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公开(公告)号：US11909217B2
公开(公告)日：2024-02-20
申请号：US17478561
申请日：2021-09-17
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yanzhong Zhang , Xun Wang
CPC classification number: H02J3/46 , H02J3/32 , H02J3/34 , H02J3/381 , H02J7/0016 , H02J7/0047 , H02J2300/24
Abstract: The present disclosure discloses an energy storage system. The energy storage system includes M cell strings, N energy storage converters, first ends of the N energy storage converters are coupled to at least one of the M cell strings, and second ends of the N energy storage converters are configured to connect to a power grid. A first end of a first energy storage converter is coupled to Q cell strings in the M cell strings, and the first energy storage converter includes a DC/AC conversion unit and at least one DC/DC conversion unit. A first DC/DC conversion unit is coupled to at least one of the Q cell strings by using the first end of the first energy storage converter, the first DC/DC conversion unit is coupled to the DC/AC conversion unit, and the DC/AC conversion unit is coupled to the power grid by using a second end of the first energy storage converter. The first DC/DC conversion unit is configured to perform adaptation between a voltage of the DC/AC conversion unit and a voltage of a cell string. Therefore, a cell capacity is fully used, and a waste of the cell capacity is reduced.
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公开(公告)号：US11539326B2
公开(公告)日：2022-12-27
申请号：US17359011
申请日：2021-06-25
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xun Wang , Yanzhong Zhang
Abstract: This application discloses a photovoltaic direct-current breaking apparatus, including a positive connection terminal and a negative connection terminal for connecting a photovoltaic string and a photovoltaic energy converter, a first diode, a first switch, a convector circuit, and an energy absorption circuit, where the first switch, the convector circuit, and the energy absorption circuit are connected in parallel. The convector circuit can effectively avoid arc discharge and ablation generated when the first switch cuts off a direct-current circuit between the photovoltaic string and the photovoltaic energy converter. The first diode can effectively bypass energy stored by an energy storage device in the photovoltaic energy converter, helping reduce required specifications of a semiconductor device in the convector circuit. The energy absorption circuit can also effectively reduce required specifications of the semiconductor device and a varistor.
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公开(公告)号：US11217999B2
公开(公告)日：2022-01-04
申请号：US17113453
申请日：2020-12-07
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yanzhong Zhang , Xun Wang , Roland Huempfner
IPC: H02J3/38
Abstract: Voltage in the photovoltaic power generation system can be increased under a same power conversion condition, to reduce a current in the photovoltaic power generation system, thereby reducing energy consumption and reducing costs of the photovoltaic power generation system. The system includes: a photovoltaic array, a direct current conversion unit, a bus unit, and an inverter unit, where there are one or more photovoltaic arrays; the photovoltaic array is configured to: convert solar energy into electric energy, in other words, generate direct current power, and output a direct current voltage. The bus unit stores direct current electric energy output by the direct current conversion unit or directly stores the direct current electric energy output by the photovoltaic array, to increase a bus voltage in the first bus unit.
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Patent Agency Ranking
公开(公告)号：US20210091571A1
公开(公告)日：2021-03-25
申请号：US17113453
申请日：2020-12-07
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yanzhong Zhang , Xun Wang , Roland Huempfner
IPC: H02J3/38
Abstract: Voltage in the photovoltaic power generation system can be increased under a same power conversion condition, to reduce a current in the photovoltaic power generation system, thereby reducing energy consumption and reducing costs of the photovoltaic power generation system. The system includes: a photovoltaic array, a direct current conversion unit, a bus unit, and an inverter unit, where there are one or more photovoltaic arrays; the photovoltaic array is configured to: convert solar energy into electric energy, in other words, generate direct current power, and output a direct current voltage. The bus unit stores direct current electric energy output by the direct current conversion unit or directly stores the direct current electric energy output by the photovoltaic array, to increase a bus voltage in the first bus unit.
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公开(公告)号：US20200287476A1
公开(公告)日：2020-09-10
申请号：US16881796
申请日：2020-05-22
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yongbing Gao , Yanfeng Li , Xun Wang
Abstract: A power supply system includes at least one inverter, at least one cell string, and a transformer, where an input end of the at least one inverter is connected to an output end of the at least one cell string, an output end of the at least one inverter is connected to an input end of the transformer, and an output end of the transformer is configured to output a power supply voltage. The output end of the at least one inverter is connected to an output end of an inverter unit.
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公开(公告)号：US10666162B2
公开(公告)日：2020-05-26
申请号：US16561248
申请日：2019-09-05
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yongbing Gao , Yanfeng Li , Xun Wang
Abstract: A power supply system includes at least one inverter, at least one cell string, and a transformer, where an input end of the at least one inverter is connected to an output end of the at least one cell string, an output end of the at least one inverter is connected to an input end of the transformer, and an output end of the transformer is configured to output a power supply voltage. The output end of the at least one inverter is connected to an output end of an inverter unit.
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公开(公告)号：US20190393802A1
公开(公告)日：2019-12-26
申请号：US16561248
申请日：2019-09-05
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yongbing Gao , Yanfeng Li , Xun Wang
Abstract: A power supply system includes at least one inverter, at least one cell string, and a transformer, where an input end of the at least one inverter is connected to an output end of the at least one cell string, an output end of the at least one inverter is connected to an input end of the transformer, and an output end of the transformer is configured to output a power supply voltage. The output end of the at least one inverter is connected to an output end of an inverter unit.
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公开(公告)号：US11011999B2
公开(公告)日：2021-05-18
申请号：US16881796
申请日：2020-05-22
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yongbing Gao , Yanfeng Li , Xun Wang
Abstract: A power supply system includes at least one inverter, at least one cell string, and a transformer, where an input end of the at least one inverter is connected to an output end of the at least one cell string, an output end of the at least one inverter is connected to an input end of the transformer, and an output end of the transformer is configured to output a power supply voltage. The output end of the at least one inverter is connected to an output end of an inverter unit.
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