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公开(公告)号：US12301007B2
公开(公告)日：2025-05-13
申请号：US18273249
申请日：2022-03-02
Applicant: Sungrow Power Supply Co., Ltd.
Inventor： Qiaodi Chen , Yu Yang , Jun Xu
Abstract: A shutdown device for a photovoltaic module, an inverter, a rapid shutdown system, and a method for starting the rapid shutdown system are provided. The method is applied to the rapid shutdown system after each shutdown device in the rapid shutdown system initially starts. The shutdown device is switched into a mode of unlimited output in response to its success in initially starting. The shutdown device, in response to its failure to initially start or when being switched off, samples an electrical parameter at its output terminal in real time, determines whether the electrical parameter meets a preset starting condition, and switches itself on and operates in the mode of unlimited output when the electrical parameter already meets the preset starting condition.
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公开(公告)号：US12119644B2
公开(公告)日：2024-10-15
申请号：US17914702
申请日：2021-03-08
Applicant: Sungrow Power Supply Co., Ltd.
Inventor： Yu Yang , Yanfei Yu , Jun Xu , Qiaodi Chen
CPC classification number: H02J3/001 , H02J3/38 , H02J2300/26
Abstract: A method for controlling a photovoltaic rapid shutdown system, an inverting system, and a photovoltaic rapid shutdown system. In the photovoltaic rapid shutdown system, the inverting system determines whether the photovoltaic rapid shutdown system is to enter a safe mode, introduces fluctuations onto a direct-current bus in the photovoltaic rapid shutdown system in response to the photovoltaic rapid shutdown system being not to enter the safe mode, and otherwise does not introduce the fluctuations onto the direct-current bus. A shutdown device for a photovoltaic module determines according to an output parameter thereof whether an electrical parameter on the direct-current bus connected to the shutdown device meets a preset condition, controls itself to be turned on or maintains itself being on in response to the electrical parameter meeting the preset condition, and otherwise controls itself to be turned off or maintains itself being off.
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公开(公告)号：US20240146067A1
公开(公告)日：2024-05-02
申请号：US18279141
申请日：2022-03-03
Applicant: Sungrow Power Supply Co., Ltd.
Inventor： Qiaodi Chen , Yu Yang , Jun Xu
CPC classification number: H02J3/38 , H02J3/001 , H02J3/01 , H02J2300/26
Abstract: A rapid shutdown system and a method for controlling the rapid shutdown system are provided. A disturbance is applied to a direct-current side of an inverter in the rapid shutdown system only when the inverter does not meet a starting condition, i.e., before the inverter starts. Once meeting the starting condition, the inverter normally operates. A shutdown device in the rapid shutdown system determines its state by determining whether the electrical signal at its output end meets the preset condition, and switches itself on or off in response to its determination.
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公开(公告)号：US20240021358A1
公开(公告)日：2024-01-18
申请号：US18037518
申请日：2021-05-06
Applicant: Sungrow Power Supply Co., Ltd.
Inventor： Guoqing Cai , Jiacai Zhuang , Jun Xu , Wei Liu
CPC classification number: H01F27/306 , H01F27/24 , H01F27/29
Abstract: The present invention provides a transformer, which is applied to the technical field of power transmission and distribution, the transformer comprising an iron core, body windings, and a semi-conductive layer, the body windings being sleeved on a core post of the iron core, and the semi-conductive layer being correspondingly provided with the body windings. Auxiliary circuits are connected to the body windings, the auxiliary circuits and preset positions of the body windings have equal potentials, and an equipotential connection point of the semi-conductive layer is provided by the auxiliary circuits. After the semi-conductive layer is connected to the auxiliary circuits, the effect of balancing the electric field distribution of a winding can be achieved. In the transformer provided in the present invention, an equipotential connection point having an equal potential with the preset positions of the body windings of the transformer is provided by means of the auxiliary circuits, and the semi-conductive layer is directly connected to the equipotential connection point, thereby achieving set effects of the semi-conductive layer, that is, improving the electric field distribution of windings, and improving the high-voltage insulation performance of the transformer without damaging the insulation between litz wire strands.
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5.发明授权公开(公告)号：US11841724B2
公开(公告)日：2023-12-12
申请号：US17519659
申请日：2021-11-05
Applicant: Sungrow Power Supply Co., Ltd.
CPC classification number: G05F1/06 , G05F1/5735
Abstract: A module level power electronics (MLPE) photovoltaic system and a method for photovoltaic string control are provided. The method is applied to a control unit in the MLPE photovoltaic system. The control unit detects an output current of each photovoltaic string in the MLPE photovoltaic system, and then controls, for photovoltaic strings connected in parallel to a same inverter in the MLPE photovoltaic system, a voltage of a photovoltaic string with larger output current to be reduced, or controls a voltage of a photovoltaic string with smaller output current to be increased, so that backflow current can be reduced to preset range tolerable for MLPE device. The method is from a perspective of the MLPE photovoltaic system, the backflow current is limited by controlling voltage change of associated photovoltaic string without additional hardware cost, effectively protecting MLPE device in the MLPE photovoltaic system.
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Patent Agency Ranking
公开(公告)号：US11671015B2
公开(公告)日：2023-06-06
申请号：US17040512
申请日：2019-12-30
Applicant: SUNGROW POWER SUPPLY CO., LTD.
Inventor： Tengfei Wang , Jiacai Zhuang , Jun Xu , Nianan Pan
CPC classification number: H02M3/1584 , H02M1/322 , H02M3/1552
Abstract: A three-level Boost circuit is provided. The three-level Boost circuit includes: an input capacitor, an inductor, a first switch, a second switch, a first freewheeling diode, a second freewheeling diode, a flying capacitor, a balance capacitor, a charging diode, a clamp diode, a discharging diode and an output series capacitor bank. The output series capacitor bank includes multiple output capacitors connected in series, and has a first node and a second node; a potential of the first node is higher than a potential of a cathode of the charging diode, and a potential difference between a cathode of the second freewheeling diode and the second node does not exceed a withstand voltage of the second freewheeling diode.
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公开(公告)号：US20230041986A1
公开(公告)日：2023-02-09
申请号：US17792693
申请日：2021-03-08
Applicant: Sungrow Power Supply Co., Ltd.
Inventor： Yu Gu , Jiangsong Li , Jian Guo , Jun Xu
IPC: H02J3/38
Abstract: A direct-current coupling hydrogen production system includes at least one electricity generation system and multiple hydrogen production electrolyzer systems. The electricity generation system includes: a controller, N renewable energy systems, multiple conversion systems and a power switching unit. The power switching unit includes N input ports and M output ports. The controller is configured to control the power switching unit to supply the multiple hydrogen production electrolyzer systems through its output ports with electrical energy received through its input ports, or is configured to control the power switching unit to collect electrical energy received through its input ports and to supply the multiple hydrogen production electrolyzer systems through its output ports respectively corresponding to the hydrogen production electrolyzer systems with the collected electrical energy.
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8.发明申请公开(公告)号：US20220147090A1
公开(公告)日：2022-05-12
申请号：US17519659
申请日：2021-11-05
Applicant: Sungrow Power Supply Co., Ltd.
Abstract: A module level power electronics (MLPE) photovoltaic system and a method for photovoltaic string control are provided. The method is applied to a control unit in the MLPE photovoltaic system. The control unit detects an output current of each photovoltaic string in the MLPE photovoltaic system, and then controls, for photovoltaic strings connected in parallel to a same inverter in the MLPE photovoltaic system, a voltage of a photovoltaic string with larger output current to be reduced, or controls a voltage of a photovoltaic string with smaller output current to be increased, so that backflow current can be reduced to preset range tolerable for MLPE device. The method is from a perspective of the MLPE photovoltaic system, the backflow current is limited by controlling voltage change of associated photovoltaic string without additional hardware cost, effectively protecting MLPE device in the MLPE photovoltaic system.
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公开(公告)号：US12231031B2
公开(公告)日：2025-02-18
申请号：US18010435
申请日：2021-05-21
Applicant: Sungrow Power Supply Co., Ltd.
Inventor： Yue Dong , Jiacai Zhuang , Jun Xu
Abstract: A cascaded power electronic transformer and a method for controlling the same are provided. The method includes: calculating electrical angles θi1 and θkps of an sth transformer and a compensation electrical angle θj of a jth transformer; adding the compensation electrical angle θj to the electrical angle θkps of the jth transformer, to obtain a compensated electrical angle θkps of the jth transformer; and calculating a square wave of a bridge arm voltage of each of the m primary converters and the r secondary converters of the sth transformer based on the electrical angle θi1 and the electrical angle θkps of the sth transformer after compensation.
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公开(公告)号：US20240154424A1
公开(公告)日：2024-05-09
申请号：US18281945
申请日：2021-12-15
Applicant: Sungrow Power Supply Co., Ltd.
Inventor： Yu Yang , Xinyu Wang , Jun Xu , Qiaodi Chen
CPC classification number: H02J3/38 , H02S50/10 , H02J2300/26
Abstract: An MLPE photovoltaic system and an MLPE device detection method thereof. An output end of each MLPE device is connected to a corresponding bus in the MLPE photovoltaic system, and each MLPE device has its own positioning number. The method includes detection operation which is executed at least once, and the detection operation includes: controlling an MLPE device having a corresponding positioning number to perform operation state switching, and acquiring operation characteristics of a corresponding bus before and after switching; determining whether the change of the operation characteristics satisfies a preset change condition; and if not, determining that the state of the MLPE device having the corresponding positioning number is abnormal.
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