèses sur le sujet "Railway power supply"

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Abrahamsson, Lars. « Railway Power Supply Models and Methods for Long-term Investment Analysis ». Licentiate thesis, Stockholm : Royal Institute of Technology, 2008. http://kth.diva-portal.org/smash/record.jsf?searchId=3&pid=diva2:117.

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Skogberg, Ronny. « Railway power supply system models for static calculations in a modular design implementation ». Thesis, KTH, Elektriska energisystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170726.

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Several previous theses and reports have shown that voltage variations, and other types of supply changes, can influence the performance and movements of trains. As part of a modular software package for railway focused calculations, the need to take into account for the electrical behavior of the system was needed, to be used for both planning and operational uses. In this thesis, different static models are presented and used for train related power flow calculations. A previous model used for converter stations is also extended to handle different configurations of multiple converters. A special interest in the train type IORE, which is used for iron ore transports along Malmbanan, and the power systems influence to its performance, as available modules, for mechanical calculations, in the software uses the same train type. A part of this project was to examine changes in the power systems performance if the control of the train converters were changed, both during motoring and regenerative braking. A proposed node model, for the static parts of a railway power system, has been used to simplify the building of the power system model and implementation of the simulation environment. From the results it can be concluded that under normal conditions, for the used train schedule, the voltage variation should not restrict the trains traction performance. It can also be seen from the results that a more optimized power factor control with a higher regenerative brake power or generation of reactive power could be used to limit the need for investments in infrastructure or to increase the traffic for a given system layout.
I ett flertal tidigare undersökningar och rapporter har konstaterats att spänningsvariationer, och andra förändringar, hos strömförsörjningen till tåg kan påverka dess prestanda och dess färd längs rälsen. Som en del av ett modulärt programpaket för tågrelaterade beräkningar uppstod därför ett behov av elkraftsberäkningar, både för planering och operativ drift. I denna rapport sammanställs och används ett antal olika statiska modeller för tågrelaterade effektflödesberäkningar. Modellen för omformarstationer har även utökats för att hantera konfigurationer då olika typer av omformare används. Ett särskilt intresse för tågtypen IORE, som används för malmtransporter längs Malmbanan, och dess påverkan av en förändrad strömförsörjning, har funnits då olika typer av mekaniska beräkningar för denna tågtyp utförs i andra befintliga moduler. En del av projektet bestod i att undersöka förändringar i elförsörjningen, på grund av en ändrad styrning av tågens omformare, både vid återmatning och motordrift. En föreslagen nodmodell för den statiska delen av elnätet har använts för att förenkla elsystemsmodellen och uppbyggnaden av simuleringsmiljön. Av resultaten från simuleringarna kan man anta att under normala förhållanden, och med det använda körschemat, bör ej spänningen vara en begränsande faktor för tågens drift. Övriga simuleringar visar också att en mer optimerad effektfaktor för högre återmatad bromseffekt eller för generering av reaktiv effekt kan användas för att slippa investeringar i infrastrukturen, eller för att utöka trafikmängden för ett givet system.
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Tan, Pee-Chin 1975. « A VSI-based power quality conditioner for 25kV electrified railway systems ». Monash University, Dept. of Electrical and Computer Systems Engineering, 2003. http://arrow.monash.edu.au/hdl/1959.1/5537.

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Seimbille, Denis. « Design of power supply system in DC electrified transit railways - Influence of the high voltage network ». Thesis, KTH, Elektrisk energiomvandling, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-153924.

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Urban rail systems such as subways and trams transport millions of people every day, oering a high level of service. Most of these systems are fed by direct current (DC). The design of the power supply network of DC electried transit railways is of great importance and requires the use of simulation models. 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. Many simulation models ignore the high voltage network in the design process whereas it has a signicant inuence on the results. A Newton-Raphson algorithm is implemented to solve the AC load ow in the high voltage network, and coupled to the existing simulation software Symphonie. Three dierent high voltage network architectures are simulated, and the simulation results are analyzed. The results show that the voltage drop at the AC side of traction substations and the load sharing between them varies signicantly from one architecture to another. In particular, when several traction substations are connected to the same high voltage loop, voltage drops can be signicant for some traction substations. In conclusion, the design of the power supply network of DC electried transit railways requires the simulation of the high voltage network when several substations are connected to the same high voltage loop.
Publika sparburna transportsystem sasom tunnelbanor och lokalbanor transporterar miljontals manniskor varje dag. De esta korta linjer matas med likstrom. Utformningen av stromforsorjningen till dessa system ar avgorande for ett val fungerande , och forutsatter anvandningen av olika matematiska modeller. Detta natverk bestar av ett vaxelstroms hogspanningsnat som omformas till likstrom i era banmatningsstationer langs banan. Dessa matematiska modeller ignorerar dock ofta hogspanningsdelen i modelleringen, varfor resultatet ibland kan bli missvisande. I detta arbete har en belastningsfordelningsalgoritm baserad pa Newton-Raphsons metod implementerats for att skapa en battre modellering av hsgspanningsdelen i den bentliga programvaran Symphonie. Tre olika hogspanningsstrukturer har bearbetats och resultatet visar att spanningsfall och belastningsf ordelning varierar mellan de olika strukturerna. Speciellt nar era transformatorstationer ar kopplade till samma hogspanningssystem, kan spanningsfall vara patagligt for vissa transformatorstationer. Sammanfattningsvis maste utformningen av hogspanningsystemet till likstromsforsorjda jarnvagar utformas med hjalp av anpassade matematiska modeller som tar hansyn till placering av transformatorstationer liksom hogspanningsnatets kapacitet.
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Flumian, Didier. « Nouvelle topologie multicellulaire de compensateur de déséquilibre de tension pour les sous-stations ferroviaires 25kV/50Hz ». Electronic Thesis or Diss., Université de Toulouse (2023-....), 2024. http://www.theses.fr/2024TLSEP123.

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Pour accroitre le trafic ferroviaire, la qualité de l’alimentation en énergie électrique est primordiale. Il est nécessaire de garantir d’une part, un niveau de tension satisfaisant pour le bon fonctionnement des engins de traction et d’autre part un prélèvement d’énergie au réseau amont de transport d’électricité satisfaisant les normes de qualités. Pour les lignes électrifiées en 25kV/50Hz, l’augmentation de la puissance consommée ne peut être tolérée par le fournisseur d’énergie électrique qu’à condition que le déséquilibre des tensions, dû au raccordement de la sous-station entre deux phases, soit minime. Pour satisfaire cette contrainte et relever le défi de l’augmentation du trafic sur ses lignes, SNCF-Réseau doit faire appel à des solutions électroniques de puissance.Les systèmes de compensation actuellement utilisés par SNCF-Réseau sont basés sur des onduleurs de tension triphasés. Ceux-ci présentent des pertes élevées et leur maintenance est délicate. C'est dans ce contexte qu’une nouvelle topologie modulaire à faibles pertes a été proposée en 2016 dans le cadre d’un projet ANR porté par le LAPLACE et associant les partenaires industriels SCLE et CIRTEM. Celle-ci est basée sur un circuit de compensation de Steinmetz contrôlée par des gradateurs MLI.Cette thèse a été réalisée dans le cadre du projet « High Voltage Balancing System » (HVBS), financé par le programme France 2030 opéré par l’ADEME. L’objectif de ce projet, débuté en 2019, est le dimensionnement, le développement et la réalisation industrielle d’une nouvelle topologie de compensateur de déséquilibre dédiée aux sous-stations ferroviaires 25kV/50Hz.Cette thèse présente tout d’abord les perspectives d’évolution du trafic ferroviaire puis dresse un l'état de l'art des topologies de compensateurs de déséquilibre. Par la suite, une étude comparative, considérant les pertes dans les semi-conducteurs et les énergies stockées dans les éléments réactifs permet de mettre en avant l'intérêt de la nouvelle solution proposée.Deux outils de dimensionnement, considérant les puissances consommées par les sous-stations, sont ensuite présentés. L’un est dédié aux sous-stations monophasées classiques, l’autre concerne les sous-stations à schéma en « V », utilisées principalement pour l’alimentation des lignes à grande vitesse.Afin de préparer l’installation du compensateur sur le réseau de transport d’électricité, une analyse harmonique du courant absorbé par la sous-station doit être réalisée. Celle-ci est ensuite exploitée dans un modèle de simulation qui permet de vérifier qu’il n’y a pas d’interactions entre le réseau haute tension triphasé, le système de compensation et la sous-station. Ceci démontre la robustesse du compensateur et de son contrôle vis-à-vis des perturbations harmoniques générées par les trains.Enfin, la dernière partie de cette thèse est dédiée à la réalisation et au test d'une branche expérimentale connectée au réseau 20kV et comprenant 54 gradateurs MLI connectés en série. Les résultats expérimentaux obtenus sur la plateforme d’essais de la société SCLE, sont présentés. Ils valident le bon fonctionnement de la solution développée et ouvrent la voie à son installation dans une des sous-stations critiques du réseau ferré national
To increase railway traffic, the quality of the electrical power supply is crucial. On the one hand, it is necessary to guarantee a satisfactory voltage level for the proper operation of traction units and, on the other hand, to ensure that the energy drawn from the upstream electricity transmission network meets quality standards. For 25kV/50Hz electrified lines, the increase in power consumption can only be tolerated by the power supplier if the voltage unbalance, due to the substation connection between two phases, is minimal. To meet this constraint and to meet the challenge of increasing traffic on its lines, SNCF-Réseau has to rely on power electronics solutions.The balancing systems currently used by SNCF-Réseau are based on three-phase voltage inverters. These systems have high losses, and their maintenance is complex. It is against this background that a new low-loss modular topology was proposed in 2016 as part of an ANR project led by LAPLACE and involving industrial partners SCLE and CIRTEM. This solution is based on a Steinmetz compensation circuit controlled by PWM AC choppers.This thesis was carried out as part of the “High Voltage Balancing System” (HVBS) project, funded by the France 2030 program operated by ADEME. The aim of this project, which began in 2019, is the design, development, and industrial realisation of a new unbalance compensator topology dedicated to 25kV/50Hz railway substations.This thesis first presents the future prospects for railway traffic, followed by a state-of-the-art review of unbalance balancing topologies. Subsequently, a comparative study, considering semiconductors losses and the reactive elements stored energies, highlights the advantages of the proposed new solution.Two design tools, considering the power consumed by the substations, are then presented. One is dedicated to conventional single-phase substations, while the other concerns "V" scheme substations, mainly used for the power supply of high-speed lines.To prepare for the installation of the compensator on the power transmission network, a harmonic analysis of the current absorbed by the substation must be carried out. This is then used in a simulation model to check that there are no interactions between the three-phase high-voltage network, the compensation system, and the substation. This demonstrates the robustness of the compensator and its control against harmonic disturbances generated by the trains.Finally, the last part of this thesis is dedicated to the realisation and testing of an experimental branch connected to the 20kV network and comprising 54 PWM AC choppers connected in series. The experimental results obtained on SCLE's test platform are presented. They validate the proper operation of the developed solution and pave the way for its installation in one of the critical substations of the national railway network
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Pedral, Jacques, et Josef Abriren. « Analys av lågspänningsfördelning till signalanläggningar ». Thesis, KTH, Data- och elektroteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-192837.

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I denna rapport utreds hur systemdesignen av lågspänningsfördelningen för järnvägen kan kostnadseffektiviseras. I dagsläget har det utarbetats en norm kring systemdesignen som tenderar att efterbildas från år till år vilket har medfört brist på innovation inom området. Syftet med arbetet var att designa två typstationer med signalställverken M11 respektive M95, där placering samt nominell storlek av UPS:er skulle fastställas för att tillhandahålla en kostnadseffektiv lösning. Dessutom skulle kablage dimensioneras för typstationerna samt se över möjligheten att ersätta UPS:er med likriktarsystem. Stationerna baserades på två redan existerande driftplatser, Fagersta C (M11) och Skänninge (M95). Slutligen skulle olika energilagringsalternativ för UPS-system jämföras för att tillhandahålla det lämpligaste alternativet. Genom simuleringar och beräkningar i bland annat datorprogrammet El-Vis har lågspänningsfördelningen dimensionerats för typstationerna. Arbetet visar på att ett distribuerat UPS-system är att föredra ur ett ekonomiskt perspektiv gentemot ett centraliserat UPS-system. Vidare har det konstaterats att likriktarsystemet Rectiverter kan ersätta UPS:er samt att ackumulatorer är det mest passande energilagringsalternativet.
This report identifies how the system design of low voltage power distribution of the railway can be more cost effective. In the current situation there is a norm on the system design that tends to be replicated each year. This has brought a lack of innovation in the field. The purpose of the thesis was to come up with two model stations with the interlocking system M11 respectively M95, where the positioning and nominal size of the UPS:s would be determined to provide a cost effective solution. Furthermore, the cable dimensioning of the model stations was computed as well as the possibility of replacing UPS-systems with rectifier-systems. The model stations were based on two already existing operating sites, Fagersta C (M11) and Skänninge (M95). Lastly, different energy storage alternatives for UPS-systems were compared to acquire the most appropriate choice. Through simulations and calculations in, inter alia, the computer program El-Vis, the low voltage power distribution was dimensioned for the model stations. The thesis shows that a distributed UPS-system is preferred in an economical point of view compared to a centralized UPS-system. Furthermore, the thesis establishes that the rectifier system Rectiverter can replace UPS:s. It also states that accumulators are the most suitable alternative for energy storage.
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Boora, Arash Abbasalizadeh. « Flexible high-power multi DC-DC converters for train systems ». Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/33208/1/Arash_Boora_Thesis.pdf.

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This thesis reports on the investigations, simulations and analyses of novel power electronics topologies and control strategies. The research is financed by an Australian Research Council (ARC) Linkage (07-09) grant. Therefore, in addition to developing original research and contributing to the available knowledge of power electronics, it also contributes to the design of a DC-DC converter for specific application to the auxiliary power supply in electric trains. Specifically, in this regard, it contributes to the design of a 7.5 kW DC-DC converter for the industrial partner (Schaffler and Associates Ltd) who supported this project. As the thesis is formatted as a ‘thesis by publication’, the contents are organized around published papers. The research has resulted in eleven papers, including seven peer reviewed and published conference papers, one published journal paper, two journal papers accepted for publication and one submitted journal paper (provisionally accepted subject to few changes). In this research, several novel DC-DC converter topologies are introduced, analysed, and tested. The similarity of all of the topologies devised lies in their ‘current circulating’ switching state, which allows them to store some energy in the inductor, as extra inductor current. The stored energy may be applied to enhance the performance of the converter in the occurrence of load current or input voltage disturbances. In addition, when there is an alternating load current, the ability to store energy allows the converter to perform satisfactorily despite frequently and highly varying load current. In this research, the capability of current storage has been utilised to design topologies for specific applications, and the enhancement of the performance of the considered applications has been illustrated. The simplest DC-DC converter topology, which has a ‘current circulating’ switching state, is the Positive Buck-Boost (PBB) converter (also known as the non-inverting Buck-Boost converter). Usually, the topology of the PBB converter is operating as a Buck or a Boost converter in applications with widely varying input voltage or output reference voltage. For example, in electric railways (the application of our industrial partner), the overhead line voltage alternates from 1000VDC to 500VDC and the required regulated voltage is 600VDC. In the course of this research, our industrial partner (Schaffler and Associates Ltd) industrialized a PBB converter–the ‘Mudo converter’–operating at 7.5 kW. Programming the onboard DSP and testing the PBB converter in experimental and nominal power and voltage was part of this research program. In the earlier stages of this research, the advantages and drawbacks of utilization of the ‘current circulating’ switching state in the positive Buck-Boost converter were investigated. In brief, the advantages were found to be robustness against input voltage and current load disturbances, and the drawback was extra conduction and switching loss. Although the robustness against disturbances is desirable for many applications, the price of energy loss must be minimized to attract attention to the utilization of the PBB converter. In further stages of this research, two novel control strategies for different applications were devised to minimise the extra energy loss while the advantages of the positive Buck-Boost converter were fully utilized. The first strategy is Smart Load Controller (SLC) for applications with pre-knowledge or predictability of input voltage and/or load current disturbances. A convenient example of these applications is electric/hybrid cars where a master controller commands all changes in loads and voltage sources. Therefore, the master controller has a pre-knowledge of the load and input voltage disturbances so it can apply the SLC strategy to utilize robustness of the PBB converter. Another strategy aiming to minimise energy loss and maximise the robustness in the face of disturbance is developed to cover applications with unexpected disturbances. This strategy is named Dynamic Hysteresis Band (DHB), and is used to manipulate the hysteresis band height after occurrence of disturbance to reduce dynamics of the output voltage. When no disturbance has occurred, the PBB converter works with minimum inductor current and minimum energy loss. New topologies based on the PBB converter have been introduced to address input voltage disturbances for different onboard applications. The research shows that the performance of applications of symmetrical/asymmetrical multi-level diode-clamped inverters, DC-networks, and linear-assisted RF amplifiers may be enhanced by the utilization of topologies based on the PBB converter. Multi-level diode-clamped inverters have the problem of DC-link voltage balancing when the power factor of their load closes to unity. This research has shown that this problem may be solved with a suitable multi-output DC-DC converter supplying DClink capacitors. Furthermore, the multi-level diode-clamped inverters supplied with asymmetrical DC-link voltages may improve the quality of load voltage and reduce the level of Electromagnetic Interference (EMI). Mathematical analyses and experiments on supplying symmetrical and asymmetrical multi-level inverters by specifically designed multi-output DC-DC converters have been reported in two journal papers. Another application in which the system performance can be improved by utilization of the ‘current circulating’ switching state is linear-assisted RF amplifiers in communicational receivers. The concept of ‘linear-assisted’ is to divide the signal into two frequency domains: low frequency, which should be amplified by a switching circuit; and the high frequency domain, which should be amplified by a linear amplifier. The objective is to minimize the overall power loss. This research suggests using the current storage capacity of a PBB based converter to increase its bandwidth, and to increase the domain of the switching converter. The PBB converter addresses the industrial demand for a DC-DC converter for the application of auxiliary power supply of a typical electric train. However, after testing the industrial prototype of the PBB converter, there were some voltage and current spikes because of switching. To attenuate this problem without significantly increasing the switching loss, the idea of Active Gate Signalling (AGS) is presented. AGS suggests a smart gate driver that selectively controls the switching process to reduce voltage/current spikes, without unacceptable reduction in the efficiency of switching.
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Wu, Kuo-Chang, et 吳國彰. « Case Study on Railway Signalling and Power Supply Systems ». Thesis, 2014. http://ndltd.ncl.edu.tw/handle/ncv732.

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碩士
中原大學
電機工程研究所
102
This paper presents Taiwan High Speed Rail turnout control box damage caused by the lightning and Taipei MRT Mucha line third rail short circuit case analysis. The overhead ground wire of Taiwan High Speed Rail uses for shielding direct lightning. When the lightning strikes the overhead ground wire, the lightning current will flow at both upstream and downstream directions on the overhead ground wire and into the earth. The lightning surge not only causes the over-voltage in the overhead ground wire but also forms differences in a ground potential rise among the control equipment. As a result, these turnout control equipment are vulnerable to be damaged. From the above scenario, this thesis will survey effects of the lightning current on the turnout control box through the simulation software, namely, Alternative Transient Program (ATP). In addition, the following part of the thesis is to survey the Taipei MRT system supplied by a DC traction power source under short-circuit contingencies occurred at the third rail. In order to handle this problem, a DC fault current analysis has been performed due to the actual measurement data recorded. Moreover, three DC fault detection methods are proposed in the thesis to improve the operation of the MRT system. Consequently, instrumentation and control equipment in the MRT system can be effectively protected from the significant impacts of the DC short-circuit current.
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Chih-Yuan, Chen, et 陳志沅. « Supervisory Control and Protection for Power Supply of Railway Systems ». Thesis, 2002. http://ndltd.ncl.edu.tw/handle/43316727998676988537.

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碩士
國立臺灣科技大學
電機工程系
90
Railway plays a public transportation role. In order to provide people with a comfortable environment riding the train, a SCADA system is normally built to supervise each equipment in the power supply system of railway system. In a power supply system, protection relays are still treated as a stand-alone subsystem. They are not connected with SCADA network yet. Digital relays has no standard protocol in communication, therefore, to integrate them into SCADA network is a hard problem. In addition, SCADA systems measure voltage, current, real power and power factor of a power supply system via a lot of transducers and thus make wire connections very complicate. This research establishes a basic SCADA system which involves a power supply simulation system, a digital relay, a measurement system and a communication system. The contributions are as follows： 1.Digital relays are integrated into the SCADA network so that protection argument of the digital relay can be set up from remote. 2.Use LabVIEW G-language to establish virtual instruments to measure status of the power supply system of railway system. 3.Use a three-tier web architecture based on Internet for SCADA communication.
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KAO, YU-PIN, et 高育彬. « A Study of Establishing Transient Analysis Models for Taiwan Electrified Railway Power Supply System ». Thesis, 2004. http://ndltd.ncl.edu.tw/handle/34786200346215003648.

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碩士
逢甲大學
電機工程所
92
As the demand for railway transportation increases, Taiwan Railway Administration (TRA) acquires plenty of power electronics facilities and power supply systems. However, the extra equipment results in load imbalance and non-linear phenomenon in a more significant way, which causes Total Harmonic Distortion (THD) of the power supply system that is more serious than other users requiring for a tremendous amount of electricity. This problem not only damages TRA’s power supply system equipment, but also imposes impact on the quality of power consumption for the users along the railways. Based on the properties of harmonic waves of the power supply system of TRA, a module required for simulating AC track power supply system was established by integrating ElectroMagnetic Transient Program (EMTP) and ATPDraw software in this thesis to imitate the properties of harmonic waves for the dynamic behavior of the transportation system. The modules built in this thesis included Le Blanc transformer module, AC/DC converter module, DC/AC inverter module, Zig-Zag transformer module and filter module. The established modules were used to analyze the properties of harmonic waves of Le Blanc transformer and the impact of filter design to verify higher precision of this model. On the other hand, this model can not only shorten the duration of establishing the integral railway transportation system for TRA, but also be used as a reference for fault analysis and protective coordination conducted by railway engineers in the future.
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Livres sur le sujet "Railway power supply"

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Lao, Keng-Weng, Man-Chung Wong et NingYi Dai. Co-phase Traction Power Supply with Railway Hybrid Power Quality Conditioner. Singapore : Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-0438-5.

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Shao, Zongyi. Auto-transformer power supply system for electric railways. Birmingham : University of Birmingham, 1988.

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3

Great Britain. Parliament. House of Commons. Transport Committee. Railways : Southern region power supply upgrade : oral and written evidence, Wednesday 7 July 2004. London : Stationery Office, 2004.

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Wong, Man-Chung, Keng-Weng Lao et NingYi Dai. Co-phase Traction Power Supply with Railway Hybrid Power Quality Conditioner. Springer, 2018.

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Wong, Man-Chung, Keng-Weng Lao et NingYi Dai. Co-phase Traction Power Supply with Railway Hybrid Power Quality Conditioner. Springer, 2018.

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Electric traction - motive power and energy supply : Basics and practical experience. 2e éd. München : DIV Deutscher Industrieverlag GmbH, 2014.

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Dian qi hua tie lu gong dian yu dian neng zhi liang : Electric railway power supply and power quality. Beijing Shi : Zhongguo dian li chu ban she, 2011.

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Some notes on the consolidation of two systems of electric supply. Ottawa : [s.n., 1992.

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Chapitres de livres sur le sujet "Railway power supply"

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Liu, Linya, et Zifeng Zhong. « High-Speed Railway Power Supply System ». Dans Introduction to High-Speed Railway, 93–144. Singapore : Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-6423-9_3.

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Yang, Hao, Guosheng Huang, Kaixiang Ma, Meng Cui et Shuo Zhang. « Optical Storage Emergency Power Supply Technology for Railway Locomotive ». Dans Lecture Notes in Electrical Engineering, 31–41. Singapore : Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-7393-4_4.

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Wang, Bin, Xu dong Han, Shi bin Gao, Wen Huang et Xiao feng Jiang. « Harmonic Power Flow Calculation for High-Speed Railway Traction Power Supply System ». Dans Proceedings of the 2013 International Conference on Electrical and Information Technologies for Rail Transportation (EITRT2013)-Volume I, 11–25. Berlin, Heidelberg : Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-53778-3_2.

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Lao, Keng-Weng, Man-Chung Wong et NingYi Dai. « Introduction ». Dans Co-phase Traction Power Supply with Railway Hybrid Power Quality Conditioner, 1–35. Singapore : Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0438-5_1.

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Lao, Keng-Weng, Man-Chung Wong et NingYi Dai. « Co-phase Traction Power Supply with Railway HPQC : Modeling, Control, and Advantages Over System with RPC ». Dans Co-phase Traction Power Supply with Railway Hybrid Power Quality Conditioner, 37–64. Singapore : Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0438-5_2.

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Lao, Keng-Weng, Man-Chung Wong et NingYi Dai. « Minimum Operation Voltage Design of Co-phase Traction Power with Railway HPQC for Steady Rated Load ». Dans Co-phase Traction Power Supply with Railway Hybrid Power Quality Conditioner, 65–111. Singapore : Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0438-5_3.

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Lao, Keng-Weng, Man-Chung Wong et NingYi Dai. « Various Design Techniques of Co-phase Traction Power with Railway HPQC for Varying Load ». Dans Co-phase Traction Power Supply with Railway Hybrid Power Quality Conditioner, 113–84. Singapore : Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0438-5_4.

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Lao, Keng-Weng, Man-Chung Wong et NingYi Dai. « Partial Compensation Control in Co-phase Traction Power for Device Rating Reduction ». Dans Co-phase Traction Power Supply with Railway Hybrid Power Quality Conditioner, 185–204. Singapore : Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0438-5_5.

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Lao, Keng-Weng, Man-Chung Wong et NingYi Dai. « Hardware Construction and Experimental Results ». Dans Co-phase Traction Power Supply with Railway Hybrid Power Quality Conditioner, 205–25. Singapore : Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0438-5_6.

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Lao, Keng-Weng, Man-Chung Wong et NingYi Dai. « Summary ». Dans Co-phase Traction Power Supply with Railway Hybrid Power Quality Conditioner, 227–33. Singapore : Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0438-5_7.

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Actes de conférences sur le sujet "Railway power supply"

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Kryukov, Andrey, Aleksandr Cherepanov et Fesak Iliya. « Application of Power Transmission Lines with Backup Wire in Railway Power Supply Systems ». Dans 2024 International Ural Conference on Electrical Power Engineering (UralCon), 674–80. IEEE, 2024. http://dx.doi.org/10.1109/uralcon62137.2024.10718905.

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Taike, Kasumi, Kota Minaminosono, Junichi Shiraishi, Takashi Ozaki, Takashi Suzuki et Hitoshi Hayashiya. « Research of the PV Power Plant Installed in Electric Railway Power Supply Grid ». Dans 2024 13th International Conference on Renewable Energy Research and Applications (ICRERA), 498–502. IEEE, 2024. https://doi.org/10.1109/icrera62673.2024.10815362.

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van Deursen, A. P. J., H. W. M. Smulders, R. A. A. de Graaff et J. B. M. van Waes. « Characterization of at Railway Traction Power Supply, Measurement System and Results ». Dans 2004_EMC-Europe_Eindhoven, 1–4. IEEE, 2004. https://doi.org/10.23919/emc.2004.10805930.

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Zhong, Fan, Xinyao Hu et Shaofeng Xie. « Low-Frequency Oscillation Assessment of Traction Power Supply System Integrated with Railway Power Conditioner ». Dans 2024 The 9th International Conference on Power and Renewable Energy (ICPRE), 1496–501. IEEE, 2024. https://doi.org/10.1109/icpre62586.2024.10768308.

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Ablayeva, Aliye V., Natalya V. Yaronova et Otaxon O. Ruzimov. « Ensuring a Reliable Power Supply for Railway Traffic Lights Using Renewable Energy Sources ». Dans 2024 International Ural Conference on Electrical Power Engineering (UralCon), 600–604. IEEE, 2024. http://dx.doi.org/10.1109/uralcon62137.2024.10718877.

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Brenna, Morris, Federica Foiadelli et Dario Zaninelli. « Bidirectional ESS for railway power supply ». Dans 2013 Convegno Nazionale AEIT : Innovation and Scientific and Technical Culture for Development (AEIT). IEEE, 2013. http://dx.doi.org/10.1109/aeit.2013.6666808.

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Valeriy, Kuznetsov, Sychenko Viktor, Hubskyi Petro, Sergiy Myamlin, Kosariev Yevhen et Liashuk Vitalij. « Hybrid railway traction power supply system ». Dans 2020 IEEE 4th International Conference on Intelligent Energy and Power Systems (IEPS). IEEE, 2020. http://dx.doi.org/10.1109/ieps51250.2020.9263194.

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Abrahamsson, Lars, Daniel Serrano Jimenez, John Laury et Math Bollen. « AC Cables Strengthening Railway Low Frequency AC Power Supply Systems ». Dans 2017 Joint Rail Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/jrc2017-2258.

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In present-day railway power supply systems using an AC frequency lower than the one in the public power system of 50/60 Hz, high voltage overhead transmission lines are used as one measure of strengthening the railway power supply system grids. This option may be economically beneficial, compared to strengthening the grid purely by increasing the density of converter stations or increasing the cross section areas of the overhead catenary wires. High voltage AC transmission lines in the railway power supply system allow larger distances between converter stations than would otherwise be possible for a given amount of train traffic. Moreover, the introduction of AC transmission lines implies reduced line losses and reduced voltage level fluctuations at the catenary for a given amount of train traffic. However, due to the increased public and government resistance for additional overhead high voltage AC transmission lines in general, different alternatives will be needed for the future improvements and strengthening of railway power systems. For a more sustainable transport sector, the share and amount of railway traffic needs to increase, in which case such a strengthening becomes inevitable. Earlier, usage of VSC-HVDC transmission cables has been proposed as one alternative to overhead AC transmission lines. One of the main benefits with VSC-HVDC transmission is that control of power flows in the railway power systems is easier and that less converter capacity may be needed. Technically, VSC-HVDC transmission for railway power systems is a competitive solution as it offers a large variety of control options. However, there might be other more economical alternatives reducing the overall impedance in the railway power system. In public power systems with the frequency of 50/60 Hz, an excess of reactive power production in lowly utilized cables imposes an obstacle in replacing overhead transmission lines with cables. In low frequency AC railway power system, the capacitive properties are less significant allowing longer cables compared to 50/60 Hz power systems. Moreover, in converter-fed railways, some kind of reactive compensation will automatically be applied during low-load. At each converter station, voltage control is already present following the railway operation tradition. Therefore, in this paper, we propose AC cables as a measure of strengthening low-frequency AC railway power systems. The paper compares the electrical performances of two alternative reinforcement cable solutions with the base case of no reinforcement. The options of disconnecting or toggling the cables at low load as well as the automatic reactive compensation by converter voltage control are considered. Losses and voltage levels are compared for the different solutions. Investment costs and other relevant issues are discussed.
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Downey, D. « Dublin LUAS project : power supply systems ». Dans IEE Recent Developments in Railway Electrification Seminar. IEE, 2004. http://dx.doi.org/10.1049/ic:20040041.

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Stephan, A. « OpenPowerNet – simulation of railway power supply systems ». Dans COMPRAIL 2008. Southampton, UK : WIT Press, 2008. http://dx.doi.org/10.2495/cr080441.

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