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公开(公告)号：US20210028625A1
公开(公告)日：2021-01-28
申请号：US17040055
申请日：2019-02-27
发明人： Sadayuki INOUE , Tomihiro TAKANO
摘要： A solar cell power conversion device is disposed between a solar cell and a consumer premises distribution system. A storage battery power conversion device is disposed between a storage battery and the consumer premises distribution system. When an AC effective voltage in the consumer premises distribution system deviates from a voltage range defined in accordance with dead zone information transmitted from HEMS, system voltage stabilization control for returning the AC effective voltage to fall within the voltage range is performed by control of active power and reactive power that are output from a first DC/AC conversion circuit and a second DC/AC conversion circuit.
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公开(公告)号：US20240055975A1
公开(公告)日：2024-02-15
申请号：US18271308
申请日：2021-01-15
发明人： Sadayuki INOUE , Koki MATSUMOTO
CPC分类号： H02M1/12 , H02M1/0009 , H02M7/42 , H02J3/381 , H02J2300/22
摘要： A power conversion device equipped with virtual synchronous generator control includes a converter to convert a first DC voltage output from a distributed power source into a second DC voltage, an inverter to convert the second DC voltage output from the converter into an AC voltage and output the AC voltage to an AC system, a converter control circuit, a virtual synchronous generator control circuit to impart a transient characteristic of a synchronous generator to the inverter, and an inverter control circuit to control the inverter as a voltage source, based on AC system voltage information input from the virtual synchronous generator control circuit. The virtual synchronous generator control circuit calculates a switching frequency at which charge/discharge of the distributed power source is switched, based on information necessary for virtual synchronous generator control including a power target value of the power conversion device. The converter control circuit uses the switching frequency to create a frequency range of AC system voltage for providing a dead zone in which charge/discharge power of the distributed power source is zero in a drooping characteristic of the power conversion device, or a hysteresis in switching of charge/discharge of the distributed power source. The converter control circuit performs control such that charge/discharge power of the distributed power source becomes zero in the frequency range.
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公开(公告)号：US20200274357A1
公开(公告)日：2020-08-27
申请号：US16635629
申请日：2018-05-10
发明人： Sadayuki INOUE , Takahiro KATO
摘要： When the AC voltage effective value at an interconnection point is higher than a first threshold voltage, a solar-panel power conversion device controls an output of reactive power so that the voltage at the interconnection point matches a first target effective voltage. When the power generated from an energy creation apparatus is higher than a first reference power and the AC voltage effective value at the interconnection point is higher than a second threshold voltage, then a storage-battery power conversion device controls an output of reactive power so that the voltage at the interconnection point matches a second target effective voltage.
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公开(公告)号：US20230283076A1
公开(公告)日：2023-09-07
申请号：US18014747
申请日：2020-08-05
发明人： Sadayuki INOUE , Koki MATSUMOTO
IPC分类号： H02J3/24 , H02J3/38 , G05B19/042
CPC分类号： H02J3/24 , H02J3/381 , G05B19/042 , G05B2219/2639
摘要： An operation plan creation circuit creates a power target value of each of a plurality of distributed power supplies on the basis of information received by a communication circuit and capacities of the plurality of distributed power supplies a control parameter generation circuit generates a control parameter of the virtual synchronous generator control implemented in a static inverter of each of the distributed power supplies or information necessary for generating the control parameter. The communication circuit receives measurement information of each of the distributed power supplies, and transmits a control command to each of the distributed power supplies. The control parameter generation circuit generates the control parameter or the information necessary for generating the control parameter on the basis of the information received by the communication circuit, the capacities of the plurality of distributed power supplies, and the power target value of each of the distributed power supplies.
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公开(公告)号：US20230115683A1
公开(公告)日：2023-04-13
申请号：US17913849
申请日：2020-04-30
发明人： Sadayuki INOUE
摘要： An inverter converts power outputted from a distributed power supply into AC power, and outputs to an AC system. An inverter control circuit generates an AC voltage target value at a time of controlling the inverter, and generates a command value for control of the inverter as a voltage source. When the inverter is introduced into the AC system, the inverter control circuit sets a frequency of the AC voltage target value to a frequency of an AC voltage detected by an AC frequency detection circuit, and controls a phase of the AC voltage target value to be at least a leading phase with respect to the AC voltage of the AC system when a target value of the AC power is in a running direction.
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公开(公告)号：US20170366023A1
公开(公告)日：2017-12-21
申请号：US15543611
申请日：2015-09-29
发明人： Kazufumi TANAKA , Sadayuki INOUE , Makiko KISE
CPC分类号： H02J7/0026 , H01M10/425 , H01M10/443 , H01M10/486 , H02J3/32 , H02J3/385 , H02J7/0022 , H02J7/0083 , H02J7/0091 , H02J7/045 , H02J7/047 , H02J7/35 , H02J2003/388 , Y02E10/58
摘要： When a plurality of storage batteries is used by connecting them in parallel, since the progress of degradation differs among the storage batteries, a power conversion system includes a degradation information acquisition device for acquiring the degradation information of the storage batteries; a temperature information acquisition device for detecting the temperature information of the storage batteries, and a control device for controlling the storage battery power converter based on the degradation information of the storage batteries by the degradation information acquisition device and the temperature information of the storage batteries by the temperature information acquisition device so that the degradation states of the plurality of the storage batteries can be matched.
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公开(公告)号：US20240297505A1
公开(公告)日：2024-09-05
申请号：US18572789
申请日：2021-06-28
发明人： Koki MATSUMOTO , Sadayuki INOUE
CPC分类号： H02J3/40 , H02J3/388 , H02J2203/20
摘要： A virtual synchronous generator controller included in a controller of a power convertor generates a first command value of a frequency of a second voltage and a second command value of a phase of the second voltage by making an active power value and an active power target value correspond respectively to electrical energy and mechanical energy of a motion equation of a rotor of a synchronous generator to simulate an operation of the synchronous generator. When a turn-on condition is satisfied, a determination unit switches a connection state from a non-conduction state to a conduction state by controlling a relay that causes the connection state between an inverter and an AC power system to be selectively switched between the conduction state and the non-conduction state.
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公开(公告)号：US20240079877A1
公开(公告)日：2024-03-07
申请号：US18272351
申请日：2021-01-29
发明人： Yuki ITOGAWA , Sadayuki INOUE , Tomihiro TAKANO , Keishi MATSUDA , Xiaowei DUI
摘要： A power conversion device inputs or outputs a power for changing a state quantity of a distribution grid to which a voltage source device is connected, to or from the distribution grid. A grid control unit calculates a power command value of the power conversion device such that a drooping characteristic is provided for compensating for a deviation from a control target of the state quantity obtained from an output of a detector. A frequency characteristic of control computation for calculating a power command value from the deviation in the system control unit is defined such that a first control gain value in a first frequency range including direct current is set corresponding to a slope of the drooping characteristic, and a second control gain value in a second frequency range including higher frequencies than the first frequency range is set to be lower than the first control gain value.
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公开(公告)号：US20210234372A1
公开(公告)日：2021-07-29
申请号：US15734560
申请日：2019-03-18
发明人： Sadayuki INOUE
IPC分类号： H02J3/38 , H02J3/32 , H02J13/00 , H02J3/00 , G05B19/042
摘要： A town storage battery power conversion device outputs an AC voltage to a distribution system during a power failure. Electric power generated by a solar cell installed in each consumer house is converted into an AC voltage by a solar cell power conversion device and output to a consumer premises distribution system to which a load is connected. In an autonomous operation during a power failure, an operation plan for a distributed power supply is updated in a cycle longer than a cycle of an operation plan for a town storage battery. In the autonomous operation, the town storage battery power conversion device changes an AC voltage frequency according to a difference between electric power output from the town storage battery and the operation plan. The solar cell power conversion device has a function of modifying a control target value for the solar cell according to the AC voltage frequency.
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公开(公告)号：US20210152009A1
公开(公告)日：2021-05-20
申请号：US17047705
申请日：2019-02-22
发明人： Satoshi HARA , Tomoki TAKEGAMI , Sadayuki INOUE
摘要： A device for controlling a storage battery system is provided. The device includes: a state information calculator configured to calculate state information on each of batteries of a plurality of storage battery modules; a conversion efficiency characteristics calculator configured to calculate a power conversion efficiency of each of DC/DC converters of the plurality of storage battery modules; and a storage battery module selector configured to select one or a plurality of storage battery modules to be used while the storage battery system is charged or discharged and to determine a charge power or a discharge power of each of the selected storage battery modules, based on the state information of the batteries and the power conversion efficiencies of the DC/DC converters.
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