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公开(公告)号：US20220200290A1
公开(公告)日：2022-06-23
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
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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2.发明公开公开(公告)号：US20240014684A1
公开(公告)日：2024-01-11
申请号：US18473022
申请日：2023-09-22
Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Inventor： Dong CHEN , Yongbing GAO , Xun WANG
CPC classification number: H02J13/00002 , G05B9/02
Abstract: A power sourcing equipment includes a residual current detection unit, a voltage detection unit, and a controller. The controller determines an insulation resistance value at the input end of the power sourcing equipment based on a first preset voltage parameter value, a first residual current value, a second preset voltage parameter value, and a second residual current value. The first residual current value is a residual current value of the power sourcing equipment when a voltage parameter of the power sourcing equipment includes the first preset voltage parameter value. The second residual current value is a residual current value of the power sourcing equipment when the voltage parameter of the power sourcing equipment includes the second preset voltage parameter value.
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公开(公告)号：US20230086269A1
公开(公告)日：2023-03-23
申请号：US18071847
申请日：2022-11-30
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Dong CHEN , Yongbing GAO , Lei SHI , Xun WANG
Abstract: A fault protection apparatus includes a first diode, a first switch component, a control unit, a first port, a second port, a third port, a fourth port, and a fifth port. The first port is connected to a positive common direct current bus of the common direct current bus. The second port is connected to a negative common direct current bus of the common direct current bus. The third port is connected to a positive local bus of a branch on which the fault protection apparatus is located. The fourth port is connected to a negative local bus of the branch on which the fault protection apparatus is located. The first diode and the first switch component are connected to the power system through the first port, the second port, the third port, and the fourth port.
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Patent Agency Ranking
公开(公告)号：US20220294388A1
公开(公告)日：2022-09-15
申请号：US17826903
申请日：2022-05-27
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Xun WANG , Yanzhong ZHANG
Abstract: Embodiments of this application disclose a photovoltaic system, to resolve a problem of high costs per kilowatt hour of a photovoltaic system. The photovoltaic system includes a first photovoltaic array, a first power converter, a second photovoltaic array, a second power converter, an energy storage converter, a storage battery, and a photovoltaic inverter. The first photovoltaic array is connected to the photovoltaic inverter through the first power converter. The second photovoltaic array is directly connected to the energy storage converter, or at least one part of the second photovoltaic array is connected to the energy storage converter through the second power converter. The energy storage converter is connected to the photovoltaic inverter and the storage battery. The photovoltaic inverter is connected to a power grid.
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公开(公告)号：US20220263321A1
公开(公告)日：2022-08-18
申请号：US17738379
申请日：2022-05-06
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yanzhong ZHANG , Zhenhuan SHU , Xun WANG
Abstract: A photovoltaic control apparatus and method, and a system, and relates to the field of photovoltaic power generation technologies, to reduce the system costs. The apparatus is applied to a photovoltaic system including a plurality of strings. The apparatus includes a control circuit, a first path circuit, a second path circuit, and an inverter circuit. The control circuit is configured to control a direct current signal of at least one first string in the plurality of strings to be transmitted by using the first path circuit. The first path circuit is configured to perform MPPT processing on the direct current signal of the first string. The control circuit is further configured to control a direct current signal of at least one second string in the plurality of strings to be transmitted by using the second path circuit.
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公开(公告)号：US20230163675A1
公开(公告)日：2023-05-25
申请号：US18150999
申请日：2023-01-06
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yanzhong ZHANG , Xun WANG
CPC classification number: H02M1/007 , H02J3/381 , H02M1/32 , H02M5/12 , H02M7/493 , H02M3/06 , H02J2300/24
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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7.发明公开公开(公告)号：US20230155382A1
公开(公告)日：2023-05-18
申请号：US18156558
申请日：2023-01-19
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Xun WANG
CPC classification number: H02J3/12 , H02J3/381 , H02J2300/24
Abstract: A voltage compensation apparatus, an inverter apparatus, and a photovoltaic power generation system. The system includes a photovoltaic panel string and an inverter apparatus. The inverter apparatus includes an inverter and a voltage compensation apparatus. One pole of a power output terminal of the voltage compensation apparatus is coupled and connected to an N wire in a power grid. In this way, the power output terminal of the voltage compensation apparatus can be directly coupled and connected to the N wire in the power grid, to form a power compensation loop, and there is no need to form a power compensation loop based on a grounding wire of the inverter. Therefore, an electric shock risk that exists when a person unintentionally comes into contact with a housing of the inverter can be eliminated.
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公开(公告)号：US20220200314A1
公开(公告)日：2022-06-23
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
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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