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公开(公告)号：US11342757B2
公开(公告)日：2022-05-24
申请号：US17479820
申请日：2021-09-20
Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Abstract: An islanding detection method and apparatus, and a computer-readable storage medium. The detection method includes: determining a harmonic amplitude growth rate and a frequency growth rate of alternating current electricity output by an alternating current port of a grid-tied inverter; determining an islanding disturbance coefficient corresponding to the harmonic amplitude growth rate, where the harmonic amplitude growth rate and the islanding disturbance coefficient are in a monotonically increasing relationship; determining an islanding injection amount based on the frequency growth rate and the islanding disturbance coefficient corresponding to the harmonic amplitude growth rate; controlling, based on the islanding injection amount, the grid-tied inverter to output a reactive power or a reactive current over the alternating current port; and performing islanding detection based on a frequency of the alternating current electricity output by the alternating current port. With this detection method, whether islanding occurs can be accurately detected. When islanding does not occur, disturbance to a power grid is reduced, and grid connection stability is improved. When islanding occurs, it can be quickly detected, and a detection time is relatively short.
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公开(公告)号：US20220123598A1
公开(公告)日：2022-04-21
申请号：US17566058
申请日：2021-12-30
Applicant: Huawei Digital Power Technologies Co., LTD.
Inventor： Baoshan Wu , Donghao Wu
Abstract: This application discloses a wireless charging apparatus, a position detection method, and a system. The apparatus includes a transceiver end (100), and the transceiver end (100) includes a resonant network and a power conversion circuit. The apparatus further includes a controller (200), which is configured to determine a relative position between a transmit end (101) and a receive end (102) based on a self-inductance of a transmitting coil and at least one parameter, where the at least one parameter includes at least one of a coupling coefficient between the transmitting coil and a receiving coil and a coil mutual inductance between the transmitting coil and the receiving coil. The relative position between the transmit end (101) and the receive end (102) of wireless charging can be accurately detected by using the self-inductance of the transmitting coil and at least one of the coupling coefficient and the coil mutual inductance.
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公开(公告)号：US20220115956A1
公开(公告)日：2022-04-14
申请号：US17556223
申请日：2021-12-20
Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Inventor： Yunliang TENG , Chen WANG , Jincheng SHAO
Abstract: A flyback converter and an electronic device are provided. A second end of a first secondary winding in a first secondary winding module of the flyback converter is coupled to a first electrode of a first output capacitor and a first output terminal, a first end is coupled to a cathode of a first diode, and an anode of the first diode is coupled to a second electrode of the first output capacitor. A first electrode of a second output capacitor in a second secondary winding module is coupled to the second electrode of the first output capacitor, a second electrode is coupled to a second output terminal, an anode of a second diode is coupled to a second end of the second secondary winding, a cathode is coupled to the first electrode of the second output capacitor.
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公开(公告)号：US20220109373A1
公开(公告)日：2022-04-07
申请号：US17643471
申请日：2021-12-09
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Dianbo Fu , Heping Dai , Liming Ye
Abstract: A bidirectional power conversion system includes an isolated power converter having a first input connected to an output of a diode rectifier and a second input connected to an output of a power factor correction device. The power conversion system further comprises a plurality of switches and a plurality of diodes configured such that the plurality of switches and the plurality of diodes form the diode rectifier and the power factor correction device when the system is configured to deliver power from an AC power source to a DC load and the plurality of switches forms an inverter when the system is configured to deliver power from a DC power source to an AC load.
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公开(公告)号：US20220085596A1
公开(公告)日：2022-03-17
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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Patent Agency Ranking
公开(公告)号：US20220060146A1
公开(公告)日：2022-02-24
申请号：US17519291
申请日：2021-11-04
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Tiansan LIN , Peng JU
Abstract: Embodiments of this application disclose a design of an inverter and a design of a combiner box, to reduce maintenance costs of a photovoltaic device. According to the inverter or the combiner box provided in the embodiments of this application, when electroluminescence (EL) defect detection is performed on the photovoltaic device, a reverse charging circuit integrated into the inverter or integrated into the combiner box is used to output a direct current to a to-be-tested photovoltaic string of the photovoltaic device. Whether the to-be-tested photovoltaic string has defects is determined based on a light emission status of the to-be-tested photovoltaic string. By using the foregoing designs, maintenance engineers do not need to modify wiring terminals of the photovoltaic device when performing EL defect tests on the photovoltaic device. This helps reduce maintenance costs of the photovoltaic device.
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公开(公告)号：US20250162430A1
公开(公告)日：2025-05-22
申请号：US19029922
申请日：2025-01-17
Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Inventor： Peng YANG , Yu ZHAO , Chenhui HU , Sen QIAO
Abstract: This application provides a control apparatus for a power system of an electric vehicle and a related device thereof. The control apparatus obtains a driving mode of the electric vehicle, a running parameter of the electric vehicle, and a running parameter of the power system, and in response to an accelerator signal or a brake signal of the electric vehicle, outputs a torque allocation ratio of a front drive motor to a rear drive motor based on the driving mode of the electric vehicle, the running parameter of the electric vehicle, and the running parameter of the power system. During implementation of this application, the motor is flexibly controlled by considering impact of a plurality of factors, to achieve good reliability.
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公开(公告)号：US20250158534A1
公开(公告)日：2025-05-15
申请号：US18945929
申请日：2024-11-13
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zisen Qu , Mingquan Zhao , Meiqing Zhang , Kai Xin , Yunfeng Liu
Abstract: A power conversion system which includes N power conversion units and a control unit. The control unit selects a target power conversion unit and a coordinated power conversion unit in a control periodicity, controls an operating mode of the target power conversion unit to be sequentially switched between a PR mode and a MPPT mode, and updates a reference power based on a maximum power obtained in the MPPT mode, for an operating power of the target power conversion unit in the PR mode to be an updated reference power, and the updated reference power is less than or equal to the maximum power. In addition, the control unit controls an operating power of the coordinated power conversion unit to be coordinately adjusted, for a total variation of operating powers of the N power conversion units to be less than a variation threshold.
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公开(公告)号：US20250158397A1
公开(公告)日：2025-05-15
申请号：US19021226
申请日：2025-01-15
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhaohui Wang , Lei Shi , Yongbing Gao
Abstract: A system includes a power supply, a collector, and a photovoltaic inverter. The photovoltaic inverter includes a controllable switch on a direct current side, an inverter unit, a controllable switch on an alternating current side, a collector configured to obtain a power supply parameter of the photovoltaic power supply system, a first controller, and a second controller. When the power supply parameter of the photovoltaic power supply system is greater than or equal to a power supply parameter threshold, the first turns off the controllable switch on the direct current side to disconnect an electrical connection between a power supply and the inverter unit. When the power supply parameter of the photovoltaic power supply system is greater than or equal to the power supply parameter threshold, the second controller turns off the controllable switch on the alternating current side to disconnect an electrical connection between the inverter unit and a load.
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公开(公告)号：US12302536B2
公开(公告)日：2025-05-13
申请号：US17988561
申请日：2022-11-16
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Jinliang Song
Abstract: A cooling system, including at least one liquid cooling module unit, where each liquid cooling module unit includes a liquid storage vessel, and a heat exchange capsule. The liquid storage vessel is configured to store a first cooling medium, the heat exchange capsule is in the liquid storage vessel, at least a part of the heat exchange capsule is arranged to be immersed, in use, in the first cooling medium, the heat exchange capsule is configured to store a second cooling medium, and the first cooling medium is configured to exchange heat with the second cooling medium.
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