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Rodriguez, Emilio
Publications (3 of 3) Show all publications
Rodriguez, E., Simon, V., Galar, D., Berges, L. & Tamarit, J. (2014). El impacto de la complejidad de la electrónica en la seguridad del sistema ferroviario (ed.). Mantenimiento (280), 17-23
Open this publication in new window or tab >>El impacto de la complejidad de la electrónica en la seguridad del sistema ferroviario
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2014 (Spanish)In: Mantenimiento, ISSN 0214-4344, no 280, p. 17-23Article in journal (Refereed) Published
Abstract [es]

La complejidad del sistema ferroviario aumenta cuando se utiliza más electrónica. Cuando se introducen nuevos trenes equipados con componentes electrónicos importantes en una infraestructura ferroviaria que no ha sido renovada en los últimos años, como la sueca, puede surgir uno de los problemas más relevantes de ferrocarril: el sistema de parada de emergencia activa los frenos del material rodante, causando largos retrasos con efectos en cascada. La causa es que el TCC (centro de control de trenes) puede detectar señales inesperadas debido a los campos electromagnéticos transitorios que puedan interferir en los circuitos de señalización y control.

Keywords
Railway, Electric power system, Signalling in railway, Track circuits, EMC, EMI impact, Operation, Interoperability, Reliability, Information technology - Telecommunication, Informationsteknik - Telekommunikation
National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
urn:nbn:se:ltu:diva-11264 (URN)a325958c-9950-427a-9db0-03872441f434 (Local ID)a325958c-9950-427a-9db0-03872441f434 (Archive number)a325958c-9950-427a-9db0-03872441f434 (OAI)
Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Rodriguez, E., Simon, V., Galar, D. & Niska, S. (2014). Safety Issues of Track Circuits: A Hybrid Approach (ed.). Paper presented at . Communications in Dependability and Quality Management, 17(2), 15-26, Article ID 209636620.
Open this publication in new window or tab >>Safety Issues of Track Circuits: A Hybrid Approach
2014 (English)In: Communications in Dependability and Quality Management, ISSN 1450-7196, Vol. 17, no 2, p. 15-26, article id 209636620Article in journal (Refereed) Published
Abstract [en]

The study of railway electromagnetic interference (EMI) seeks to determine the source of the interference or to ensure the correct operation of the equipment within adverse conditions. The complexity of railway system increases when more electronics are used. However a simple DC track circuit is still used in train detection systems in many countries, including Sweden, our case study. Most of the failures reported in the Swedish railway infrastructure are related to the detection system, making this research of interest to the railway community. By searching the Swedish failures report database, 0FELIA, for the most repetitive and probable causes of failures, they were identified three worst case scenarios: low resistance between the rails, external interference as a lightning and iron-powder-bridges in the insulated joint. They were simulated using the software CST STUDIO SUITE® (Computer Simulation Technology Studio Suite), supported by real measurements on site. Measurements followed the current EMC standards and were used to tune and validate the models, resulting in simulations very close to the real measures.

Keywords
Signalling in railway, Track circuit, EMC, EMI impact, Train operation, Interoperability, Reliability, Technology - Electrical engineering, electronics and photonics, Teknikvetenskap - Elektroteknik, elektronik och fotonik
National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
urn:nbn:se:ltu:diva-7135 (URN)5758ec50-e4fb-4d2d-9902-a91a5c0ed1bf (Local ID)5758ec50-e4fb-4d2d-9902-a91a5c0ed1bf (Archive number)5758ec50-e4fb-4d2d-9902-a91a5c0ed1bf (OAI)
Note
Godkänd; 2014; 20141025 (emirod)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Rodriguez, E. (2014). Track circuits’ robustness: Modeling, measurement and simulation (ed.). (Licentiate dissertation). Paper presented at .
Open this publication in new window or tab >>Track circuits’ robustness: Modeling, measurement and simulation
2014 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

In countries with rough weather conditions, frequent delays cause railway companies to waste time and money. Many of these delays are related to the train detection systems, as the old DC track circuits are still used in some countries, including Sweden, our case study. Since the most important factor in the railway system is safety, in some cases, the train detection system gets incorrect information and detects a non-existent train. The train slows down to avoid a problem in the track (with other trains or other faults), causing prolonged delays with cascading effects. The analysis in this licentiate contributes to the detection and reduction of TC failures; this, in turn, will save money for the railway community.A classification of the most probable causes of failures related to the train detection system was derived from the Swedish failures report database 0FELIA. After classifying failures, we focussed on the three most common worst case scenarios: low resistance between the rails, external interference such as a lightning strike, and iron-powder-bridges in the insulated joint.Electromagnetic interferences (EMI) are a problem for the railway system in general. One source of electromagnetic (EM) transients is the return current harmonic produced by the engine of the rolling stock itself. In the first stage of this licentiate, we implemented a Matlab model of the power supply system of the Swedish railway infrastructure, using the characteristics and previous measures of a real source. A model of a train as an active load validated by the manufacturer was integrated as a subsystem in different positions of the infrastructure. This method was used to study the behaviour of the low frequency system from an electrical point of view but it could also be used as input for an electromagnetic model using high frequencies. The model was validated through measurements taken in northern Sweden.In addition, a 3D model of the whole railway system was proposed. The simulation software was CST STUDIO SUITE® (Computer Simulation Technology Studio Suite), supported by real measurements on site and the lab to tune and validate the model. The results of the simulation show that the model fits with reality and is reliable for the study of track circuit sections.Some measurements followed the current standards, but we also analysed points not covered by them, allowing us to update the current standards

Publisher
p. 244
Series
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757
Keywords
Track circuit, Relay, False positive signals, Signalling in railway, Modelling, Simulation, Testing, Robustness, Interoperability, Reliability, Railway Infrastructure, Technology - Electrical engineering, electronics and photonics, Information technology - Telecommunication, Information technology - Computer engineering, Technology - Engineering physics, Information technology - Systems engineering, Teknikvetenskap - Elektroteknik, elektronik och fotonik, Informationsteknik - Telekommunikation, Informationsteknik - Datorteknik, Teknikvetenskap - Teknisk fysik, Informationsteknik - Systemteknik
National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
urn:nbn:se:ltu:diva-18002 (URN)6564eb9f-06b3-4807-aa55-d20196d84b65 (Local ID)978-91-7583-045-2 (ISBN)978-91-7583-046-9 (ISBN)6564eb9f-06b3-4807-aa55-d20196d84b65 (Archive number)6564eb9f-06b3-4807-aa55-d20196d84b65 (OAI)
Note
Godkänd; 2014; 20140924 (emirod); Nedanstående person kommer att hålla licentiatseminarium för avläggande av teknologie licentiatexamen. Namn: Emilio Rodríguez Martínez Ämne: Drift och underhållsteknik/Operation and Maintenance Uppsats: Track Circuits’ Robustness – Modeling, Measurement and Simulation Examinator: Professor Diego Galar Pascual, Institutionen för samhällsbyggnad och naturresurser, Luleå tekniska universitet Diskutant: Professor Ajit Kumar Verma, Haugesund University College Tid: Torsdag 20 november 2014, kl 10:00 Plats: F236, Luleå tekniska universitetAvailable from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
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