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Sources and propagation of eectromagnetic transients in railway systems, S01-3915/08. Final Report
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.ORCID iD: 0000-0002-4133-3317
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2005 (English)Report (Other academic)
Abstract [en]

The railway system is continuously being updated. Upgrading axle loads, introducing new engines with increasing power needs and advanced motor control give unwanted electromagnetic consequences for electronic-, telecommunication-, and signalling systems along the track. This can, for example, lead to failure in detector systems and traffic control systems and increased cost due to corrective maintenance. This research project was initiated with the purpose of understanding origin and propagation of radiated and conducted electromagnetic transients in the railway system. To investigate the problem of radiated and conducted electromagnetic interference, it has been necessary to develop new measuring methods. Measurements have been conducted to determine if the more sensitive low voltage systems are influenced by higher voltage systems. An existing electromagnetic modeling tool has been utilized, to model crosstalk between the rails and the overhead line catenary system, and modified to incorporate a combination of two- and three- dimensional models to reduce time and space complexity. The resulting simulation environment can be used to analyze possible sources of electromagnetic disturbances in the coexisting signaling circuitry of today, and to reduce the influence of these sources. This gives a new application of the measurement method and further development of a simulation tool. One of the objectives in this project has been to find out the tolerance of the low voltage detector systems in presence of the higher voltage system used in the railways. One of the conclusions is that correct installation is important and that failure to comply with installation procedures results in high electromagnetic interference. There is no correlation between the presence of trains and randomly occurring disturbances.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2005.
Series
Research report / Luleå University of Technology, ISSN 1402-1528 ; 2005:07
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering Other Civil Engineering
Research subject
Industrial Electronics; Operation and Maintenance
Identifiers
URN: urn:nbn:se:ltu:diva-25479Local ID: f60c7f80-b29f-11db-bf9d-000ea68e967bOAI: oai:DiVA.org:ltu-25479DiVA, id: diva2:998531
Projects
Electromagnetic compatibility issues in the Swedish railway system
Note
Godkänd; 2005; 20070202 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Delsing, JerkerEkman, JonasNiska, StefanWisten, Åke

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