公开(公告)号：US20220294214A1

公开(公告)日：2022-09-15

申请号：US17804703

申请日：2022-05-31

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Masahiro RIKISO ,  Sumio KACHI ,  Hideto NAKAMURA ,  Kengo NAKAO

IPC: H02J1/10 ,  H02J7/34 ,  H02J7/00

Abstract: An electric power network includes: a plurality of power routers each including a plurality of power ports; a plurality of interconnection lines configured to connect the power routers in a grid manner via the power ports; and an electric power apparatus configured to consume or supply electric power, the electric power apparatus being connected to a power port that is included in at least one of the power routers and that is not connected to any of the interconnection lines. At least one of the power ports of each of the power routers is set as a dependent port for which characteristics of direct-current power to be input or output are not controlled.

公开(公告)号：US20230114812A1

公开(公告)日：2023-04-13

申请号：US18065009

申请日：2022-12-13

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Masahiro RIKISO ,  Asuka ABE

IPC: B60L53/22 ,  B60L53/62 ,  B60L53/63

Abstract: An electric power converter for being electrically connected to a commercial power system of alternating current type and electrically connected to a device configured to input and/or output electric power. The converter includes a control unit configured to perform primary control of the device based on a reference function which has drooping characteristic for generating target value when local-control of the device is implemented according to voltage measured by the electric power converter. The electric power converter is further controlled according to secondary control in which the reference function having the drooping characteristic is updated according to electric power status of an electric power system in which the electric power converter is installed, and control cycle of the primary control is different from control cycle of the secondary control.

公开(公告)号：US20230327434A1

公开(公告)日：2023-10-12

申请号：US18328863

申请日：2023-06-05

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Asuka ABE ,  Masahiro RIKISO

IPC: H02J1/10 ,  H02J3/38

CPC classification number: H02J1/102 ,  H02J3/381

Abstract: A power converter includes: a power converting unit configured to convert input power and output the converted power; and a control unit configured to control a power conversion characteristic of the power converting unit based on a reference function having a droop characteristic that is defined according to an input value, according to the input value in any one of voltage control, power control, and current control corresponding to the droop characteristic. The reference function is constituted of a plurality of droop functions having droop characteristics different from one another connected at a connection point. A control area to define a range of voltage, power, and current in which corresponding voltage control, power control, or current control is performed is acquired for each of the droop functions.

公开(公告)号：US20230125967A1

公开(公告)日：2023-04-27

申请号：US18069761

申请日：2022-12-21

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Masahiro RIKISO ,  Asuka ABE

IPC: H02M1/00 ,  H02J3/32 ,  H02J7/00 ,  H02J1/08

Abstract: An electric power converter is electrically connected to an electric storage device. The electric power converter is configured to refer to, according to voltage measured by the electric power converter, a reference function as output target for the electric storage device, the reference function having drooping characteristic and representing a control target function. The reference function has a constant-input-output region over a predetermined voltage range. The reference function is updated based on battery status of the electric storage device.

公开(公告)号：US20230275427A1

公开(公告)日：2023-08-31

申请号：US18311970

申请日：2023-05-04

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Masahiro RIKISO ,  Asuka ABE

IPC: H02J1/10 ,  H02M1/00

CPC classification number: H02J1/102 ,  H02M1/0067 ,  H02J1/106

Abstract: A power system includes: power converters, each including a power conversion unit configured to convert an input power, and output the converted power, a controller configured to execute a primary control for controlling the output by controlling the power conversion unit based on: a reference function having a drooping characteristic defined according to an input value and a voltage of the bus or a power of the power converter to which the power conversion unit is connected, and an update unit configured to update a control method on the output; a central control device configured to execute a secondary control of controlling the power converter; the bus connected to the power conversion unit; and a power element connected to the power converter and configured to supply, consume and charge power. The central control device performs the secondary control on the power converter according to an update instruction to update the control method.

公开(公告)号：US20230231462A1

公开(公告)日：2023-07-20

申请号：US18181617

申请日：2023-03-10

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Asuka ABE ,  Masahiro RIKISO

IPC: H02M1/00 ,  H02J1/00

CPC classification number: H02M1/0003 ,  H02J1/00

Abstract: An electric power converter includes: an electric power conversion unit configured to convert electric power that has been input, and output the converted electric power; and a control unit configured to control, based on a reference function, an electric power conversion characteristic of the electric power conversion unit, wherein the reference function includes plural droop functions that have been defined according to input values, have drooping characteristics different from one another, and have been connected to each other, and the control unit is configured to control the electric power conversion characteristic by control schemes that are different from one another and are according to the drooping characteristics of the droop functions.

公开(公告)号：US20230155380A1

公开(公告)日：2023-05-18

申请号：US18157332

申请日：2023-01-20

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Masahiro RIKISO ,  Asuka ABE

IPC: H02J3/00 ,  H02J3/38 ,  H02J3/12 ,  B60L50/60 ,  B60L53/20

CPC classification number: H02J3/00125 ,  H02J3/381 ,  H02J3/12 ,  B60L50/60 ,  B60L53/20 ,  H02J2300/30 ,  H02J2300/24 ,  H02J2207/20 ,  B60L2210/30 ,  B60L2210/10

Abstract: A power converter includes: an input unit configured to be electrically connected to a device; a voltage charge unit configured to change voltage; a voltage adjustment unit configured to adjust the voltage supplied to a transmission line; a target setting unit configured to set a first target value of the voltage change unit; a voltage monitoring unit configured to observe the voltage of the transmission line; and a threshold determination mechanism configured to calculate a second target value of the voltage adjustment unit in accordance with voltage of the transmission line. The target setting unit of the power converter is configured to generate the first target value as an output target of the voltage charge unit in accordance with the voltage observed by the voltage monitoring unit. The first target value has characteristics to change a threshold voltage for controlling output of the voltage adjustment unit depending on time.

公开(公告)号：US20190036807A1

公开(公告)日：2019-01-31

申请号：US16144945

申请日：2018-09-27

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Masahiro RIKISO ,  Atsushi KUMAGAI ,  Yuto TSUJI ,  Masayuki MIURA

IPC: H04L12/751 ,  H04W40/24 ,  H04W40/26

Abstract: [OBJECT] To provide a network system which makes it possible to reduce the occurrence of a delay in data packet transfer processing even if periodic processing occurs.[ORGANIZATION] In a network system having a plurality of communication devices 10-1 to 10-5, the communication devices each include: an executing means (control part 12) that executes periodic processing whose processing occurs periodically; and an adjusting means (control part 12) that adjusts an execution timing at which the periodic processing is executed by the executing means, according to states of the other communication devices.

公开(公告)号：US20190007299A1

公开(公告)日：2019-01-03

申请号：US16124134

申请日：2018-09-06

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Masahiro RIKISO ,  Masayuki MIURA

IPC: H04L12/721 ,  H04L12/861 ,  H04L12/66

Abstract: A buffer capacity of a memory is reduced and the occurrence of useless communication is prevented. A network system can include a communication device as a transmission source, a communication device as a transmission destination, and an intermediate communication device disposed between the transmission-source communication device and the transmission-destination communication device, the intermediate communication device having a function of connecting sub-networks which construct communication routes based on route construction protocols independent of each other, the network system characterized in that the intermediate communication device includes: a route establishing means (control part) that establishes a route to the transmission-destination communication device when a packet addressed to the transmission-destination communication device is received from the transmission-source communication device; and a proxy reply means (control part) that replies as a proxy for the transmission-destination communication device to the transmission-source communication device when the route is established by the route establishing means.