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公开(公告)号：US20210126671A1
公开(公告)日：2021-04-29
申请号：US17137915
申请日：2020-12-30
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yongbing Gao , Yanzhong Zhang , Tiansan Lin , Wei Shui , Chen Wang
Abstract: An inverter in a power generation system converts a direct current that is input from a direct-current-side device into an alternating current for power supply. The inverter includes a control apparatus and a communications apparatus. The control apparatus controls the inverter to convert the direct current that is input from the direct-current-side device into an alternating current for power supply. The communications apparatus is coupled to the control apparatus, and sends a networking information request signal used to request networking information to the direct-current-side device in the power generation system through a direct-current power line, where a frequency of the networking information request signal is within a first frequency band. The communications apparatus also receives the networking information from the direct-current-side device; and sends a control signal to the direct-current-side device, where a frequency of the control signal is within a second frequency band.
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公开(公告)号：US10447225B2
公开(公告)日：2019-10-15
申请号：US15794817
申请日：2017-10-26
Applicant: Huawei Technologies Co., Ltd.
Inventor： Changsheng Pei , Yongbing Gao , Heling Zhang
Abstract: A filter apparatus, which includes a feedback active common-mode filter and a feed-forward active common-mode filter, the feedback active common-mode filter includes a common-mode noise detection component and a first filter circuit, and the feed-forward active common-mode filter includes the common-mode noise detection component and a second filter circuit, where the first filter circuit is connected between the common-mode noise detection component and the device, and performs feedback filtering on a first common-mode noise signal, to obtain a second common-mode noise signal; the common-mode noise detection component is connected between the first filter circuit and the second filter circuit, detects the second common-mode noise signal, and provides the second filter circuit with the second common-mode noise signal; and the second filter circuit is connected between an external power source and the common-mode noise detection component, and performs feed-forward filtering on the second common-mode noise signal.
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3.发明申请公开(公告)号：US20180375471A1
公开(公告)日：2018-12-27
申请号：US16121197
申请日：2018-09-04
Applicant: Huawei Technologies Co., Ltd.
Inventor： Guangping Yang , Yongbing Gao
Abstract: A method, an apparatus, and a device for identifying a cell string fault in an optoelectronic system, where the method includes obtaining at least two groups of current-voltage (I-V) values of a first cell string in the optoelectronic system, performing fitting processing according to the at least two groups of I-V values using a predetermined physical string model to obtain at least one characteristic parameter of the first cell string, and comparing the at least one characteristic parameter with a pre-obtained standard characteristic parameter to determine whether the first cell string is faulty, or performing curve fitting processing on collected data using the physical string model. Therefore, identifying the cell string fault in the optoelectronic system is not affected by inconsistency of environments, and processing efficiency and accuracy of string fault identification are effectively improved.
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公开(公告)号：US20170222601A1
公开(公告)日：2017-08-03
申请号：US15484702
申请日：2017-04-11
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yunyan Xu , Yongbing Gao
Abstract: A method and an apparatus for monitoring a photovoltaic module to reduce a commissioning workload and reduce commissioning complexity, the method includes obtaining communication addresses of all module voltage monitoring apparatuses, establishing a connection to a corresponding module voltage monitoring apparatus using the communication address, obtaining a relative voltage of a corresponding module relative to a voltage reference point from the module voltage monitoring apparatus to which the connection is established; obtaining, according to relative voltages obtained from all the module voltage monitoring apparatuses, a physical location that is of a module corresponding to each module voltage monitoring apparatus and that is in the photovoltaic string; establishing an information table according to the communication address of each module voltage monitoring apparatus and the physical location of the module corresponding to each module voltage monitoring apparatus, and performing module abnormality detection according to the information table.
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公开(公告)号：US10103689B2
公开(公告)日：2018-10-16
申请号：US15822716
申请日：2017-11-27
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yunyan Xu , Yongbing Gao
Abstract: The present invention relates to the photoelectric field, and provides a power supply system and a power supply method, so as to reduce costs of a lead between a positive electrode or a negative electrode of a photovoltaic panel and a direct current voltage source. The power supply system includes: a photovoltaic panel string, an inverter connected to the photovoltaic panel string, and a transformer connected to the inverter. The power supply system further includes a voltage controller. The voltage controller includes a first terminal, a second terminal, and a third terminal. The voltage controller further includes: a first sampling unit, a control unit connected to the first sampling unit, and an inverter unit.
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Patent Agency Ranking
公开(公告)号：US11011999B2
公开(公告)日：2021-05-18
申请号：US16881796
申请日：2020-05-22
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yongbing Gao , Yanfeng Li , Xun Wang
Abstract: A power supply system includes at least one inverter, at least one cell string, and a transformer, where an input end of the at least one inverter is connected to an output end of the at least one cell string, an output end of the at least one inverter is connected to an input end of the transformer, and an output end of the transformer is configured to output a power supply voltage. The output end of the at least one inverter is connected to an output end of an inverter unit.
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公开(公告)号：US10171028B2
公开(公告)日：2019-01-01
申请号：US15484702
申请日：2017-04-11
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yunyan Xu , Yongbing Gao
Abstract: A method and an apparatus for monitoring a photovoltaic module to reduce a commissioning workload and reduce commissioning complexity, the method includes obtaining communication addresses of all module voltage monitoring apparatuses, establishing a connection to a corresponding module voltage monitoring apparatus using the communication address, obtaining a relative voltage of a corresponding module relative to a voltage reference point from the module voltage monitoring apparatus to which the connection is established; obtaining, according to relative voltages obtained from all the module voltage monitoring apparatuses, a physical location that is of a module corresponding to each module voltage monitoring apparatus and that is in the photovoltaic string; establishing an information table according to the communication address of each module voltage monitoring apparatus and the physical location of the module corresponding to each module voltage monitoring apparatus, and performing module abnormality detection according to the information table.
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公开(公告)号：US20210313880A1
公开(公告)日：2021-10-07
申请号：US17350191
申请日：2021-06-17
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yongbing Gao , Jun Wang , Lei Shi
Abstract: A direct current (DC)/DC conversion circuit includes an input end, a power circuit, and an output end, a bypass circuit that is a unidirectional conduction circuit, and a switch disposed between the input end and the power circuit, where the input end is configured to be coupled to an external power supply to receive power to the DC/DC conversion circuit. The bypass circuit is coupled between the input end and the power circuit, the bypass circuit is disposed between the switch and the power circuit, and the bypass circuit is coupled to the power circuit in parallel. The switch is configured to be closed when the input end is reversely coupled to the external power supply to enable a current from a positive electrode of the external power supply to flow back to a negative electrode of the external power supply through the bypass circuit and the switch.
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公开(公告)号：US10985696B2
公开(公告)日：2021-04-20
申请号：US16121197
申请日：2018-09-04
Applicant: Huawei Technologies Co., Ltd.
Inventor： Guangping Yang , Yongbing Gao
Abstract: A method, an apparatus, and a device for identifying a cell string fault in an optoelectronic system, where the method includes obtaining at least two groups of current-voltage (I-V) values of a first cell string in the optoelectronic system, performing fitting processing according to the at least two groups of I-V values using a predetermined physical string model to obtain at least one characteristic parameter of the first cell string, and comparing the at least one characteristic parameter with a pre-obtained standard characteristic parameter to determine whether the first cell string is faulty, or performing curve fitting processing on collected data using the physical string model. Therefore, identifying the cell string fault in the optoelectronic system is not affected by inconsistency of environments, and processing efficiency and accuracy of string fault identification are effectively improved.
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公开(公告)号：US20200287476A1
公开(公告)日：2020-09-10
申请号：US16881796
申请日：2020-05-22
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yongbing Gao , Yanfeng Li , Xun Wang
Abstract: A power supply system includes at least one inverter, at least one cell string, and a transformer, where an input end of the at least one inverter is connected to an output end of the at least one cell string, an output end of the at least one inverter is connected to an input end of the transformer, and an output end of the transformer is configured to output a power supply voltage. The output end of the at least one inverter is connected to an output end of an inverter unit.
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