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公开(公告)号：US20220302707A1
公开(公告)日：2022-09-22
申请号：US17467407
申请日：2021-09-06
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Qiang LIN , Hiroshi UNO , Yasuhiro KANEKIYO , Tetsu SHIJO
Abstract: According to one embodiment, a voltage control inverter interconnectable with an electric power system, includes: a voltage detecting circuit configured to detect a first voltage that is a voltage of the electric power system; and a voltage output circuit configured to output a second voltage to the electric power system at a timing depending on a value of the first voltage, the second voltage having a value depending on the value of the first voltage.
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公开(公告)号：US20230299591A1
公开(公告)日：2023-09-21
申请号：US17823743
申请日：2022-08-31
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Tetsu SHIJO , Qiang LIN , Kenichirou OGAWA , Yasuhiro KANEKIYO
Abstract: A power conditioning system includes a control circuit. The control circuit is configured to switch a output control mode to any one of a first mode in which an operation not based on inertia is executed and a second mode in which an operation based on inertia is executed, performs output control according to a first rating in the first mode, and performs output control according to a second rating different from the first rating in the second mode.
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公开(公告)号：US20240097472A1
公开(公告)日：2024-03-21
申请号：US18183351
申请日：2023-03-14
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Yasuhiro KANEKIYO , Kenichirou OGAWA , Tetsu SHIJO
CPC classification number: H02J7/00712 , H02J7/0048 , H02J7/0063 , H02J7/34 , H02J2207/20
Abstract: According to one embodiment, a power supply/demand device includes a virtual synchronous inverter and a storage battery. The virtual synchronous inverter is connected to a power system. Charging and discharging of the storage battery are controlled by the virtual synchronous inverter. The virtual synchronous inverter is connected to the power system in parallel with other inverters. The virtual synchronous inverter is capable of calculating a first standby time having any length and performing control of the storage battery corresponding to an operation instruction after a lapse of the first standby time, when receiving the operation instruction accompanied by output of power to the power system or input of power from the power system.
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公开(公告)号：US20240039285A1
公开(公告)日：2024-02-01
申请号：US18175564
申请日：2023-02-28
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Qiang LIN , Tetsu SHIJO , Kenichirou OGAWA , Yasuhiro KANEKIYO
Abstract: According to one embodiment, a power supply device connected to a power grid is provided. The power supply device includes an inverter, a control unit configured to control operation of the inverter using a first parameter value so as to simulate characteristics of a synchronous generator, and an acquisition unit configured to obtain a second parameter value different from the first parameter value. The control unit is configured to control the operation of the inverter by changing the first parameter value to the acquired second parameter value.
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公开(公告)号：US20220360099A1
公开(公告)日：2022-11-10
申请号：US17690697
申请日：2022-03-09
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Hiroshi UNO , Qiang LIN , Tetsu SHIJO , Yasuhiro KANEKIYO
Abstract: A control apparatus controlling a power output apparatus that generates, based on input power from one of an electrical grid and a power storage, output power to another of the electrical grid and the power storage is provided. The control apparatus includes: a communicator to receive a grid frequency of the electrical grid and a state of charge of the power storage, or information allowing the grid frequency and the state of charge to be calculated; and a processor to determine an output destination and an output rate of the output power, based on a function of calculating the output destination and the output rate according to the grid frequency. The output destination and the output rate are adjusted according to the state of charge, by the processor changing, according to the state of charge, the function used to determine the output destination and the output rate.
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Patent Agency Ranking
公开(公告)号：US20210036625A1
公开(公告)日：2021-02-04
申请号：US16944827
申请日：2020-07-31
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Jun-ichi ITOH , Keisuke KUSAKA , Shunsuke TAKUMA , Koki YAMANOKUCHI , Shuichi OBAYASHI , Yasuhiro KANEKIYO
Abstract: An electronic circuit to receive input AC signals having different phases, and to control bidirectional switches corresponding to phases to generate, based on input AC signals having the phases, output AC signals having the phases and having a frequency different from a frequency of the input AC signals, the electronic circuit has reference signal circuitry to generate a reference signal having a frequency higher than the frequency of the output AC signals, and a commutation circuitry to control switching between voltage commutation and current commutation, wherein, in the voltage commutation, the commutation circuitry switches the bidirectional switches corresponding to the phases in sequence based on a voltage level of the output AC signals of the phases before and after a time point when an amplitude of the reference signal becomes a specific amplitude value, and in the current commutation, the commutation circuitry switches the bidirectional switches in parallel.
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公开(公告)号：US20230302924A1
公开(公告)日：2023-09-28
申请号：US17891975
申请日：2022-08-19
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Kenichirou OGAWA , Tetsu SHIJO , Qiang LIN , Yasuhiro KANEKIYO
Abstract: According to one embodiment, a charging system charges a secondary battery provided in a mobile body. The charging system includes a controller which selects one of a first charge mode which charges the secondary battery by simulating a synchronous generator and a second charge mode which charges the secondary battery without simulating the synchronous generator, and a charger which charges the secondary battery by an operation corresponding to the first charge mode or the second charge mode selected by the controller.
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公开(公告)号：US20230296675A1
公开(公告)日：2023-09-21
申请号：US17931171
申请日：2022-09-12
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Yasuhiro KANEKIYO
IPC: G01R31/34 , G01R19/165
CPC classification number: G01R31/343 , G01R19/165
Abstract: A spark discharge detection device includes a discharge detector, a waveform extension circuit, and determination circuit. The discharge detector includes a metal electrode that detects discharge between an electrode and a sliding body that is in contact with and sliding surface of the electrode. The waveform extension circuit configured to extend a discharge waveform output from the discharge detector in a time direction. The determination circuit configured to determine that discharge has occurred in the sliding body when a signal value exceeds a first threshold and a time during which the signal value exceeds the first threshold is held for a time longer than a first time for the output of the waveform extension circuit.
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公开(公告)号：US20230081126A1
公开(公告)日：2023-03-16
申请号：US17682935
申请日：2022-02-28
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Yasuhiro KANEKIYO , Qiang LIN , Hiroshi UNO , Tetsu SHIJO
Abstract: A bypass circuit of an embodiment includes a switch that shorts-circuit between a first power conversion apparatus and a power storage apparatus. The switch is connected in parallel to a second power conversion apparatus. The first power conversion apparatus converts power generated from natural energy and outputs the converted power to a power distribution grid. The second power conversion apparatus converts surplus power that has not been converted by the first power conversion apparatus and charges the power storage apparatus with the converted power; or converts power discharged from the power storage apparatus and supplies the converted power to the first power conversion apparatus.
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10.发明申请公开(公告)号：US20220294225A1
公开(公告)日：2022-09-15
申请号：US17469867
申请日：2021-09-08
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Tetsu SHIJO , Qiang LIN , Hiroshi UNO , Yasuhiro KANEKIYO
Abstract: According to one embodiment, a voltage control inverter interconnectable with a power system, includes receiving circuitry configured to receive a first control command for outputting a voltage to the power system; and controlling circuitry configured to execute the first control command to output the voltage to the power system. The controlling circuitry is configured to skip to execute the first control command in response to the first control command being received during a period in which the power system is in a first state that is different from a normal state.
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