POWER CONVERSION DEVICE

WIPO Patent Application WO/2014/132396

A1

The purpose of the invention is to obtain a power conversion device used in a DC power transmission system in which a plurality of power supply systems are connected therebetween by a DC line and interconnected with each other and being capable of preventing accidental current from flowing while suppressing an electricity transmission loss during a normal time, without causing the size of the equipment to increase and without causing the cost to increase. The power conversion device comprises: a converter (2) for performing power conversion between power supply systems (20-1, 20-2) and a DC power transmission system; and a current-limiting circuit (5) provided between the converter (2) and a DC line (1) and consisting of a current-limiting element (4) and an opening and closing device (3) connected in parallel with the current-limiting element (4). When the current flowing through the converter (2) exceeds a threshold value that is lower than the upper limit value of allowable current of the converter (2), the opening and closing device (3) is controlled to open.

TAHATA KAZUYORI (JP)
ITO HIROKI (JP)
KIKUCHI KUNIO (JP)
KAMEI KENJI (JP)
TAKEDA TOSHINOBU (JP)

PCT/JP2013/055435

September 04, 2014

February 28, 2013

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MITSUBISHI ELECTRIC CORP (JP)
TAHATA KAZUYORI (JP)
ITO HIROKI (JP)
KIKUCHI KUNIO (JP)
KAMEI KENJI (JP)
TAKEDA TOSHINOBU (JP)

H02J3/36; H02H9/02; H02J1/00

JPH0670457A	1994-03-11
JPH0578146U	1993-10-22
JPS5911738A	1984-01-21
JP2001178148A	2001-06-29

SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)

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