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公开(公告)号：US20230344239A1
公开(公告)日：2023-10-26
申请号：US18345556
申请日：2023-06-30
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yanzhong ZHANG , Hongmiao FANG , Bo YU , Jinxiang ZHAN , Tiansan LIN
IPC: H02J3/38 , H02M1/36 , H02M7/5387
CPC classification number: H02J3/381 , H02M1/36 , H02M7/53871 , H02J2300/24
Abstract: A first input end of a first inverter is connected to a second end of a direct current positive bus, and a second input end of the first inverter is connected to a second end of a neutral bus. A first input end of a second inverter is connected to the second end of the neutral bus, and a second input end of the second inverter is connected to a second end of a direct current negative bus. A controller is configured to control, in startup and shutdown processes, a voltage to ground of the direct current positive bus, a voltage to ground of the direct current negative bus, and a voltage to ground of the neutral bus each to be less than or equal to a preset voltage threshold, to ensure personal safety and device safety.
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2.发明申请公开(公告)号：US20220368126A1
公开(公告)日：2022-11-17
申请号：US17875823
申请日：2022-07-28
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Xiufeng ZHANG , Yanzhong ZHANG
Abstract: A photovoltaic power generation system includes a protection switch and a plurality of DC-DC converters. Each DC-DC converter includes a direct current bus, a DC-DC circuit, and at least one input interface. The input interface is configured to connect to a photovoltaic unit. The photovoltaic unit includes at least one photovoltaic module. The input interface is connected to the direct current bus by using the protection switch, the direct current bus is connected to an input end of the DC-DC circuit, and an output end of the DC-DC circuit is an output end of the DC-DC converter. The protection switch includes a release device and a switching device that are connected in series. The release device is configured to: when a short-circuit fault occurs on a line in which the release device is located, control the switching device to be disconnected.
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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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4.发明公开公开(公告)号：US20240128793A1
公开(公告)日：2024-04-18
申请号：US18398782
申请日：2023-12-28
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yanzhong ZHANG , Zhenhuan SHU , Jianqiang WANG
CPC classification number: H02J13/00034 , H02J3/0012 , H02J13/00001 , H02J13/00002 , H02J2203/10 , H02J2203/20 , H02J2300/24
Abstract: A data processing system in the power station operation and maintenance system may determine a faulty module and a normal module based on module data of each photovoltaic module in a photovoltaic string, and obtain first power generation data of the faulty module and second power generation data of the normal module. Further, the data processing system may determine an annual lost energy yield of the faulty module based on the first power generation data, the second power generation data, and a preset energy yield of the photovoltaic power station, and obtain a target operation and maintenance measure from a plurality of operation and maintenance measures based on the annual lost energy yield. In this case, a communication system in the power station operation and maintenance system may notify an operation and maintenance user of the photovoltaic power station to perform operation and maintenance on the faulty module.
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公开(公告)号：US20230336119A1
公开(公告)日：2023-10-19
申请号：US18338770
申请日：2023-06-21
Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Inventor： Xinyu YU , Kai XIN , Peng DONG , Yongbing GAO , Yanzhong ZHANG
CPC classification number: H02S40/32 , H02J3/381 , H02S40/34 , H02J2300/26
Abstract: An example system includes an inverter and at least one combiner box. The combiner box includes a plurality of direct current-direct current (DC-DC) circuits and one controller. The controller is configured to: when an output voltage of the combiner box is greater than or equal to a first preset voltage and less than or equal to a second preset voltage, control the combiner box to output a maximum power. When the output voltage of the combiner box is greater than the second preset voltage, the controller controls an output power of the combiner box to decrease as the output voltage increases. The second preset voltage is greater than the first preset voltage, and the maximum power is a sum of maximum powers of all photovoltaic strings connected to the combiner box.
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Patent Agency Ranking
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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公开(公告)号：US20220352849A1
公开(公告)日：2022-11-03
申请号：US17868105
申请日：2022-07-19
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Jianqiang WANG , Yuandong MENG , Song WAN , Yanzhong ZHANG
Abstract: A photovoltaic string location update method and apparatus includes: obtaining, based on a physical map, a physical location of a first photovoltaic string corresponding to a first logical location in the physical map, the physical map indicating a correspondence between a logical location of a photovoltaic string and a physical location of the photovoltaic string, and the photovoltaic string includes the first photovoltaic string; and when the physical location of the first photovoltaic string in the physical map is different from a first actual physical location of the first photovoltaic string, updating the physical location of the photovoltaic string in the physical map to the first actual physical location, to obtain an updated physical map. The first actual physical location of the photovoltaic string is inconsistent with the physical location in the physical map, to prepare for subsequent operation and maintenance accurately performed on the photovoltaic string.
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公开(公告)号：US20220337186A1
公开(公告)日：2022-10-20
申请号：US17711243
申请日：2022-04-01
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Wuben SUN , Song WAN , Kai YIN , Yanzhong ZHANG , Huiping LIU , Yue ZHENG
Abstract: A photovoltaic system includes the photovoltaic module, an electric energy conversion apparatus, an inverter, and a computing device. The computing device determines whether output power of the photovoltaic module meets a first preset condition, where the first preset condition is that the output power is greater than or equal to a first preset output power; when the first preset condition is met, the computing device determines to set the photovoltaic module to a default configuration direction, where the default configuration direction is a photovoltaic module orientation in which sunlight is irradiated onto the photovoltaic module with a minimum incident angle; and when the first preset condition is not met, the computing device determines to set the photovoltaic module to a target orientation, where the target orientation is different from the default configuration direction.
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公开(公告)号：US20220285948A1
公开(公告)日：2022-09-08
申请号：US17825108
申请日：2022-05-26
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Xiaofeng YAO , Yanzhong ZHANG , Guilei GU
Abstract: A photovoltaic system, an optimizer, a controller, a computer program product, a computer-readable storage medium, a chip, and a method for adjusting a working state of an optimizer are provided. The photovoltaic system includes a photovoltaic panel and an optimizer. The optimizer includes a controller, a first output port, and a second output port. The controller is configured to detect an electrical signal parameter between the first output port and the second output port. The controller is configured to adjust a working state of the optimizer from a no-output state or a limited-output state to an unlimited-output state when the electrical signal parameter changes. In the photovoltaic system, the working state can be adjusted without using an unlocking apparatus, so that an implementation is simple, and costs are reduced.
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公开(公告)号：US20220166377A1
公开(公告)日：2022-05-26
申请号：US17669724
申请日：2022-02-11
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Jianqiang WANG , Song WAN , Yanzhong ZHANG , Yongbing GAO
Abstract: This application discloses a method and an apparatus for detecting a solar cell of a photovoltaic plant. The method includes: obtaining a first infrared image and a second infrared image, where the first infrared image includes infrared image information corresponding to an ambient infrared signal reflected by a to-be-detected solar cell operating in a short-circuit state, the second infrared image includes infrared image information corresponding to an infrared signal emitted by the to-be-detected solar cell operating in a first state and infrared image information corresponding to an ambient infrared signal reflected by the to-be-detected solar cell, and the first state is another state other than the short-circuit state; and detecting, based on the first infrared image and the second infrared image, whether the to-be-detected solar cell has a defect.
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