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Pantograph arcing in electrified railways-mechanism and influence of various parameters-Part II: with AC traction power supply
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
2009 (English)In: IEEE Transactions on Power Delivery, ISSN 0885-8977, Vol. 24, no 4, 1940-50 p.Article in journal (Refereed) Published
Abstract [en]

Pantograph arcing with AC supply generates transients, cause asymmetries and distortion in supply voltage and current waveforms and can damage the pantograph and the overhead contact line. The asymmetry generates a net dc component and harmonics, which propagate within the traction power and signalling system and causes electromagnetic interference. Unlike DC-fed systems (Part I), the arcing in ac supply is complex because of the zero crossing of currents and voltages. In this paper, we discuss the mechanisms of sliding contact and arcing between pantograph-contact wire using the experimental setup described in Part I. Influences of various parameters and test conditions on arcing phenomenon and their signature patterns on the supply voltage and current waveforms are presented. It is shown how the arcing mechanism and corresponding asymmetry in the voltage and current waveforms are governed by line speed, current, supply voltage, inductive load, and pantograph material. The asymmetry in the current waveform is mainly due to the difference in the duration of successive zero-current regions and uneven distortion of the waveshapes. This, in turn, creates the asymmetry in the voltage waveform. The findings presented in this paper could be beneficial for coming up with appropriate mitigation techniques from the electromagnetic interference due to pantograph arcing in AC traction systems.

Place, publisher, year, edition, pages
USA: IEEE , 2009. Vol. 24, no 4, 1940-50 p.
Keyword [en]
arcs (electric), pantographs, railway electrification, traction power supplies
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-113152DOI: 10.1109/TPWRD.2009.2021036ISBN: 0885-8977 OAI: oai:DiVA.org:uu-113152DiVA: diva2:289884
Note

10880717 electrified railway AC traction power supply pantograph arcing electromagnetic interference mitigation sliding contact mechanism signalling system DC-fed system signature pattern voltage-current waveform

Available from: 2010-01-25 Created: 2010-01-25 Last updated: 2016-04-14Bibliographically approved

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Midya, SurajitThottappillil, Rajeev

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