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    VARIABLE-SPEED POWER GENERATION ELECTRIC DEVICE
    2.
    发明公开
    VARIABLE-SPEED POWER GENERATION ELECTRIC DEVICE 审中-公开

    公开(公告)号：EP3806318A1

    公开(公告)日：2021-04-14

    申请号：EP19814983.3

    申请日：2019-06-06

    申请人： Hitachi Mitsubishi Hydro Corporation ,  Hitachi, Ltd.

    发明人： BANDO, Akira ,  OYAKE, Takashi ,  ICHINOSE, Masaya

    IPC分类号： H02P9/10 ,  H02M7/483

    摘要： In a variable speed generator/motor device including a variable frequency power converter, a direct current voltage device including a voltage type self-excited converter, an automatic voltage adjuster, and a converter current adjuster that controls unit converters, a first three-phase branch circuit is provided between the direct current voltage device and an alternating current system; a second three-phase branch circuit is provided between the variable frequency power converter and a three-phase alternating current synchronous machine; a first load switch is provided between the first three-phase branch circuit and the second three-phase branch circuit; a measurement current transformer is provided between the three-phase alternating current synchronous machine and the second three-phase branch circuit; when switching from a converter mode in which the variable frequency power converter drives the three-phase alternating current synchronous machine to generate power to a bypass mode, the first load switch is closed to stop a gate command to the unit converters; and when switching from the bypass mode to the converter mode, a current command value of the converter current adjuster is calculated from a current value of the measurement current transformer, the gate command to the unit converters is started, and the first load switch is opened.

    VARIABLE-SPEED GENERATOR-MOTOR DEVICE
    4.
    发明公开
    VARIABLE-SPEED GENERATOR-MOTOR DEVICE 审中-公开

    公开(公告)号：EP3823158A1

    公开(公告)日：2021-05-19

    申请号：EP19834005.1

    申请日：2019-07-01

    申请人： Hitachi Mitsubishi Hydro Corporation ,  Hitachi, Ltd.

    发明人： BANDO, Akira ,  OYAKE, Takashi ,  ICHINOSE, Masaya

    IPC分类号： H02P9/04 ,  H02M7/12 ,  H02M7/493 ,  H02M7/497 ,  H02P9/00

    摘要： In a variable speed generator/motor device including a variable frequency power converter, a direct current voltage device including a voltage type self-excited converter, an automatic voltage adjuster, and a converter current adjuster that controls unit converters, a first three-phase branch circuit is provided between the direct current voltage device and an alternating current system; a second three-phase branch circuit is provided between the variable frequency power converter and a three-phase squirrel-cage induction machine; a first load switch is provided between the first three-phase branch circuit and the second three-phase branch circuit; a measurement current transformer is provided between the three-phase squirrel-cage induction machine and the second three-phase branch circuit; when switching from a converter mode in which the variable frequency power converter drives the three-phase squirrel-cage induction machine to generate power to a bypass mode, the first load switch is closed to stop a gate command to the unit converters; and when switching from the bypass mode to the converter mode, a current command value of the converter current adjuster is calculated from a current value of the measurement current transformer, the gate command to the unit converters is started, and the first load switch is opened.

    WIND POWER GENERATING SYSTEM
    5.
    发明公开
    WIND POWER GENERATING SYSTEM 审中-公开
    系统ZUR ERZEUGUNG VON WINDENERGIE

    公开(公告)号：EP2806159A1

    公开(公告)日：2014-11-26

    申请号：EP12866000.8

    申请日：2012-01-18

    申请人： Hitachi, Ltd.

    发明人： IMAIE, Kazuhiro ,  ICHINOSE, Masaya

    IPC分类号： F03D9/00 ,  F03D7/04

    CPC分类号： H02P9/006 ,  F03D9/25 ,  F05B2220/7068 ,  F05B2260/76 ,  H02J3/386 ,  H02P9/102 ,  H02P9/105 ,  Y02E10/725 ,  Y02E10/763

    摘要： An object of the present invention is to provide a Wind Turbine Generation System that eliminates the necessity of switching to a circuit different from the one used during a normal power generation operation even when Power grid voltage sags. To accomplish the above object, the Wind Turbine Generation System according to the present invention includes a wind turbine having blades rotating upon receipt of wind, a rotor connected to the blades, and a permanent magnet generator connected to the rotor, the permanent magnet generator generating electric power by rotating a rotator having a permanent magnet in accordance with the rotation of the rotor; auxiliary machinery and a wind turbine controller that control the wind turbine; a power converter that adjusts the electric power generated by the permanent magnet and supplies the adjusted electric power to the auxiliary machinery and to the wind turbine controller; a DC converter that is connected to the permanent magnet generator to convert AC power to DC power; and a control device that is connected to the DC converter to control the power converter by using the DC power obtained from conversion.

    摘要翻译： 本发明的目的是提供一种风力发电系统，即使在电网电压骤降时也不需要切换到与正常发电动作中使用的电路不同的电路。 为了实现上述目的，根据本发明的风力发电系统包括风力涡轮机，其具有接收风的叶片旋转，连接到叶片的转子和连接到转子的永久磁铁发电机，所述永磁发电机产生 根据转子的旋转旋转具有永磁体的旋转体的电力; 辅助机械和控制风力发电机组的风力发电机组控制器; 功率转换器，其调整由所述永久磁铁产生的电力并将调整后的电力供给到所述辅助机械和所述风力涡轮机控制器; DC转换器，其连接到所述永磁发电机，以将AC电力转换为DC电力; 以及控制装置，其连接到DC转换器，以通过使用从转换获得的DC电力来控制功率转换器。