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Patent Agency Ranking
公开(公告)号：US20200159269A1
公开(公告)日：2020-05-21
申请号：US16748071
申请日：2020-01-21
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yongbing GAO , Guilei GU
Abstract: Embodiments of this application disclose a control method for a photovoltaic power generation system and a photovoltaic power generation system, to reduce a photovoltaic energy loss. The method includes: presetting, by the photovoltaic power generation system, an upper limit value for each converter in the photovoltaic power generation system, where the upper limit value is a maximum voltage value of an output voltage to ground of the converter, and the output voltage to ground is a voltage difference between a positive output end of the converter and a ground point of the photovoltaic power generation system; and limiting, by the photovoltaic power generation system, an output voltage to ground of a target converter based on an upper limit value corresponding to the target converter, where the target converter may be any converter in the photovoltaic power generation system.
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2.发明申请公开(公告)号：US20210408965A1
公开(公告)日：2021-12-30
申请号：US17446853
申请日：2021-09-03
Applicant: Huawei Technologies Co., Ltd.
Inventor： Guilei GU
Abstract: This application discloses a method, an apparatus, and a system for obtaining electronic layout applied to photovoltaic array in the field of equipment installation management. According to the method, the electronic device identifies each first area in a target picture to obtain position information and a module identifier of at least one photovoltaic module in each first area, and may directly obtain an electronic layout based on the position information and the module identifier of each photovoltaic module. In this way, a product identifier of each converter does not need to be manually obtained, and a photovoltaic module does not need to be manually added to the electronic layout. This reduces labor time consumption and improves efficiency of obtaining the electronic layout.
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公开(公告)号：US20210050816A1
公开(公告)日：2021-02-18
申请号：US17088023
申请日：2020-11-03
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Abstract: Embodiments of this application disclose a fault point position determining method and apparatus and a photovoltaic system, to correctly and efficiently determine a fault point position when a disconnection fault occurs in a photovoltaic system. The method is applied to a photovoltaic system, the photovoltaic system includes at least one inverter and at least one photovoltaic unit, each photovoltaic unit includes at least one photovoltaic module and one photovoltaic module controller, and the method includes: sending, by an inverter, a first test signal to the at least one photovoltaic unit; obtaining, by the inverter, first test signal characteristic information fed back by the at least one photovoltaic unit; and performing, by the inverter, absolute value or relative value sorting on the at least one piece of first test signal characteristic information, and determining a fault point in the photovoltaic system based on a sorting result.
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4.发明申请公开(公告)号：US20200083716A1
公开(公告)日：2020-03-12
申请号：US16682260
申请日：2019-11-13
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Guilei GU
Abstract: Embodiments relate to the field of photoelectric technologies, and provide a method for controlling photovoltaic power generation, a control device, and a photovoltaic power generation system. The method is applied to the photovoltaic power generation system. The system includes at least one photovoltaic string and a control device, the photovoltaic string includes at least one photovoltaic module, each photovoltaic module includes a photovoltaic unit and an optimizer that is connected to the photovoltaic unit, and the photovoltaic unit includes at least one photovoltaic component. The method includes: periodically sending, by the control device, an output voltage reference value update instruction to an optimizer in each photovoltaic string; and receiving, by the optimizer in each photovoltaic string, the output voltage reference value update instruction, and updating an output voltage reference value according to the output voltage reference value update instruction.
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公开(公告)号：US20210351592A1
公开(公告)日：2021-11-11
申请号：US17382607
申请日：2021-07-22
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Guilei GU , Xiaofeng YAO
Abstract: A converter includes a controller and at least one switching transistor. The converter supports access of at least two photovoltaic units, the at least two photovoltaic units are connected in series inside the converter by using the switching transistor, and the photovoltaic unit is formed by at least one photovoltaic component connected in series and in parallel. The controller is configured to: when a shutdown instruction is received or a heartbeat instruction is lost within a preset time period, control the switching transistor to be disconnected, so that any two photovoltaic units connected in series are disconnected. According to the converter provided in this application, any two photovoltaic units connected in series can be disconnected when the photovoltaic power generation system is shut down. In this way, no dangerous high voltage exists in a photovoltaic array formed by the photovoltaic units, thereby improving safety of the photovoltaic power generation system.
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