DC Component From Pantograph Arcing in AC Traction System-Influencing Parameters, Impact, and Mitigation Techniques
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
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
IEEE conference proceedings, 2011. Vol. 53, no 1, 18-27 p.
Arc discharges, electromagnetic compatibility, electromagnetic interference, rail transportation, rail transportation power systems
Control Engineering Vehicle Engineering Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject Electrical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-14318DOI: 10.1109/TEMC.2010.2045159ISI: 000287407300003ScopusID: 2-s2.0-79951931347OAI: oai:DiVA.org:kth-14318DiVA: diva2:332208
QC 20100803. Updated from submitted to published, 20120315. Previous title: Component from Pantograph Arcing in AC Traction System- Influencing Parameters, Impact and Mitigation Techniques2010-08-032010-08-032016-02-22Bibliographically approved