Protection of a Static Frequency Converter fed traction network, a case study

Perin, Igor & Walker, Geoffrey R. (2015) Protection of a Static Frequency Converter fed traction network, a case study. In 2015 Australasian Universities Power Engineering Conference (AUPEC), IEEE, Wollongong, N.S.W, pp. 1-6.

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Abstract

Aurizon, Australia's largest rail freight operator, is introducing the Static Frequency Converter (SFC) technology into its electric railway network as part of the Bauhinia Electrification Project. The introduction of SFCs has significant implications on the protection systems of the 50kV traction network. The traditional distance protection calculation method does not work in this configuration because of the effect that the SFC in combination with the remote grid has on the apparent impedance, and was substantially reviewed. The standard overcurrent (OC) protection scheme is not suitable due to the minimum fault level being below the maximum load level and was revised to incorporate directionality and under-voltage inhibit. Delta protection was reviewed to improve sensitivity. A new protection function was introduced to prevent back-feeding faults in the transmission network through the grid connection. Protection inter-tripping was included to ensure selectivity between the SFC protection and the system downstream.

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ID Code: 92802
Item Type: Conference Paper
Refereed: Yes
DOI: 10.1109/AUPEC.2015.7324788
ISBN: 9781479987252
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 11 Feb 2016 02:12
Last Modified: 11 Feb 2016 22:42

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