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公开(公告)号：US20210391709A1
公开(公告)日：2021-12-16
申请号：US17446492
申请日：2021-08-31
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xun WANG , Zhen CAO , Yongbing GAO
Abstract: A breaker apparatus and an inverter system are configured to disconnect an electrical connection when a fault occurs in a protected circuit. The breaker apparatus is connected in series in a protected circuit, and is configured to disconnect the electrical connection when a fault occurs in the protected circuit. The breaker apparatus includes a first branch, and a second branch. The first branch includes an overcurrent-automatic-disconnection unit and a first current limiting unit that are connected in series, where the overcurrent-automatic-disconnection unit is configured to be automatically disconnected when a current flowing through the overcurrent-automatic-disconnection unit exceeds a breaking current threshold. The a second branch is configured to be open or closed under control of the controller. The controller is configured to control the first controllable switch unit to be closed when the protected circuit operates normally, and control the first controllable switch unit to be open when a fault occurs in the protected circuit.
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公开(公告)号：US20210328436A1
公开(公告)日：2021-10-21
申请号：US17362119
申请日：2021-06-29
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yongbing GAO , Panpan WANG , Chengfeng JIANG
Abstract: A photovoltaic converter string is provided, to control, one of switching transistors in a buck/boost circuit of the photovoltaic converter to be conducted, wherein the switching transistors are connected in parallel to a bypass diode; and control the other switching transistors in the buck/boost circuit to be cut off. Therefore, an output voltage of the photovoltaic converter is applied to both ends of the non-conducted switching transistor in the switching transistors connected in parallel to the bypass diode, and after the output voltage of the photovoltaic converter reaches a breakdown voltage of the non-conducted switching transistor, an avalanche breakdown occurs on the non-conducted switching transistor, and a voltage of both ends of the bypass diode connected to a positive output end and a negative output end of the photovoltaic converter is clamped to be less than or equal to the breakdown voltage of the switching transistor.
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公开(公告)号：US20180048223A1
公开(公告)日：2018-02-15
申请号：US15794817
申请日：2017-10-26
Applicant: Huawei Technologies Co., Ltd.
Inventor： Changsheng PEI , Yongbing GAO , Heling ZHANG
CPC classification number: H03H1/0007 , H02J3/01 , H02J3/1835 , H02J3/24 , H02M1/12 , H02M2001/123 , H03D3/08 , H03H7/427 , Y02E40/30 , Y02E40/40
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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公开(公告)号：US20210408968A1
公开(公告)日：2021-12-30
申请号：US17473534
申请日：2021-09-13
Applicant: Huawei Technologies Co., Ltd.
Inventor： Jianqiang WANG , Song WAN , Yanzhong ZHANG , Yongbing GAO , Xinyu YU
Abstract: A fault detection apparatus includes an image capture module and a detection module, and the fault detection apparatus is configured to capturing an image of the photovoltaic module in a light emitting state, and performing fault detection on the photovoltaic module based on the image when a signal-to-noise ratio of the image is maximized, to identify a fault type of the photovoltaic module.
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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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Patent Agency Ranking
公开(公告)号：US20180083571A1
公开(公告)日：2018-03-22
申请号：US15822716
申请日：2017-11-27
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yunyan XU , Yongbing GAO
CPC classification number: H02S40/38 , G05F1/67 , H02J3/383 , H02J7/35 , H02M7/493 , H02M7/797 , H02M2001/123 , H02S40/30 , H02S40/32 , H02S50/00 , H02S50/10
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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公开(公告)号：US20210408909A1
公开(公告)日：2021-12-30
申请号：US17473511
申请日：2021-09-13
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yongbing GAO , Jun WANG , Lei SHI
IPC: H02M3/158
Abstract: This application relates to the field of circuit technologies, and provides a step-up circuit and a step-up circuit control method. The step-up circuit includes a power supply, an inductor, N switch components, N-1 flying capacitors, N flyback diodes, a pre-charge unit, and an output unit. The N switch components are connected in series, a first switch component of the N switch components is connected to a first terminal of the power supply through the inductor, and an Nth switch component is connected to a second terminal of the power supply. At least two switch components of the N switch components have withstand voltage specifications different from each other. Values of voltages withstood by switch components with different withstand voltage specifications during normal operation are also different from each other. N is a positive integer.
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8.发明申请公开(公告)号：US20180166883A1
公开(公告)日：2018-06-14
申请号：US15893125
申请日：2018-02-09
Applicant: Huawei Technologies Co., Ltd.
Inventor： Kai XIN , Haibin GUO , Yongbing GAO
IPC: H02J3/38
CPC classification number: H02J3/385 , H02J3/38 , H02J3/383 , H02J2003/001 , H02M7/5395 , H02S40/32 , Y02E10/563 , Y02E10/58
Abstract: The present application provides a low voltage ride-through control system for a multi-inverter grid-connected power converter, including: a photovoltaic array and an inverter. The inverter includes a DC/DC conversion unit and a DC/AC inversion unit connected to an output end of the DC/DC conversion unit, an input end of the DC/DC conversion unit is connected to an output end of the photovoltaic array, and the inverter is connected to a power grid at a grid-connected point. The inverter further includes a low voltage ride-through detection unit and a low voltage ride-through control unit. The low voltage ride-through detection unit is configured to determine whether to trigger low voltage ride-through. The low voltage ride-through control unit is configured to lower an input voltage of the DC/DC conversion unit when it is determined to trigger the low voltage ride-through, to lower an output voltage of the photovoltaic array.
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公开(公告)号：US20210408800A1
公开(公告)日：2021-12-30
申请号：US17447485
申请日：2021-09-13
Applicant: Huawei Technologies Co., Ltd.
Inventor： Minghui XU , Tiansan LIN , Yongbing GAO
Abstract: An inverter apparatus is disclosed in this application, which includes a plurality of protection units and a plurality of inverter units. For any protection unit, when a voltage at an input terminal of the protection unit is greater than a voltage at an output terminal of the protection unit, a path between the input terminal and the output terminal of the protection unit is in a forward conducted state; when the voltage at the output terminal of the protection unit is greater than the voltage at the input terminal voltage of the protection unit, the path between the input terminal and the output terminal of the protection unit is in a reverse cut-off state; and when a control terminal of the protection unit receives a first trigger signal, the path between the input terminal and the output terminal of the protection unit is in a reverse conducted state.
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公开(公告)号：US20210359597A1
公开(公告)日：2021-11-18
申请号：US17443730
申请日：2021-07-27
Applicant: Huawei 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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