Quarterly Report of RTRI
Online ISSN : 1880-1765
Print ISSN : 0033-9008
ISSN-L : 0033-9008
PAPERS
Method for Detecting DC High-resistance Ground Faults with High Current Arcs in DC Traction Systems
Hiroaki MORIMOTOMasataka AKAGIKiyonobu HIGUCHITsurugi YOSHII
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2021 Volume 62 Issue 2 Pages 92-97

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Abstract

The detection of high-resistance ground faults in DC 1.5 kV traction power supply systems has remained an unresolved problem for years. There are several methods to detect such faults using additional devices and/or wires installed along tracks. However, due to cost and maintenance problems, there has been a demand for a fault detection method which uses only electrical measurements inside traction substations. To this end, we analyzed a recorded current waveform of an actual fault to find out its characteristics. Based on the results obtained, we proposed a novel method for detecting high-resistance ground faults with a discharging arc of more than a thousand amperes DC current.

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© 2021 by Railway Technical Research Institute
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