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公开(公告)号：US11438026B2
公开(公告)日：2022-09-06
申请号：US17137915
申请日：2020-12-30
Applicant: Huawei Digital Power 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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Patent Agency Ranking
公开(公告)号：US12136808B2
公开(公告)日：2024-11-05
申请号：US17701940
申请日：2022-03-23
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yongbing Gao , Chen Wang , Tiansan Lin , Yang Hu
Abstract: A photovoltaic power generation system includes an inverter, a controller, and at least two direct current branch circuits. The leakage current detection apparatus is configured to: detect a leakage current of the direct current branch circuit on which the leakage current detection apparatus is located and send the leakage current to the controller. The controller is further configured to: when the photovoltaic power generation system runs and a value of a leakage current of the direct current branch circuit exceeds a preset range, determine that an insulation fault occurs on the direct current branch circuit. The system can determine the direct current branch circuit on which the insulation fault occurs in the photovoltaic power generation system, so that measures are taken in time for the direct current branch circuit on which the insulation fault occurs, to eliminate a potential safety hazard.
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公开(公告)号：US11791719B2
公开(公告)日：2023-10-17
申请号：US17443730
申请日：2021-07-27
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yongbing Gao , Chen Wang , Zhaopeng Liu
Abstract: A device for resolving common-mode voltage interference is applied to a power supply system including a power converter and a switch mechanism. Each phase of an output end of the power converter is connected to a downstream circuit by using the switch mechanism. The switch mechanism includes a first switch and a second switch. The device includes a controller and a passive component. Two ends of the first switch in at least one phase of the output end of the power converter are connected in parallel to the passive component, and the controller controls the second switch to be turned on, and when a voltage difference between the two ends of the first switch is less than a preset voltage, controls the first switch to be turned on. In this manner, the switch mechanism is protected, thereby prolonging a service life of the switch mechanism.
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公开(公告)号：US11532938B2
公开(公告)日：2022-12-20
申请号：US17471794
申请日：2021-09-10
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Jincheng Shao , Jixin Zhu , Xiaowei Xie , Chen Wang
Abstract: A power supply circuit includes a first input end (IN1), a second input end (IN2), a first output end (OUT1), and a second output end (OUT2). An input end of a first voltage conversion circuit (VCC) is used as IN1 and connected to an output end of a solar panel. A first output end of the first VCC is used as OUT1 and connected to a first power supply end of a monitoring chip. A second output end of the first VCC is connected to an input end of an energy storage module. An input end of the rectifier circuit is used as IN2 and connected to an AC power network. An output end of the rectifier circuit is connected to an input end of a second VCC. An output end of the second VCC and an output end of the energy storage module are used as OUT2 and connected to a second power supply end of the monitoring chip.
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公开(公告)号：US20230208354A1
公开(公告)日：2023-06-29
申请号：US18173762
申请日：2023-02-23
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Chen Wang , Yanzhong Zhang
Abstract: A combiner box includes a switching device, a sampling circuit, and a controller. The switching device is connected in parallel between a positive input port and a negative input port. The sampling circuit is configured to collect at least one of an input parameter and an output parameter of the combiner box. The controller is configured to control the switching device to be closed when determining, based on the at least one parameter, that a short circuit occurs between a positive output cable and a negative output cable or a positive output cable and a negative output cable are reversely connected, so that the switching device, the positive input port, and the negative input port form a closed loop.
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公开(公告)号：US11500001B2
公开(公告)日：2022-11-15
申请号：US17486506
申请日：2021-09-27
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Chen Wang , Xiaowei Xie , Yang Hu
Abstract: An insulation resistance detection circuit and method are disclosed. The circuit includes a controller configured to: open a first relay, and close second relays, or switch an on/off status of at least one of the second relays; determine, based on a first measurement value between a positive input terminal of an inverter circuit and an earthing point, whether the positive input terminal of the inverter circuit is short-circuited or has low resistance to protective earthing; and determine, based on a second measurement value between a negative input terminal of the inverter circuit and the earthing point, whether the negative input terminal of the inverter circuit is short-circuited or has low resistance to protective earthing, where the first relay is one of in M relays and is connected to at least one impedor in parallel, and the second relays are relays other than the first relay in the M relays.
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