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公开(公告)号：US20220069769A1
公开(公告)日：2022-03-03
申请号：US17404007
申请日：2021-08-17
Applicant: Sungrow Power Supply Co., Ltd.
Inventor： Yanfei Yu , Xiaoxun Li , Anying Jiang , Xinyu Wang
Abstract: A photovoltaic system and a method for locating devices in a photovoltaic string. A communication host in the photovoltaic system acquires accumulated operation durations of MLPE apparatuses of the photovoltaic string, ranks the accumulated operation durations to obtain a ranking result, and determines a physical location of each device in the photovoltaic string according to the ranking result and a sequence of installing positions of the devices, where the devices are installed at the installing positions based on the sequence. It is not necessary to paste label codes on the MLPE apparatuses, or record serial numbers of the MLPE apparatuses by installation personnel. Operation processes are simplified, operation time is saved, and labor costs are reduced.
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公开(公告)号：US20220029582A1
公开(公告)日：2022-01-27
申请号：US17380418
申请日：2021-07-20
Applicant: Sungrow Power Supply Co., Ltd.
Inventor： Xinyu Wang , Anying Jiang , Shun Ding , Yanfei Yu , Xiaoxun Li
Abstract: A photovoltaic inverter, a photovoltaic system, and a method for controlling discharging are provided. The photovoltaic inverter includes a first DCDC converter, an inverter circuit, a first discharging circuit, and a controller. A port capacitor is connected between a positive input end and a negative input end of the first DCDC converter. The port capacitor includes an X capacitor and a first group of Y capacitors. The first discharging circuit is connected between a common terminal of the first group of Y capacitors and a direct current bus, where the common terminal of the first group of Y capacitors is grounded. The controller is configured to control, when receiving a rapid shutdown instruction, the first discharging circuit to operate. The first discharging circuit is configured to discharge electrical energy of the port capacitor.
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公开(公告)号：US10978964B2
公开(公告)日：2021-04-13
申请号：US16239160
申请日：2019-01-03
Applicant: SUNGROW POWER SUPPLY CO., LTD.
Inventor： Xinyu Wang , Tao Zhao , Jiacai Zhuang , Jun Xu , Yilei Gu
Abstract: A medium and high voltage energy conversion system is provided. An input terminal of each of high-voltage isolated DC/DC converters in a phase circuit of the system is connected to a common DC bus. Each of the high-voltage isolated DC/DC converters converts, based on an open-loop control strategy or a closed-loop control strategy, a DC input voltage of a cascade module connected to the high-voltage isolated DC/DC converter into an instruction value related to a voltage of the common DC bus. A system controller of the system calculates, based on at least a voltage-current double loop control strategy, a three-phase modulation instruction to be sent to the cascade modules in three phases according to a parameter related to the voltage of the common DC bus, to implement grid-connected control on three phase circuits.
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14.发明授权公开(公告)号：US10903657B2
公开(公告)日：2021-01-26
申请号：US16114404
申请日：2018-08-28
Applicant: SUNGROW POWER SUPPLY CO., LTD.
Inventor： Cai Jiang , Xinyu Wang , Jun Xu
Abstract: A method for controlling an alternating current cascade photovoltaic power generation system is provided, which includes: acquiring, by a master controller, a current total output power of the system; determining, by the master controller, whether the total power value is greater than a preset power value; generating, by the master controller, a first control signal if the total power value is greater than the preset power value; generating, by the master controller, a second control signal if the total power value is smaller than or equal to the preset power value; receiving, by the slave controller, the first or second control signal generated by the master controller; and controlling, by the slave controller based on the first control signal, a cascade unit to independently perform an MPPT operation, or controlling, by the slave controller based on the second control signal, the cascade unit to output power.
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Patent Agency Ranking
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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公开(公告)号：US20220069586A1
公开(公告)日：2022-03-03
申请号：US17404181
申请日：2021-08-17
Applicant: Sungrow Power Supply Co., Ltd.
Inventor： Yanfei Yu , Anying Jiang , Xinyu Wang , Xiaoxun Li
Abstract: A photovoltaic system, a method for locating devices in a photovoltaic string, a MLPE apparatus, and a method for ranking MLPE apparatuses. Each MLPE apparatus sends, actively according to a predetermine rule, an initial message to the other MLPE apparatuses. The initial message includes a serial number corresponding to said MLPE apparatus and an accumulated operation duration of said MLPE apparatus. The MLPE apparatuses determine the rank of the accumulated operation duration of each MLPE apparatus according to the initial messages sent from all MLPE apparatuses. After each MLPE apparatus communicates with a communication host, the MLPE apparatuses reports the rank of the accumulated operation duration of each MLPE apparatus to the communication host. Thereby, the communication host may determine a physical location of each device in the photovoltaic string according to the ranks of the accumulated operation durations and a sequence of installing positions of the devices in the photovoltaic string.
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公开(公告)号：US10938208B2
公开(公告)日：2021-03-02
申请号：US16238985
申请日：2019-01-03
Applicant: SUNGROW POWER SUPPLY CO., LTD.
Inventor： Renxian Cao , Yilei Gu , Jun Xu , Xinyu Wang , Nianan Pan
IPC: H02J3/01 , H02S40/30 , H02S40/32 , H02S40/34 , H02S40/36 , H02J3/38 , H02M7/5387 , H02M7/49 , H02M1/00
Abstract: A medium-high voltage photovoltaic (PV) power generation system is provided. A PV string of the system is insulated from the ground via an insulator of a medium-high voltage withstanding level, so that the PV string is applicable under a high voltage level. The PV strings are connected to cascade modules. An output voltage of series-connected cascade modules is grid-connected to a 10 kV power grid through a three-phase filter, without a power booster transformer or a high-frequency isolated DC/DC converter in a conventional power station, thereby improving the system efficiency.
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公开(公告)号：US10355618B2
公开(公告)日：2019-07-16
申请号：US15950666
申请日：2018-04-11
Applicant: SUNGROW POWER SUPPLY CO., LTD.
Inventor： Jiacai Zhuang , Yuqing Cui , Deyong Zhao , Xiaohui Luo , Chaoxuan Zhang , Jun Xu , Yilei Gu , Xinyu Wang
Abstract: An ANPC inverter, a zero-crossing switching method and a zero-crossing switching apparatus of the ANPC inverter are provided. The method includes: controlling switch states of switch devices in a bridge leg to change according to a preset logic when zero-crossing switching occurs in an output voltage instruction of the bridge leg, so as to prevent overvoltage in the switch device in the bridge leg. The preset logic includes switching among a sequence of switch state combinations. Switch state combinations of the switch devices before and after the zero-crossing switching occurs are defined as the first and second switch state combinations of the sequence. The second to the penultimate switch state combinations are all safe switch state combinations selected in advance, in each of which a maximum voltage borne by the switch devices in the bridge leg is clamped to a safe limit value.
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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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