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DC Component From Pantograph Arcing in AC Traction System: Influencing Parameters, Impact, and Mitigation Techniques
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
Dept of Power Technologies, ABB Corporate Research, Västerås.
Rejlers Ingenjörer AB, Västerås.
Electric Power Engineering and Design, KTH, Stockholm.
2011 (English)In: IEEE transactions on electromagnetic compatibility (Print), ISSN 0018-9375, E-ISSN 1558-187X, Vol. 53, no 1, 18-27 p.Article in journal (Refereed) Published
Abstract [en]

Pantograph arcing in ac traction system generates transients, and causes asymmetries and distortion in supply voltage and current waveforms. These asymmetric voltage and current lead to a net dc component and harmonics that propagate within the traction power and signalling system and cause electromagnetic interference. This problem is enhanced during winter because of the layer of ice/snow on the overhead contact wire. The sliding contact becomes poor and a visible arc moves along with the pantograph. In this paper, it is shown how different parameters like traction current, line speed, power factor, and supply voltage influence the arcing, its characteristics, and the dc components. It is shown that the dc current component increases with increasing train speed and traction current, and reduces at a lower power factor. It is also discussed how the presence of an ice layer influences the arcing and the dc components. It is found that running the trains below the normal operating power factors is an effective choice to mitigate this problem. The findings presented in this paper could be beneficial to estimate the probable limit of the dc component at the planning stage so that proper precautions can be taken at the design stage itself.

Place, publisher, year, edition, pages
2011. Vol. 53, no 1, 18-27 p.
Keyword [en]
arcs (electric), electromagnetic interference, interference suppression, pantographs, power factor, power overhead lines, railway electrification, signalling, traction power supplies, AC traction system, DC component, current waveforms, overhead contact wire, pantograph arcing, power factors, signalling system, supply voltage
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Science of Electricity
URN: urn:nbn:se:uu:diva-164214DOI: 10.1109/TEMC.2010.2045159OAI: oai:DiVA.org:uu-164214DiVA: diva2:466829
Available from: 2011-12-16 Created: 2011-12-16 Last updated: 2016-04-20Bibliographically approved

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