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公开(公告)号：US11870238B2
公开(公告)日：2024-01-09
申请号：US17535375
申请日：2021-11-24
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Xiufeng Zhang , Yanzhong Zhang
Abstract: A protection apparatus includes an interface, a protection switch, a direct current bus, and a controller. The apparatus is connected to at least two photovoltaic units via the interface, the at least two photovoltaic units are coupled to the direct current bus inside the apparatus to form at least two branches, and each branch is connected to at least one photovoltaic unit. The protection switch is configured to disconnect all or some of the photovoltaic units from the direct current bus, to enable a maximum of three photovoltaic units to be directly connected in parallel. According to the apparatus, a photovoltaic unit and a line are protected with a low power loss when a photovoltaic power generation system is faulty.
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公开(公告)号：US20240006886A1
公开(公告)日：2024-01-04
申请号：US18456205
申请日：2023-08-25
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Lin Li , Zhipeng Wu , Yanzhong Zhang
CPC classification number: H02J3/32 , H02J3/144 , H02J3/472 , H02J2203/20
Abstract: Embodiments of this application provide an energy storage system and a black start method. The energy storage system includes a black start controller, a battery module, a first converter, and a system control unit. The black start controller outputs a black start signal, the battery module generates an output voltage based on the black start signal, and the first converter supplies power to the system control unit based on the black start signal and the output voltage of the battery module, to enable the system control unit to implement black start of the energy storage system based on the black start signal.
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公开(公告)号：US11799419B2
公开(公告)日：2023-10-24
申请号：US17533614
申请日：2021-11-23
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Jianqiang Wang , Song Wan , Yanzhong Zhang , Yongbing Gao
Abstract: In a detection condition determining method, a control center obtains a working parameter value of a target photovoltaic device in a first time length closest to a current time point, where the working parameter value of the target photovoltaic device may be provided for the control center by a photovoltaic inverter coupled to the target photovoltaic device. The control center detects the target photovoltaic device in response to the control center determining, based on the working parameter value, that an environmental parameter value of the target photovoltaic device meets an environmental parameter threshold. Using the method helps reduce operation and maintenance costs of a photovoltaic power station.
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24.发明授权公开(公告)号：US11784494B2
公开(公告)日：2023-10-10
申请号：US17709059
申请日：2022-03-30
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Xiufeng Zhang , Yanzhong Zhang
IPC: H02J3/38
CPC classification number: H02J3/381 , H02J2300/24
Abstract: A direct current power supply system includes N power supply devices, N triple-pole direct current switches, a positive bus, an M bus, and a negative bus. A positive input terminal of an ith triple-pole direct current switch is coupled to a first output terminal of an ith power supply device, an M input terminal of the ith triple-pole direct current switch is coupled to a second output terminal of the ith power supply device, a negative input terminal of the ith triple-pole direct current switch is coupled to a third output terminal of the ith power supply device, a positive output terminal of the ith triple-pole direct current switch is coupled to the positive bus, an M input terminal of the ith triple-pole direct current switch is coupled to the M bus, and a negative output terminal of the ith triple-pole direct current switch is coupled to the negative bus.
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公开(公告)号：US20230260097A1
公开(公告)日：2023-08-17
申请号：US18305171
申请日：2023-04-21
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Jianqiang Wang , Zhenhuan Shu , Song Wan , Yanzhong Zhang
CPC classification number: G06T7/0002 , G01J5/0859 , B64U10/00 , G01J2005/0077
Abstract: A power station inspection system and a power station inspection method are disclosed. A power station inspection system includes an unmanned aerial vehicle, and an unmanned aerial vehicle flight controller, a central controller, and at least two types of data collection terminals that are disposed on the unmanned aerial vehicle. The central controller is configured to control the unmanned aerial vehicle flight controller, so that the unmanned aerial vehicle flight controller controls flight of the unmanned aerial vehicle. The central controller is further configured to control the at least two types of data collection terminals to collect at least two types of component image data of a power station component in a flight process of the unmanned aerial vehicle.
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Patent Agency Ranking
公开(公告)号：US20230208354A1
公开(公告)日：2023-06-29
申请号：US18173762
申请日：2023-02-23
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Chen Wang , Yanzhong Zhang
Abstract: A combiner box includes a switching device, a sampling circuit, and a controller. The switching device is connected in parallel between a positive input port and a negative input port. The sampling circuit is configured to collect at least one of an input parameter and an output parameter of the combiner box. The controller is configured to control the switching device to be closed when determining, based on the at least one parameter, that a short circuit occurs between a positive output cable and a negative output cable or a positive output cable and a negative output cable are reversely connected, so that the switching device, the positive input port, and the negative input port form a closed loop.
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公开(公告)号：US12301030B2
公开(公告)日：2025-05-13
申请号：US17708506
申请日：2022-03-30
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Jianshan Li , Yanzhong Zhang , He Zhou , Zhipeng Wu
IPC: H02J7/00
Abstract: An energy storage system, to improve operating efficiency and system reliability that exist when a component in the energy storage system is faulty, and avoid a waste of resources. The energy storage system includes a plurality of energy storage branches, at least one switch unit, and a control circuit. Each of the energy storage branches includes a first bus, a string-level converter, and a battery string that are sequentially connected in series, a plurality of balancing converters, and a shared bus. The battery string includes a plurality of battery units connected in series, and each of the battery units includes one battery pack. The battery pack is connected to an input side of one corresponding balancing converter, and output sides of the plurality of balancing converters are separately connected to the shared bus.
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公开(公告)号：US12273048B2
公开(公告)日：2025-04-08
申请号：US17854424
申请日：2022-06-30
Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Inventor： Dong Chen , Yanzhong Zhang , Lei Shi
IPC: H02M7/538 , H02M1/00 , H02M1/08 , H02M7/483 , H02M7/5387
Abstract: Embodiments of this application disclose an inverter apparatus and an inverter apparatus control method. The inverter apparatus includes an inverter circuit and a control unit, and the control unit detects a driving mode of the inverter circuit based on a running state of the inverter circuit. When the inverter circuit outputs reactive power and an output current amplitude is greater than a current threshold, the control unit controls the inverter circuit in a full-bridge two-level bipolar control mode; and in other cases, the control unit controls the inverter circuit in a three-level control mode. This reduces a risk of breaking down horizontal bridge semiconductor switching devices by a voltage spike in an active turn-off process.
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公开(公告)号：US12261566B2
公开(公告)日：2025-03-25
申请号：US17575537
申请日：2022-01-13
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yanzhong Zhang , Zhenhuan Shu
Abstract: A photovoltaic system includes a plurality of photovoltaic strings, at least one junction device, and at least one inverter. Each photovoltaic string includes a first direct current output terminal, and is configured to generate a first direct current. Each junction device is coupled to the plurality of photovoltaic strings. Each junction device is configured to output second direct currents through second direct current output terminals of the junction device after converging a plurality of first direct currents. An ith junction device includes a plurality of second direct current output terminals. The ith junction device is configured to output a plurality of mutually independent second direct currents after converging a plurality of first direct currents, and i is a positive integer. A quantity of the plurality of second direct currents is less than a quantity of the plurality of first direct currents.
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30.发明授权公开(公告)号：US12222397B2
公开(公告)日：2025-02-11
申请号：US17447991
申请日：2021-09-17
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yanzhong Zhang , Yuandong Meng , Baiyu Chen
IPC: G01R31/382 , H02H7/18
Abstract: Embodiments of this application disclose an arc detection method for performing protection in an energy storage system, and a related apparatus, to improve accuracy of arc detection in an energy storage system, promptly take an arc extinguishing measure, and reduce a probability of causing a safety hazard. The method in the embodiments of this application includes: A control apparatus obtains an electrical signal at an electrical connection point in an energy storage system. The control apparatus determines a frequency domain amplitude based on a frequency domain characteristic of the electrical signal. When the frequency domain amplitude is greater than a preset amplitude, the control apparatus controls the energy storage system to perform an arc extinguishing and protection operation on the electrical connection point.
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