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    Three-level boost circuit and multiple-output parallel system
    1.
    发明授权
    Three-level boost circuit and multiple-output parallel system 有权

    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

    IPC: H02M3/158 ,  H02M3/155 ,  H02M1/32

    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.

    METHOD AND DEVICE FOR PRIMARY FREQUENCY MODULATION IN NEW ENERGY POWER GENERATION
    3.
    发明申请
    METHOD AND DEVICE FOR PRIMARY FREQUENCY MODULATION IN NEW ENERGY POWER GENERATION 有权

    公开(公告)号：US20220158453A1

    公开(公告)日：2022-05-19

    申请号：US17485033

    申请日：2021-09-24

    Applicant: Sungrow Power Supply Co., Ltd.

    Inventor： Tao Jiang ,  Nianan Pan ,  Chao Liu ,  Wei Sun ,  Xianli Zhang

    IPC: H02J3/38 ,  H02J3/48

    Abstract: A method and a device for primary frequency modulation in new energy power generation are provided. An inverter performs a first power adjustment according to a p-f droop curve before receiving a power adjustment instruction sent by the power station controller, and performs a second power adjustment in response to the power adjustment instruction. Since the inverter performs the first power adjustment before responding to the power adjustment instruction sent by the power station controller, the response of the primary frequency modulation is speeded up, so that rapid control for the new energy generation power is achieved, thereby ensuring stable operation of a power grid for new energy power generation.

    PHASE-CHANGE HEAT DISSIPATER AND POWER MODULE
    6.
    发明公开
    PHASE-CHANGE HEAT DISSIPATER AND POWER MODULE 审中-公开

    公开(公告)号：US20230360999A1

    公开(公告)日：2023-11-09

    申请号：US18114443

    申请日：2023-02-27

    Applicant: Sungrow Power Supply Co., Ltd.

    Inventor： Hao Zheng ,  Xiaohu Wang ,  Qiyao Zhu ,  Wentao Shu ,  Ye Yang ,  Nianan Pan ,  Jie Ding

    IPC: H01L23/427

    CPC classification number: H01L23/427 ,  H01L25/072

    Abstract: A phase-change heat dissipater and a power module are provided according to the present application. The phase-change heat dissipater includes least two evaporators, at least one condenser and at least two sets of heat transfer pipelines, the at least two evaporators and at least one condenser form at least two circulating heat dissipation circuits through the at least two sets of heat transfer pipelines, and a phase-change medium is filled in the at least two circulating heat dissipation circuits; and the at least two evaporators are arranged sequentially along a vertical direction. The technical solution of the present application can improve the temperature difference of the at least two evaporators and maintain the temperature uniformity of the at least two evaporators.

    Method, device and system for protecting parallel-connected topology units
    7.
    发明授权
    Method, device and system for protecting parallel-connected topology units 有权

    公开(公告)号：US11387643B2

    公开(公告)日：2022-07-12

    申请号：US16959982

    申请日：2019-12-31

    Applicant: SUNGROW POWER SUPPLY CO., LTD.

    Inventor： Cheng Liang ,  Nianan Pan ,  Zhicheng Wang ,  Lin Cheng ,  Longlin Sun ,  Jigui Feng

    IPC: H02H7/122

    Abstract: A method, a device, and a system for protecting parallel-connected topology units are provided. A target signal transmitted via the signal synchronization line is obtained, and the target signal is sent to other controllers based on a type of the target signal. If the target signal is a carrier synchronization signal, the current power module is controlled to perform carrier synchronization and to be in a working mode. If the target signal is a power module fault signal, the current power module is controlled to be in a shutdown mode. The signal synchronization lines between the parallel-connected topology units are shared in a time-sharing manner, where the carrier synchronization signal is transmitted if the power module works normally, and the power module fault signal is transmitted if the power module is faulty. The topology units monitor the transmitted target signal in real time for fast synchronous protection.

    Multi-channel grid-connected power generation system and control method therefor
    10.
    发明授权
    Multi-channel grid-connected power generation system and control method therefor 有权

    公开(公告)号：US12003105B2

    公开(公告)日：2024-06-04

    申请号：US17642113

    申请日：2020-06-11

    Applicant: SUNGROW POWER SUPPLY CO., LTD.

    Inventor： Guohua Xiang ,  Lin Cheng ,  Jie Ding ,  Nianan Pan

    IPC: H02J3/10 ,  H02J3/38 ,  H02J13/00

    CPC classification number: H02J3/10 ,  H02J3/381 ,  H02J13/00002

    Abstract: The present application discloses a multi-channel grid-connected power generation system and a control method therefor, which lowers the system cost while reducing no-load losses of all step-up transformers. Multi-channel energy conversion devices in the system are each connected in parallel, by means of a step-up transformer, to the same collector line, one end of the collector line is connected to the grid by means of a switch device, and the on-off switching of the switch device is controlled by a control unit. The control unit sends a switch-off command to the switch device when same has determined that all of the energy conversion devices have entered a non-operating state. In the off state of the switch device, at least one energy conversion device, when meeting a start-up condition, starts to operate as a voltage source, and establishes an alternating-current voltage, so that the phase difference and amplitude difference of voltages at two ends of the switch device are both stable within an allowable error range. Then, the control unit sends a switch-on command to the switch device, and the other energy conversion devices start to operate as a current source to transfer energy to the grid.

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