Patents by Inventor Tetsu Shijo
Tetsu Shijo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240092213Abstract: According to one embodiment, a charge/discharge system includes a storage battery and a control device. The storage battery is configured to absorb CO2 during charging and release CO2 during discharging. The control device is configured to control a charge/discharge operation of the storage battery. The control device is configured to calculate a power trading price. The control device is configured to calculate a power trading price. The control device is configured to control the charge/discharge operation of the storage battery to perform charging and discharging when the power trading price during charging is lower than the power trading price during discharging.Type: ApplicationFiled: March 8, 2023Publication date: March 21, 2024Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Masaaki ISHIDA, Tetsu SHIJO, Kenichirou OGAWA
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Publication number: 20240092181Abstract: According to one embodiment, a solar cell system includes a first solar cell, a first electric circuit and controller. The first solar cell is provided on a hood of a vehicle. The first electric circuit is connected to the first solar cell. The controller is configured to electrically connect the first solar cell with the first electric circuit in a case where a traveling speed of the vehicle is less than a first threshold, and electrically disconnect the first solar cell from the first electric circuit in a case where the traveling speed of the vehicle is equal to or greater than the first threshold.Type: ApplicationFiled: March 10, 2023Publication date: March 21, 2024Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kenichirou OGAWA, Tetsu SHIJO, Yasuhiro KANEKIYO
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Publication number: 20240097472Abstract: 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.Type: ApplicationFiled: March 14, 2023Publication date: March 21, 2024Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yasuhiro KANEKIYO, Kenichirou OGAWA, Tetsu SHIJO
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Patent number: 11901807Abstract: 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.Type: GrantFiled: February 28, 2022Date of Patent: February 13, 2024Assignee: Kabushiki Kaisha ToshibaInventors: Yasuhiro Kanekiyo, Qiang Lin, Hiroshi Uno, Tetsu Shijo
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Publication number: 20240039285Abstract: 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.Type: ApplicationFiled: February 28, 2023Publication date: February 1, 2024Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Qiang LIN, Tetsu SHIJO, Kenichirou OGAWA, Yasuhiro KANEKIYO
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Patent number: 11888341Abstract: 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.Type: GrantFiled: March 9, 2022Date of Patent: January 30, 2024Assignee: Kabushiki Kaisha ToshibaInventors: Hiroshi Uno, Qiang Lin, Tetsu Shijo, Yasuhiro Kanekiyo
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Publication number: 20240014654Abstract: According to one embodiment, a power distribution system includes switchgear units. The switchgear units are interposed between a feeder and power distribution areas. Each of the switchgear unit cuts off a power supply path when a frequency of power on the feeder falls below the allowable frequency in a case where the allowable frequency has been set, cuts off the power supply path when a frequency change rate of power on the feeder exceeds the allowable frequency change rate in a case where the allowable frequency change rate has been set, and cuts off the power supply path when an elapsed time since a state in which the power supply path between the feeder and the power distribution area is to be cut off is formed exceeds the allowable response time in a case where the allowable response time has been set.Type: ApplicationFiled: March 16, 2023Publication date: January 11, 2024Applicant: KABUSHIKI KAISHA TOSHIBAInventor: Tetsu SHIJO
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Patent number: 11867737Abstract: According to one embodiment, a detection apparatus includes a pair of conductors configured to detect an electromagnetic wave occurring due to a discharge phenomenon in a target apparatus, wherein the pair of conductors are arranged in a near field region of the target apparatus in which the electromagnetic wave occurs.Type: GrantFiled: February 28, 2022Date of Patent: January 9, 2024Assignee: Kabushiki Kaisha ToshibaInventors: Kazuhiro Inoue, Tetsu Shijo, Yasuhiro Kanekiyo
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Patent number: 11821931Abstract: According to one embodiment, a detection apparatus includes a pair of conductors configured to detect an electromagnetic wave occurring due to a discharge phenomenon in a target apparatus, wherein the pair of conductors are arranged in a near field region of the target apparatus in which the electromagnetic wave occurs.Type: GrantFiled: February 28, 2022Date of Patent: November 21, 2023Assignee: Kabushiki Kaisha ToshibaInventors: Kazuhiro Inoue, Tetsu Shijo, Yasuhiro Kanekiyo
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Publication number: 20230302924Abstract: 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.Type: ApplicationFiled: August 19, 2022Publication date: September 28, 2023Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kenichirou OGAWA, Tetsu SHIJO, Qiang LIN, Yasuhiro KANEKIYO
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Publication number: 20230299591Abstract: 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.Type: ApplicationFiled: August 31, 2022Publication date: September 21, 2023Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu SHIJO, Qiang LIN, Kenichirou OGAWA, Yasuhiro KANEKIYO
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Patent number: 11616363Abstract: According to one embodiment, an electronic apparatus connectable to a partial power system which is a part of a power system and comprises a first power source apparatus, power supply of the first power source apparatus stopped in response to detecting an islanding of the partial power system, includes: controlling circuitry configured to output to the partial power system a first signal to disable detecting the islanding of the partial power system by the first power source apparatus during at least part of a period during which the partial power system is electrically separated from the power system.Type: GrantFiled: February 26, 2021Date of Patent: March 28, 2023Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu Shijo, Hiroshi Uno
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Publication number: 20230081126Abstract: 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.Type: ApplicationFiled: February 28, 2022Publication date: March 16, 2023Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yasuhiro KANEKIYO, Qiang LIN, Hiroshi UNO, Tetsu SHIJO
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Publication number: 20230079040Abstract: An inverter of an embodiment includes a power convertor that can perform at least one of a first action of generating electricity to be output to a power system based on a pseudo inertia and a second action of generating electricity to be output to the power system without based on the pseudo inertia, and a transmitter that transmits, to a high-order control system, first information indicating which of the first action and the second action the power converter is performing.Type: ApplicationFiled: February 28, 2022Publication date: March 16, 2023Applicant: KABUSHIKI KAISHA TOSHIBAInventor: Tetsu SHIJO
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Publication number: 20230076743Abstract: According to one embodiment, a detection apparatus includes a pair of conductors configured to detect an electromagnetic wave occurring due to a discharge phenomenon in a target apparatus, wherein the pair of conductors are arranged in a near field region of the target apparatus in which the electromagnetic wave occurs.Type: ApplicationFiled: February 28, 2022Publication date: March 9, 2023Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kazuhiro INOUE, Tetsu SHIJO, Yasuhiro KANEKIYO
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Patent number: 11539215Abstract: 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.Type: GrantFiled: September 6, 2021Date of Patent: December 27, 2022Assignee: Kabushiki Kaisha ToshibaInventors: Qiang Lin, Hiroshi Uno, Yasuhiro Kanekiyo, Tetsu Shijo
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Patent number: 11539216Abstract: 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.Type: GrantFiled: September 8, 2021Date of Patent: December 27, 2022Assignee: Kabushiki Kaisha ToshibaInventors: Tetsu Shijo, Qiang Lin, Hiroshi Uno, Yasuhiro Kanekiyo
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Publication number: 20220360099Abstract: 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.Type: ApplicationFiled: March 9, 2022Publication date: November 10, 2022Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Hiroshi UNO, Qiang LIN, Tetsu SHIJO, Yasuhiro KANEKIYO
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Publication number: 20220302707Abstract: 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.Type: ApplicationFiled: September 6, 2021Publication date: September 22, 2022Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Qiang LIN, Hiroshi UNO, Yasuhiro KANEKIYO, Tetsu SHIJO
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Publication number: 20220294225Abstract: 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.Type: ApplicationFiled: September 8, 2021Publication date: September 15, 2022Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tetsu SHIJO, Qiang LIN, Hiroshi UNO, Yasuhiro KANEKIYO