公开(公告)号：US20250167703A1

公开(公告)日：2025-05-22

申请号：US18685065

申请日：2021-08-23

Applicant: HITACHI MITSUBISHI HYDRO CORPORATION ,  Hitachi, Ltd. ,  HITACHI INDUSTRIAL PRODUCTS, LTD.

Inventor： Akira BANDO ,  Takahiko KIKUI ,  Kenta WATANABE ,  Yasuhiro KIYOFUJI ,  Masakazu ISHIKAWA ,  Tomomichi ITO ,  Masaya ICHINOSE ,  Jun NARUSHIMA ,  Hikaru MEGURO

IPC: H02P21/22

Abstract: There is provided an adjustable speed generator motor system with full power converter (FPC system) in which two 3-level converters are connected back-to-back on the DC side, and by providing a mode in which a fly-wheeling diode is forced to conduct a current independently for three phases according to the current polarity and a mode in which the fly-wheeling diode is forced to conduct a current independently for three phases according to magnitude relation of the absolute value of a 3-phase AC current and the current polarity of each phase the FPC system is capable of continuing stable operation.

公开(公告)号：US20230369988A1

公开(公告)日：2023-11-16

申请号：US18026111

申请日：2020-09-18

Applicant: HITACHI MITSUBISHI HYDRO CORPORATION ,  HITACHI, LTD.

Inventor： Akira BANDO ,  Takahiko KIKUI ,  Kenta WATANABE ,  Tomomichi ITO ,  Yasuhiro KIYOFUJI ,  Masakazu ISHIKAWA ,  Yosuke NAKAIDE

IPC: H02M7/483 ,  H02M1/32 ,  H02M1/00

CPC classification number: H02M7/4835 ,  H02M1/32 ,  H02M1/0048

Abstract: A modular multilevel power converter includes: a capacitor voltage adjuster that calculates an active current component command to make an average voltage of capacitors match a command value; an active power detector that receives an AC current signal and an AC voltage signal and calculates an active power; an active power adjuster that calculates a DC current command value to make the active power match a command value; a first active power command suppressor that suppresses an absolute value of an active power command value; and a second active power command suppressor that adjusts an absolute value of an active power command value.

公开(公告)号：US20140152087A1

公开(公告)日：2014-06-05

申请号：US14080919

申请日：2013-11-15

Applicant: Hitachi, Ltd.

Inventor： Yasuhiro NAKATSUKA ,  Yasuhiro IMAZU ,  Osamu SAKUCHI ,  Masaya ICHINOSE ,  Yasuhiro KIYOFUJI ,  Akira BANDO ,  Jun NARUSHIMA

IPC: B60M3/02 ,  H02J3/28

CPC classification number: B60M3/02 ,  B60M3/06 ,  H02J3/28 ,  H02J3/46

Abstract: Feeder sections to be a target of interchange are to be expanded in order to improve the effect of power interchange between feeders. A control device for railway power conditioner is connected to a first feeder connected to a load side of a transformer in a first railway substation including a transformer receiving power from a power grid, and a second feeder connected to a load side of a transformer in a second railway substation including a transformer receiving power from a power grid, and decides an amount of power interchanged between the first and second feeders. The control device decides the amount of power interchanged between the first and second feeders, using the received power in the first railway substation and power on the first feeder, and the received power in the second railway substation and power on the second feeder.

Abstract translation: 作为交换对象的进料器部分应进行扩展，以提高进料器之间电力交换的效果。 一种用于铁路功率调节器的控制装置连接到第一铁路变电站中连接到变压器的负载侧的第一馈线，该第一铁路变电站包括从电网接收电力的变压器，以及连接到变压器的负载侧的第二馈电装置 第二铁路变电站，包括从电网接收电力的变压器，并且确定在第一和第二馈电线之间互换的电力量。 控制装置使用第一铁路变电站中的接收功率和第一馈线上的功率以及第二铁路变电站中的接收功率和第二馈线上的功率来决定第一和第二馈线之间互换的功率量。

公开(公告)号：US20140211528A1

公开(公告)日：2014-07-31

申请号：US14159530

申请日：2014-01-21

Applicant: HITACHI, LTD.

Inventor： Shigenori INOUE ,  Shuji KATOH ,  Yasuhiro KIYOFUJI ,  Makoto KADOWAKI ,  Hiroyuki FUJITA ,  Hideki OGATA

IPC: H02M7/797

CPC classification number: H02M7/797 ,  H02J3/36 ,  H02M2007/4835 ,  Y02E60/60

Abstract: A power conversion apparatus including a three-phase transformer having at least four three-phase windings, and three converter arms each configured by connecting one or plural unit converters each including a switching device and an energy storage element in series. A power source or a load is connected to a first three-phase winding of the transformer, three series circuits which connects second and third three-phase windings of the transformer, and the converter arms in series with each other are connected in parallel, the parallel connection point is a DC terminal, and a magnitude relationship between a coupling coefficient of the first and second three-phase windings, and a coupling coefficient of the first three- and third three-phase windings is equal to a magnitude relationship between a coupling coefficient of the fourth and second three-phase windings, and a coupling coefficient of the fourth and the third three-phase windings.

Abstract translation: 一种电力转换装置，包括具有至少四个三相绕组的三相变压器，以及三个转换臂，其通过将包括开关装置和能量存储元件的一个或多个单元转换器串联连接而构成。 电源或负载连接到变压器的第一三相绕组，连接变压器的第二和第三三相绕组的三个串联电路和彼此串联的转换器臂并联连接， 并联连接点是DC端子，并且第一和第三三相绕组的耦合系数与第一三和三相绕组的耦合系数之间的大小关系等于耦合的大小关系 第四和第三三相绕组的系数，以及第四和第三三相绕组的耦合系数。

公开(公告)号：US20140167701A1

公开(公告)日：2014-06-19

申请号：US14096294

申请日：2013-12-04

Applicant: Hitachi, Ltd.

Inventor： Yasuhiro NAKATSUKA ,  Yasuhiro IMAZU ,  Akihiro MAOKA ,  Masaya ICHINOSE ,  Yasuhiro KIYOFUJI ,  Akira BANDO

IPC: H02J7/02

CPC classification number: H02J3/32

Abstract: The invention provides a power converter including a plurality of power conversion units each connected to a different feeder, a DC energy interchange unit connected to the power conversion units and connected to a secondary battery, and a power control unit which instructs the regeneration-side power conversion unit connected to the regeneration-side feeder of the feeders, through which a regenerative current flows, and the consumption-side power conversion unit connected to the consumption-side feeder through which a current consumption flows, to output power from the regeneration-side feeder to the consumption-side feeder through the DC energy interchange unit. The power control unit also determines the voltage of the DC energy interchange unit in such a manner as to input/output energy corresponding to the sum of regenerative power of the regeneration-side feeder and consumed power of the consumption-side feeder to and from the secondary battery.

Abstract translation: 本发明提供了一种功率转换器，包括多个电源转换单元，每个电源转换单元各自连接到不同的馈线，连接到电力转换单元并连接到二次电池的DC能量交换单元，以及指示再生侧功率的功率控制单元 与再生电流流过的馈电线的再生侧供电线连接的电力转换单元和与电流消耗流过的消耗侧馈电线连接的消耗侧电力变换单元从再生侧输出电力 通过直流能量交换单元向消耗侧进料器供料。 功率控制单元还以这样的方式确定直流能量交换单元的电压，即输入/输出对应于再生侧馈电线的再生功率和消耗侧馈电线的总和的能量 二次电池

公开(公告)号：US20140078796A1

公开(公告)日：2014-03-20

申请号：US14012456

申请日：2013-08-28

Applicant: Hitachi, Ltd.

Inventor： Shigenori INOUE ,  Shuji KATOH ,  Akira BANDO ,  Yasuhiro KIYOFUJI ,  Yoshio EGUCHI ,  Masaya ICHINOSE ,  Takayoshi YAMAMOTO

IPC: H02M7/217

CPC classification number: H02M7/2173 ,  H02M5/10 ,  H02M5/4585 ,  H02M7/483 ,  H02M7/5388 ,  H02M2007/4835

Abstract: In the present invention, provided is a power conversion apparatus in which at least one energy storage element and at least one switching element are included, a plurality of series circuits of a transformer winding and an arm in which one or a plurality of at least two-terminal unit converters which depend on ON/OFF of the switching element and supply a zero voltage or a voltage depending on a voltage of the energy storage element are connected in series are connected in parallel, and a multi-phase power source or a multi-phase load is connected to another winding of the transformer, and the parallel-connection point is set as a DC terminal, and which includes means for controlling a current flowing through each of the arms to have a phase and amplitude different from each other.

Abstract translation: 在本发明中，提供了一种功率转换装置，其中至少包括一个能量存储元件和至少一个开关元件，变压器绕组和臂的多个串联电路，其中一个或多个至少两个 依赖于开关元件的导通/截止并且提供依赖于能量存储元件的电压的零电压或电压串联连接的终端单元转换器并联连接，并且多相电源或多 相位负载连接到变压器的另一个绕组，并联连接点被设置为直流端子，并且其包括用于控制流过每个臂的电流以具有彼此不同的相位和幅度的装置。