Hitachi, Ltd.

East Japan Railway Company

Osamu Sakuchi

Masaya Ichinose

Akira Bando

Yasuhiro Nakatsuka

Toru Yoshihara

Shuji Katoh

Tomomichi Ito

Masahiko Honda

Naomi Sato

Yasuhiro Kiyofuji

Shigenori Inoue

Yasuhiro Imazu

Jun Narushima

Takayoshi Yamamoto

Yoshio Eguchi

Toshihiko Usui

Masaki Uchita

Rikiya Inoue

Keiichi Yamashita

Feeder sections to be a target of interchange are to be expanded in order to improve the effect of power interchange between feeders. A control device for railway power conditioner is connected to a first feeder connected to a load side of a transformer in a first railway substation including a transformer receiving power from a power grid, and a second feeder connected to a load side of a transformer in a second railway substation including a transformer receiving power from a power grid, and decides an amount of power interchanged between the first and second feeders. The control device decides the amount of power interchanged between the first and second feeders, using the received power in the first railway substation and power on the first feeder, and the received power in the second railway substation and power on the second feeder.

Control device for railway power conditioner and control system for railway power conditioner

A switching element of a power converter generates a low voltage, using a current flowing in the power converter, and supplies a power to drive itself. A switching element of a power converter for conversion from direct current into alternate current or from alternate current into direct current includes: a terminal and a terminal which are used in building the switching element itself in the power converter; a capacitor, a high-side controllable switch and a low-side controllable switch enabling outputting the voltage of the capacitor, the voltage being output between the terminal and the terminal, and a self-supply power source for supplying a power to drive the bi-directional chopper switching element itself, using a current flowing in the capacitor.

Switching element, power converter, direct current transmission system, current control device, method of controlling power converter, and method of controlling current in voltage source converter

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Tokyo, Japan

Osamu Sakuchi