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公开(公告)号：US20240113638A1
公开(公告)日：2024-04-04
申请号：US18350035
申请日：2023-07-11
Applicant: Sungrow Power Supply Co., Ltd.
Inventor： Lu Zhang , Hao Wang , Yu Gu , Linhai Zhao , Qiaodi Chen
Abstract: A single-stage multi-path direct current access converter and a control method thereof are provided. The single-stage multi-path direct current access converter includes an AC-side conversion circuit; at least two DC-side conversion circuits; and transformers corresponding to the at least two DC-side conversion circuits. AC sides of the at least two DC-side conversion circuits are respectively connected to primary windings of the corresponding transformers; secondary windings of the transformers are connected in parallel to a first side of the AC-side conversion circuit; each of the at least two DC-side conversion circuits is configured to invert DC power received by the DC-side conversion circuit, or to rectify AC power received by the DC-side conversion circuit; and the AC-side conversion circuit is configured to perform AC frequency conversion.
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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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公开(公告)号：US12003109B2
公开(公告)日：2024-06-04
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
CPC classification number: H02J3/381 , H02J2300/24 , H02J2300/28
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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公开(公告)号：US20240128890A1
公开(公告)日：2024-04-18
申请号：US18484261
申请日：2023-10-10
Applicant: Sungrow Power Supply Co., Ltd.
Inventor： Lu Zhang , Yu Gu , Linhai Zhao , Qiaodi Chen
IPC: H02M7/5387 , H02M1/00 , H02M3/335 , H02M7/797
CPC classification number: H02M7/5387 , H02M1/0083 , H02M3/33573 , H02M3/33584 , H02M7/797
Abstract: A micro inverter having a plurality of independent inputs and a photovoltaic system are provided. The micro inverter includes multiple isolated DC-DC converters and a DC-AC converter. Each isolated DC-DC converter of the isolated DC-DC converters includes an inverter H-bridge, a transformer and a voltage-multiplying rectifier. An input terminal of the inverter H-bridges is configured to connect to a direct-current power supply. A secondary winding of the transformer is connected to an input terminal of the voltage-multiplying rectifier. An output terminal of the voltage-multiplying rectifier is connected to an input terminal of the DC-AC converter. A leakage inductor or an external inductor of the transformer forms series resonance along with a capacitor in the voltage-multiplying rectifier.
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公开(公告)号：US10389132B2
公开(公告)日：2019-08-20
申请号：US15474061
申请日：2017-03-30
Applicant: SUNGROW POWER SUPPLY CO., LTD.
Inventor： Renxian Cao , Yilei Gu , Yu Gu , Jun Xu
IPC: H02J7/34 , H02J1/10 , H02J3/38 , H02P7/28 , F21S8/08 , F21S9/03 , H02M3/158 , H02M7/5387 , F21Y115/10 , H02M1/10 , H02M1/12 , H02M7/487 , H02M7/5395 , H02M1/00
Abstract: An AC-DC photovoltaic device is provided, including: a photovoltaic module, a direct current side capacitor, a DC-PWM power switching circuit and a controller. The direct current side capacitor is connected in parallel with an output terminal of the photovoltaic module. An input terminal of the DC-PWM power switching circuit is connected with the output terminal of the photovoltaic module. The DC-PWM power switching circuit includes a controllable switch transistor. The controller is configured to output a switch control signal to control a switching state of the controllable switch transistor in the DC-PWM power switching circuit, to control the DC-PWM power switching circuit to output a direct current PWM wave in a case that the switch control signal is a direct current modulation signal, and output an alternating current PWM wave in a case that the switch control signal is an alternating current modulation signal.
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Patent Agency Ranking
公开(公告)号：US10367355B2
公开(公告)日：2019-07-30
申请号：US15499152
申请日：2017-04-27
Applicant: SUNGROW POWER SUPPLY CO., LTD.
Abstract: A cascaded multi-level inverter system, a modulation method and a controller for the same are provided. The method includes performing a maximum power point tracking control based on a voltage signal and a current signal of each DC source and a voltage signal and a current signal of the power grid obtained by sampling, calculating a first modulation signal for suppressing power imbalance, and outputting the first modulation signal to each inverter unit; and calculating, based on the calculated reactive current instruction value, the calculated active current instruction value, and a current signal of the reactive compensation device obtained by sampling, a second modulation signal for causing an output power factor of the cascaded multi-level inverter system to be 1, and outputting the second modulation signal to the reactive compensation device.
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公开(公告)号：US10574059B2
公开(公告)日：2020-02-25
申请号：US15912005
申请日：2018-03-05
Applicant: SUNGROW POWER SUPPLY CO., LTD.
Inventor： Xinyu Wang , Jun Xu , Yilei Gu , Yu Gu
Abstract: A control apparatus and a combiner box are provided. In a case that component maintenance needs to be performed, an optimizer connected to the combiner box is controlled to operate in a safe mode, and a switch-off signal is outputted to disconnect the combiner box from an inverter if an output current of the combiner box is smaller than a threshold. In a case that the maintenance is completed, the optimizer connected to the combiner box is controlled to operate in a maximum power point tracking mode, and the combiner box is connected to the inverter if an input voltage of the combiner box is greater than an output voltage of the combiner box, that is, if an output voltage of a corresponding string increases gradually to a value exceeding a direct current bus voltage.
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公开(公告)号：US20240195323A1
公开(公告)日：2024-06-13
申请号：US18493898
申请日：2023-10-25
Applicant: Sungrow Power Supply Co., Ltd.
Inventor： Zichen Wang , Yu Gu , Qiaodi Chen , Hao Wang , Baoji Wang
IPC: H02M7/5387 , H02J3/38 , H02M1/00 , H02M3/335
CPC classification number: H02M7/53871 , H02J3/38 , H02M1/0043 , H02M3/33571 , H02J2300/24
Abstract: A micro inverter and a modulation method thereof are provided in the present disclosure. The micro inverter includes a filter, a transformer, and a switching circuit. The switching circuit includes one or more first switching circuit and one second switching circuit. Each of the first switching circuits has an input terminal serving as an output terminal of a direct-current power supply, and is configured to convert a direct current into an alternating current and output the alternating current to the second switching circuit. An output terminal of the second switching circuit is connected to a primary side of the transformer. A secondary side of the transformer is connected to an input terminal of the filter.
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公开(公告)号：US20220064810A1
公开(公告)日：2022-03-03
申请号：US17411439
申请日：2021-08-25
Applicant: Sungrow Power Supply Co., Ltd.
IPC: C25B15/08 , C25B1/04 , C25B15/029
Abstract: A hydrogen production system and a method for controlling the same are provided. A renewable energy power generation system supplies electric energy to a hydrogen production device. The hydrogen production device discharges acceptable-purity hydrogen to the main hydrogen branch and discharges unacceptable-purity hydrogen to the mixed hydrogen branch. The mixed hydrogen branch receives high-purity hydrogen. The mixed hydrogen branch includes two valves to respectively control volumes of the high-purity hydrogen and the unacceptable-purity hydrogen flowing into the hydrogen mixing device in the mixed hydrogen branch, to control mixed hydrogen in the hydrogen mixing device to be the acceptable-purity hydrogen. The acceptable-purity hydrogen in the hydrogen mixing device is discharged to a purification branch in the main hydrogen branch, or a purification branch in the mixed hydrogen branch.
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公开(公告)号：US10298019B1
公开(公告)日：2019-05-21
申请号：US16108872
申请日：2018-08-22
Applicant: SUNGROW POWER SUPPLY CO., LTD.
Inventor： Xinyu Wang , Yanfei Yu , Yu Gu , Jun Xu , Yilei Gu
IPC: H02J3/38 , H02S40/34 , H01L31/042
Abstract: A communication host and a photovoltaic power generation system are provided. The communication host includes an acquiring module, a determining module and a control module. The acquiring module is configured to acquire an operating state parameter of the system. The determining module is configured to determine whether the optimizer meets a first preset triggering condition based on the operating state parameter. In a case where the optimizer meets the first preset triggering condition, a first triggering instruction is transmitted, to instruct the system to decrease, in response to the first triggering instruction, the direct current bus voltage of the grid-connected inverter, and/or a second triggering instruction is transmitted, to instruct the system to increase, in response to the second triggering instruction, an output voltage limiting value of at least one of the optimizers meeting the first preset triggering condition.
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