DC GROUND FAULT DETECTION SYSTEM AND DC GROUND FAULT DETECTION METHOD FOR DC ELECTRIC RAILWAY

WIPO Patent Application WO/2018/198438

A1

The purpose of the present invention is to enable a ground fault accident zone to be accurately determined in a DC electric railway in which DC power is supplied to a train from a plurality of feeder substations through a feeder. Provided is a DC ground fault detection system comprising: a VLD control and data collection device 51, which is provided in each of a feeder zone of each of the feeder substations and has a short-circuit switch (VLD 50) that is interposed between a rail 37 and a ground 38 and configured to be closed when a rail-to-ground voltage becomes equal to or higher than a set voltage, the VLD control and data collection device 51 collecting electric information including the rail-to-ground voltage and a current that passes through the short-circuit switch after the short-circuit switch is closed; and a ground fault determination device 60 for determining, on the basis of the electric information collected by the VLD control and data collection device 51, a ground fault accident by using a current value, an energization time, and an energization direction of the current passing through the short-circuit switch.

IKEDA HIROTO (JP)
FUKUDA KAZUO (JP)

PCT/JP2017/047213

November 01, 2018

December 28, 2017

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MEIDENSHA ELECTRIC MFG CO LTD (JP)

H02H3/16; B60M3/00; H02H3/00

JP2015067241A	2015-04-13
JP2011055685A	2011-03-17
JP2000201427A	2000-07-18

See also references of EP 3614513A4
"Latest Technologies of Electric Railway (Revised Edition", March 2012, CORONA PUBLISHING CO., LTD, pages: 163

KOBAYASHI, Hiromichi et al. (JP)

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