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Patent Searching and Data


Title:
ELECTRIC POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/136229
Kind Code:
A1
Abstract:
In order to obtain an electric power conversion device whereby equipment can be made more compact and cost less, and the time until restarting operation after an accident can be reduced, in a DC power transmission grid that connects a plurality of power supply grids using a DC line, the electric power conversion device comprises: a converter (3) that converts electric power between a power supply grid (1) and the DC power transmission grid; a reactor (4) connected between the converter (3) and the DC line (6); and a ground switching unit provided in an end section of the DC line (6) and comprising a current-limiting circuit (15) and a disconnector (12) connected in series, and a switch (16) connected in parallel to the current-limiting circuit (15). The electric power conversion device is configured such that during regular operation in which normal DC power transmission occurs, the disconnector (12) is controlled to be open and the switch (16) is controlled to be closed. When an accident occurs in the DC line (6), the disconnector (12) is turned ON after the power transmission between the power supply grid (1) and the converter (3) is cut. Once the arc at the accident point (arc section) (7) has been extinguished, the switch (16) is opened, the residual energy in the reactor (4) is consumed in the current-limiting circuit (15), then the disconnector (12) is opened, and operation is restarted.

Inventors:
TAKEDA TOSHINOBU (JP)
ITO HIROKI (JP)
KIKUCHI KUNIO (JP)
KAMEI KENJI (JP)
TAHATA KAZUYORI (JP)
HIRATSUKA MASAKI (JP)
TOKOYODA SHO (JP)
Application Number:
JP2013/056173
Publication Date:
September 12, 2014
Filing Date:
March 06, 2013
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
TAKEDA TOSHINOBU (JP)
ITO HIROKI (JP)
KIKUCHI KUNIO (JP)
KAMEI KENJI (JP)
TAHATA KAZUYORI (JP)
HIRATSUKA MASAKI (JP)
TOKOYODA SHO (JP)
International Classes:
H02H3/06; H02H9/02
Foreign References:
JP2000175451A2000-06-23
JPH0568328A1993-03-19
JPH0469011A1992-03-04
JPS59209016A1984-11-27
Other References:
See also references of EP 2966742A4
Attorney, Agent or Firm:
SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)
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