公开(公告)号：EP2894653A4

公开(公告)日：2016-06-22

申请号：EP12884313

申请日：2012-09-05

申请人： MITSUBISHI ELECTRIC CORP

发明人： TAKEDA TOSHINOBU ,  KIKUCHI KUNIO ,  MIYASHITA MAKOTO ,  KAMEI KENJI ,  HORINOUCHI YUSAKU ,  HIRATSUKA MASAKI ,  TOKOYODA SHO ,  TAHATA KAZUYORI

IPC分类号： H01H33/59

CPC分类号： H01H33/596 ,  H02H3/087

公开(公告)号：EP3206217A4

公开(公告)日：2018-04-04

申请号：EP15848570

申请日：2015-06-10

申请人： MITSUBISHI ELECTRIC CORP

发明人： KA SHIKEN ,  ITO HIROKI ,  KIKUCHI KUNIO ,  MIYASHITA MAKOTO ,  TAHATA KAZUYORI ,  TOKOYODA SHO ,  KAMEI KENJI

IPC分类号： H01H33/59 ,  H01F27/24 ,  H01F38/40 ,  H01H9/54 ,  H01H9/56

CPC分类号： H01H9/54 ,  H01F27/24 ,  H01F38/40 ,  H01H9/542 ,  H01H9/56 ,  H01H33/596 ,  H01H33/66 ,  H01H71/24 ,  H01H89/00 ,  H01H2009/543

摘要： A direct-current circuit includes: a breaker (2) that is inserted into the direct-current line (1) and becomes a path for direct current when in a steady state; a resonance circuit (4) connected in parallel with the breaker (2) and superimposing resonance current on the direct current; a disconnector (3a) connected at one end to a first connection point of the breaker (2) and the resonance circuit (4) and forming a path for the direct current together with the breaker (2); and a disconnector (3b) connected at one end to a second connection point of the breaker (2) and the resonance circuit (4) and forming a path for the direct current together with the breaker (2). The resonance circuit (4) includes a series circuit that includes a capacitor (5) and a reactor (6) and generates the resonance current, a charging resistor (9) for charging the capacitor (5) with a direct-current potential of the direct-current line (1), a high-speed switch (7) connected in series with the series circuit on the capacitor (5) side and superimposing the resonance current on the direct current, and an arrester (8) connected in parallel with the capacitor (5) and the high-speed switch (7).

公开(公告)号：EP3197042A4

公开(公告)日：2018-05-23

申请号：EP14902226

申请日：2014-09-16

申请人： MITSUBISHI ELECTRIC CORP

发明人： TAHATA KAZUYORI ,  KIKUCHI KUNIO ,  MIYASHITA MAKOTO ,  KAMEI KENJI ,  TOKOYODA SHO

IPC分类号： H02P9/00 ,  F03D9/25 ,  H01H9/56 ,  H02H3/087 ,  H02H7/22 ,  H02H9/02 ,  H02J1/10 ,  H02J3/36 ,  H02J3/38 ,  H02P9/10

CPC分类号： F03D9/257 ,  H01H9/56 ,  H02H3/087 ,  H02H7/22 ,  H02H9/02 ,  H02J1/108 ,  H02J3/36 ,  H02J3/386 ,  H02P9/00 ,  H02P9/10 ,  Y02E10/72

摘要： A wind power generation system according to the present invention includes: a DC bus (4); a plurality of feeders (3) connected to the DC bus (4) for transmitting DC powers to the DC bus (4); a plurality of wind power generators (1); a plurality of AC/DC converters (2) connected one by one to each of the wind power generators (1) for converting AC powers generated by the connected wind power generators (1), into DC powers, and outputting the DC powers to the feeders (3); and a DC breaker (5) and a diode (6), which serve as a current limiting unit installed on each of the feeders (3) for preventing a DC current from flowing from the DC bus (4) into the feeder (3).

公开(公告)号：EP3107172A4

公开(公告)日：2018-04-04

申请号：EP14882204

申请日：2014-02-14

申请人： MITSUBISHI ELECTRIC CORP

发明人： TAHATA KAZUYORI ,  ITO HIROKI ,  KIKUCHI KUNIO ,  MIYASHITA MAKOTO ,  KAMEI KENJI

IPC分类号： H02J1/00 ,  H02H3/02 ,  H02H3/087 ,  H02H7/125 ,  H02H9/02 ,  H02M7/12

CPC分类号： H02M7/155 ,  H02H3/021 ,  H02H3/087 ,  H02H7/1257 ,  H02H9/025 ,  H02J5/00 ,  H02M1/32 ,  H02M7/02 ,  H02M7/125 ,  H02M7/217 ,  H02M7/48

摘要： An AC circuit breaker 3 is provided between an AC system 1 and an AC-DC converter 5, and a DC circuit breaker 7 is provided between a DC line 6 and the AC-DC converter 5. A bypass switch capable of short-circuiting a converter cell included in the AC-DC converter 5 is connected to the AC-DC converter 5. At the time of a fault in the DC line 6, the bypass switch is turned on to interrupt the supply of DC power from the AC system 1 to the DC line 6.