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    CONVERTER VALVE FAULT WARNING METHOD AND SYSTEM
    1.
    发明公开
    CONVERTER VALVE FAULT WARNING METHOD AND SYSTEM 审中-公开

    公开(公告)号：EP3376637A1

    公开(公告)日：2018-09-19

    申请号：EP17759247.4

    申请日：2017-03-01

    申请人： NR Electric Co., Ltd. ,  NR Electric Engineering Co., Ltd.

    发明人： GAO, Shengfu ,  FANG, Taixun ,  WANG, Yongping ,  ZHANG, Xiang ,  PAN, Weiming ,  YUAN, Ming ,  ZHOU, Guqing

    IPC分类号： H02J13/00 ,  G01R31/08

    CPC分类号： G01R31/08 ,  H02H1/00 ,  H02J13/00 ,  H02M1/088 ,  H02M1/32 ,  H02M7/7575 ,  Y02E60/725 ,  Y04S10/20

    摘要： Disclosed is a method for providing warning about a failure in a converter valve. The method comprises: within a predetermined time range, recording time information of status indication signals fed back by thyristor control units (TCU) of a converter valve, performing statistics and comparison of the pieces of time information using a bias statistics method, marking a thyristor level whose bias exceeds a preset value, and determining a probability of failure in the thyristor according to the marking result. Also disclosed is a system for providing warning about a failure in a converter valve. The system comprises a register array used to store bias data of thyristor levels of a converter valve and a high-speed processor used to process, using a bias statistics method, status indication signals fed back by TCUs. The solution of the present invention can identify a thyristor level with a relatively high probability of failure, achieve early warning, and provide a reference for device replacement, thereby reducing a probability of outage of a direct current system due to a failure of a thyristor level, and providing references for device performance optimization and circuit design optimization of a converter valve.

    THYRISTOR ASSEMBLY RADIATOR FOR DC CONVERTER VALVE
    2.
    发明公开
    THYRISTOR ASSEMBLY RADIATOR FOR DC CONVERTER VALVE 审中-公开
    直流转换阀用THYRISTOR组装散热器

    公开(公告)号：EP3316293A1

    公开(公告)日：2018-05-02

    申请号：EP16829756.2

    申请日：2016-07-13

    申请人： NR Electric Co., Ltd. ,  NR Engineering Co., Ltd ,  NR Electric Power Electronics Co., Ltd.

    发明人： ZHANG, Xiang ,  FANG, Taixun ,  CAO, Dongming ,  CHEN, Chihan ,  ZHANG, Guangtai ,  LIU, Haibin

    IPC分类号： H01L23/473 ,  H01L23/367 ,  H03K17/72

    CPC分类号： H01L23/473 ,  H01C1/08 ,  H01L23/367 ,  H01L25/117 ,  H03K17/72

    摘要： A thyristor assembly radiator for a DC converter valve. A water discharging port of an N th radiator is communicated with a water discharging port of an (N-2) th radiator. A water feeding port of the N th radiator is communicated with a water feeding port of an (N+2) th radiator. Or, a water feeding port of the N th radiator is communicated with a water feeding port of the (N-2) th radiator, and a water discharging port of the N th radiator is communicated with a water discharging port of the (N+2) th radiator. A water discharging port of an M th radiator is communicated with a water discharging port of an (M-2) th radiator, and a water feeding port of the M th radiator is communicated with a water feeding port of an (M+2) th radiator, or a water feeding port of an M th radiator is communicated with a water feeding port of the (M-2) th radiator, and a water discharging port of the M th radiator is communicated with a water discharging port of an (M+2) th radiator. Water feeding ports of the last two radiators are communicated. According to the radiator, the number of joints of a cooling system is reduced, the risk of leakage is lowered, the operation reliability of a converter valve is improved, the maintenance difficulty is lowered, and the maintenance time is shortened.

    摘要翻译： 用于直流转换器阀门的晶闸管组件散热器。 第N散热器的排水口与第（N-2）散热器的排水口连通。 第N散热器的给水口与第（N + 2）散热器的给水口连通。 或者，第N个散热器的进水口与第（N-2）个散热器的进水口连通，第N个散热器的出水口与第（N + 2）个散热器的出水口连通， th散热器。 第M散热器的出水口与第（M-2）散热器的出水口连通，第M散热器的给水口与第（M + 2）散热器的给水口连通 或者第M散热器的给水口与第（M-2）散热器的给水口连通，第M散热器的出水口与（M + 2）散热器的出水口连通， th散热器。 最后两个散热器的供水口相互通信。 根据散热器，减少了冷却系统的接头数量，降低了泄漏的风险，改善了换流阀的操作可靠性，维修难度降低，维修时间缩短。

    SOLID-STATE TRANSFORMER
    4.
    发明公开
    SOLID-STATE TRANSFORMER 审中-公开

    公开(公告)号：EP3958454A1

    公开(公告)日：2022-02-23

    申请号：EP20854635.8

    申请日：2020-07-15

    申请人： NR ELECTRIC CO., LTD. ,  NR Engineering Co., Ltd.

    发明人： ZHANG, Zhongfeng ,  XIE, Yeyuan ,  CAO, Dongming ,  FANG, Taixun ,  SHENG, Xiaodong ,  YANG, Chen ,  LIAN, Jianyang

    IPC分类号： H02M5/458

    摘要： A solid-state transformer comprises a plurality of power units (100). Each of the plurality of power units (100) comprises a high-voltage side module (110), a low-voltage side module (120), and an isolation transformer (130). The isolation transformer (130) comprises a high-voltage winding (131), a low-voltage winding (132), and an iron core (133). The high-voltage winding (131) is wound on the iron core (133) and connected to the high-voltage side module (110). The low-voltage winding (132) is wound on the iron core (133) and connected to the low-voltage side module (120). The iron core (133) is in near equipotential connection to the high-voltage side module (110) or the low-voltage side module (120) by means of a conductive medium to fix the floating potential of the iron core (133).

    CLOSING CONTROL METHOD FOR HIGH-VOLTAGE DIRECT-CURRENT CIRCUIT BREAKER
    6.
    发明公开
    CLOSING CONTROL METHOD FOR HIGH-VOLTAGE DIRECT-CURRENT CIRCUIT BREAKER 审中-公开

    公开(公告)号：EP3477809A1

    公开(公告)日：2019-05-01

    申请号：EP17838379.0

    申请日：2017-04-25

    申请人： NR Electric Co., Ltd. ,  NR Engineering Co., Ltd.

    发明人： SHI, Wei ,  YANG, Bing ,  LV, Wei ,  WANG, Wenjie ,  XIE, Yeyuan ,  FANG, Taixun ,  CAO, Dongming

    IPC分类号： H02H7/26

    摘要： A closing control method for a high-voltage DC circuit breaker. The method comprises: closing breaking units of the transfer branch (2) group by group, then closing the main branch (1), and finally open the transfer branch. During the process of closing the breaking units of the transfer branch group by group, determine whether there is a fault in the power transmission system after closing current breaking unit group. if there is no fault, proceed to close the next breaking unit group until all breaking unit groups are closed before proceeding to the next step; if there is a fault, all the breaking units that have been closed are opened and the closing operation is ended. The method can pre-charge the power transmission system during the closing process of the high-voltage DC circuit breaker, and lower the overvoltage and system oscillation caused by the closing operation.

    APPARATUS FOR LIMITING CURRENT OF CIRCUIT OR BREAKING CURRENT, AND CONTROL METHOD THEREOF
    7.
    发明公开
    APPARATUS FOR LIMITING CURRENT OF CIRCUIT OR BREAKING CURRENT, AND CONTROL METHOD THEREOF 有权
    设备以便在其限制了一个开关或控制方法电源和关闭

    公开(公告)号：EP2953150A1

    公开(公告)日：2015-12-09

    申请号：EP13873552.7

    申请日：2013-12-27

    申请人： NR Electric Co., Ltd. ,  NR Engineering Co., Ltd

    发明人： WANG, Yu ,  CAO, Dongming ,  FANG, Taixun ,  YANG, Hao ,  YANG, Bing ,  SHI, Wei ,  LU, Wei

    IPC分类号： H01H33/00

    CPC分类号： H02H3/08 ,  H01H9/542 ,  H01H9/548 ,  H01H33/596 ,  H01H71/1045 ,  H01H2009/0083 ,  H02H9/02

    摘要： An apparatus for limiting a current of a circuit or breaking a current, and a control method thereof are disclosed. The apparatus includes a current breaking branch (29) and a bridge branch. The bridge branch includes two bridge arms formed by four identical current commutation branches. Every two of the four current commutation branches are connected in series, and the formed two bridge arms are then connected in parallel. The two bridge arms are both connected in parallel to the current breaking branch, and middle points of the two bridge arms are separately connected to two ends of a circuit. Each current commutation branch includes at least one high-speed isolation switch (6) and at least one bidirectional power semiconductor switch (10) that are connected in series. The apparatus can turn off currents in two directions.

    摘要翻译： 用于限制电路的电流或切断电流的控制方法的装置，以及它们的被游离缺失光盘。 该装置包括一个电流切断分支（29）和一个桥支路。 桥支路包括由四个相同的电流换向分支形成的两个桥臂。 四个电流换向分支机构的每两个串联连接，然后形成了两个桥臂并联连接。 所述两个桥臂并联连接这两个的电流切断分支，两个桥臂的中间点分别连接到电路的两端。 每个电流换向分支包括至少一个高速隔离开关（6），并且被串联连接的至少一个双向功率半导体开关（10）。 该装置可以在两个方向关闭电流。