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The Impact of Sympathetic Magnetisation Transients on Harmonic Filters in Auto-Transformer Fed Railway Traction Applications

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Open access
Authors
Wolfs, Peter
Date
2009
Type
Conference Paper

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Wolfs, Peter. 2009. The Impact of Sympathetic Magnetisation Transients on Harmonic Filters in Auto-Transformer Fed Railway Traction Applications, in Nesimi Ertugrul (ed), Australasian Universities Power Engineering Conference AUPEC 2009, Sep 27 2009. Adelaide, SA: The University of Adelaide.
Source Title
Australasian Universities Power Engineering Conference
Source Conference
Australasian Universities Power Engineering Conference AUPEC 2009
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Faculty
Department of Electrical and Computer Engineering
School of Engineering
Faculty of Science and Engineering
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Abstract

The operation of mixed fleets of modern PWM rectifier and older thyristor locomotives and the tightening of harmonic emission standards globally will lead to more complex harmonic filter installations in railway applications. This paper shows that track switching operations in an auto-transformer fed system can generate sympathetic transformer magnetization currents that have very significant magnitudes, high harmonic content and last for some seconds. A sympathetic transient can occur when un-energized auto-transformers are switched into service and paralleled with energized transformers at the feeder station or in adjacent track sections. The harmonic loads imposed by these currents need to be considered in the design of the harmonic filter elements and protection.