Central Japan Railway Company

Yuichi Ahiko

Hiroki Shimoyama

Kotaro Nakamura

Provided is a collected current monitoring device enabling an analysis of collected current in each current collector while allowing a reduced equipment cost. The collected current monitoring device of the present disclosure is installed in a railroad vehicle including current collectors, main transformers, and main converters. The collected current monitoring device includes: a supply current sensor configured to measure a current supplied to a freely-selected one of the main transformers, at least one current-sensor-between-current-collectors disposed in each communication path connecting two adjacent ones of the current collectors and configured to measure a current flowing in the communication path, and a processor configured to calculate a current flowing in each of the current collectors based on the current measured by the supply current sensor and the current measured by the at least one current-sensor-between-current-collectors, and on a distribution ratio of the currents supplied to the main transformers.

Collected current monitoring device

Provided is a collected current monitoring device. A transformer current acquisition unit acquires a current value Iof a current flowing through a part of a plurality of transformers. A total collected current calculation unit calculates a current value Iof a collected current supplied by a plurality of current collectors from the current value Iby using a following Equation (1): I=I&#xd7;(M/M). A collected current acquisition unit acquires a current value Iof a collected current supplied by the current collector(s) other than one current collector. The collected current calculation unit calculates a current value Iof a collected current supplied by the one current collector by subtracting the current value Ifrom the current value I.

A collected-current monitoring device includes a current-value obtaining unit for obtaining current values Iand I; a first RMS-calculation unit for calculating a root mean square (RMS)of the current value Iat a window width W; a second RMS-calculation unit for calculating a root mean square (RMS)of the current value Iat the window width W; a determining unit for determining whether a combination of the RMSand the RMSsatisfies an abnormality condition; an abnormality-signal output unit for outputting an abnormality signal when the abnormality condition is satisfied; an information-obtaining unit for obtaining railway vehicle information; and a setting unit for setting a set-parameter that includes at least one of the window width W or the abnormality condition depending on the railway vehicle information.

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Nagoya, Japan

Yuichi Ahiko