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公开(公告)号：US12199566B2
公开(公告)日：2025-01-14
申请号：US17896730
申请日：2022-08-26
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Song Wan , Yongbing Gao , Xun Wang , Yanzhong Zhang , Zhipeng Wu
Abstract: A linkage protection system includes an inverter, an anti-potential-induced degradation (PID) apparatus, and an insulation-monitoring apparatus. The anti-PID apparatus is configured to inject a voltage into an input end or an output end of the inverter, to increase or decrease a voltage-to-earth of a photovoltaic system. The insulation-monitoring apparatus is configured to inject an insulation-monitoring voltage into a direct current (DC) side or an alternating current (AC) side of the inverter. The anti-PID apparatus and the insulation-monitoring apparatus directly or indirectly communicate with each other, to learn of information about whether a peer apparatus is operating, and perform linkage control. The anti-PID apparatus and the insulation-monitoring apparatus operate in different time periods.
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公开(公告)号：US12003130B2
公开(公告)日：2024-06-04
申请号：US17693092
申请日：2022-03-11
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： He Zhou , Zhaohui Wang , Xun Wang , Yanzhong Zhang
CPC classification number: H02J7/00712 , H02J7/0013 , H02J7/0048 , H02J7/005 , H02J7/00714 , H02M3/04 , H02M7/44 , H02S40/38
Abstract: An energy storage system includes one or more energy storage unit clusters, and the energy storage unit cluster includes at least two energy storage modules connected in series. The energy storage system further includes a first bus, a second bus, and a centralized monitoring system of the energy storage unit cluster, where the second bus is a direct current bus. The energy storage unit cluster is coupled to the first bus by using a first converter. One energy storage module includes one energy storage element group and one DC/DC converter, and the energy storage element group is coupled to the second bus by using the DC/DC converter. The centralized monitoring system is connected to the energy storage unit cluster through a control bus, and is configured to control a DC/DC converter in any energy storage module in the energy storage unit cluster.
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公开(公告)号：US11979019B2
公开(公告)日：2024-05-07
申请号：US17446492
申请日：2021-08-31
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Xun Wang , Zhen Cao , Yongbing Gao
CPC classification number: H02H7/122 , H02H7/1213
Abstract: A breaker apparatus and an inverter system are configured to disconnect an electrical connection when a fault occurs in a protected circuit. The breaker apparatus is connected in series in a protected circuit, and is configured to disconnect the electrical connection when a fault occurs in the protected circuit. The breaker apparatus includes a first branch, and a second branch. The first branch includes an overcurrent-automatic-disconnection unit and a first current limiting unit that are connected in series, where the overcurrent-automatic-disconnection unit is configured to be automatically disconnected when a current flowing through the overcurrent-automatic-disconnection unit exceeds a breaking current threshold. The a second branch is configured to be open or closed under control of the controller. The controller is configured to control the first controllable switch unit to be closed when the protected circuit operates normally, and control the first controllable switch unit to be open when a fault occurs in the protected circuit.
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公开(公告)号：US11637431B2
公开(公告)日：2023-04-25
申请号：US17360245
申请日：2021-06-28
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yanzhong Zhang , Xun Wang
Abstract: An inverter includes a direct-current conversion unit, a busbar unit, and an inversion unit. The direct-current conversion unit includes a first positive input terminal, a first negative input terminal, a second positive input terminal, a second negative input terminal, a first direct current DC-to-DC module, a second DC-to-DC module, a first on/off control device, a second on/off control device, a first switch, and a second switch. The first positive input terminal and the first negative input terminal are configured to connect a first photovoltaic string, the second positive input terminal and the second negative input terminal are configured to connect a second photovoltaic string, and a connection relationship of a circuit in the direct-current conversion unit can be changed based on combinations of turning-on or turning-off of the first switch and the second switch.
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公开(公告)号：US11626738B2
公开(公告)日：2023-04-11
申请号：US17353925
申请日：2021-06-22
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yanzhong Zhang , Zhenhuan Shu , Xun Wang
IPC: H02J3/38
Abstract: This application relates to the field of power technologies, and provides a photovoltaic system, which can increase a working voltage of a photovoltaic string. The photovoltaic system includes an adapter circuit, a first photovoltaic string, a second photovoltaic string, and a controller. The controller includes an inverter or a combiner box. The first photovoltaic string and the second photovoltaic string are configured to provide electric energy for the controller. The adapter circuit is configured to be connected to the first photovoltaic string in series, and further configured to connect the second photovoltaic string to the first photovoltaic string in series when a voltage of the first photovoltaic string is lower than a preset threshold.
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Patent Agency Ranking
公开(公告)号：US12136871B2
公开(公告)日：2024-11-05
申请号：US18150999
申请日：2023-01-06
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yanzhong Zhang , Xun Wang
Abstract: An energy combiner apparatus is used to convert output of a power supply, and has three output terminals, so that output ports are increased. In the three output terminals of the energy combiner apparatus, a voltage of 1500 V is output between a first output terminal and a second output terminal, a voltage of 1500 V is also output between the second output terminal and a third output terminal, and a total of 3 kV is output. Therefore, an overall output voltage is increased in a case of equal output power. Because the overall output voltage is increased, a current transmitted on a cable may be reduced. Therefore, a thinner cable may be used, so that costs of the cable are reduced. In addition, four cables conventionally required for connecting to the output terminals of the energy combiner apparatus are reduced to three, so that quantity and costs are reduced.
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公开(公告)号：US12074444B2
公开(公告)日：2024-08-27
申请号：US17694085
申请日：2022-03-14
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yanzhong Zhang , Yongbing Gao , Xun Wang , Roland Huempfner
CPC classification number: H02J3/381 , H02M7/44 , H02J2300/24
Abstract: A power system is disclosed. Output terminals of a power supply or a DC-to-DC unit are cascaded to increase an output voltage, so as to reduce a current between the power supply or the DC-to-DC unit and the DC-to-AC unit, and resolve cost and loss problems of the cable from the power supply or the DC-to-DC unit to the DC-to-AC unit. In addition, according to the power system provided in the embodiments of this application, a quantity of cables from the power supply or the DC-to-DC unit to the DC-to-AC unit may be further reduced by cascading output terminals of the power supply or the DC-to-DC unit and cascading inputs of the DC-to-AC unit, thereby reducing system costs. In addition, in the power system provided in the embodiments of this application, cascaded input and isolated output of the DC-to-AC unit can reduce a specification of a power conversion device.
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公开(公告)号：US20240128763A1
公开(公告)日：2024-04-18
申请号：US18397752
申请日：2023-12-27
Applicant: Huawei Digital Power 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 converter, wherein a first end of the energy storage converter is coupled to at least one of the Q cell strings, and second end of the energy storage converter is configured to connect to a power grid. The first energy storage converter includes a DC/AC conversion unit and at least one DC/DC conversion unit. The 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：US12051905B2
公开(公告)日：2024-07-30
申请号：US17966185
申请日：2022-10-14
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yanzhong Zhang , Yongbing Gao , Xun Wang , Roland Huempfner
CPC classification number: H02J3/38 , H02M3/1582 , H02M5/10
Abstract: Embodiments of this application provide a power system. An output terminal of a power supply or a DC-to-DC unit is cascaded. In addition, according to the power system provided in embodiments of this application, a quantity of cables from the power supply or the DC-to-DC unit to the DC-to-AC unit may be further reduced by cascading an output terminal of the power supply or the DC-to-DC unit and cascading an input of the DC-to-AC unit.
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公开(公告)号：US20230046346A1
公开(公告)日：2023-02-16
申请号：US17966185
申请日：2022-10-14
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yanzhong Zhang , Yongbing Gao , Xun Wang , Roland Huempfner
Abstract: Embodiments of this application provide a power system. An output terminal of a power supply or a DC-to-DC unit is cascaded. In addition, according to the power system provided in embodiments of this application, a quantity of cables from the power supply or the DC-to-DC unit to the DC-to-AC unit may be further reduced by cascading an output terminal of the power supply or the DC-to-DC unit and cascading an input of the DC-to-AC unit.
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