公开(公告)号：US09912146B1

公开(公告)日：2018-03-06

申请号：US15608500

申请日：2017-05-30

Applicant: SUNGROW POWER SUPPLY CO., LTD.

Inventor： Changyou Wang ,  Wei Sun ,  Qun Zheng

IPC: H02J1/02 ,  H02M1/12 ,  H02M1/14 ,  H02M7/521 ,  H02H7/122 ,  H02M7/48 ,  H01L39/14 ,  H02M3/07 ,  H02M7/5383 ,  H02M1/00

CPC classification number: H02H7/122 ,  H01L39/14 ,  H02M1/12 ,  H02M3/07 ,  H02M7/48 ,  H02M7/5383 ,  H02M2001/007 ,  H02M2001/123

Abstract: A method and a device for suppressing a common-mode voltage of an inverter AC cable relative to ground are provided. A control unit generates a control signal according to a voltage of the AC side of the inverter. A switch unit connects or disconnects the discharge unit with ground or reference ground in response to the control signal. A discharge unit discharges the common-mode voltage of the inverter AC cable relative to ground when the switch unit is turned on. Therefore, during maintenance of the inverter when the AC switch is turned off, the common-mode voltage of the AC cable relative to ground can be discharged without using the isolated sampling solution in the conventional technology which has a high implementation cost and has a high requirement on the insulation class of the components, thereby avoiding the risk of electric shock to the maintenance technician.

公开(公告)号：US11784493B2

公开(公告)日：2023-10-10

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

CPC classification number: H02J3/381 ,  H02J3/48 ,  H02J2300/24 ,  H02J2300/28

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.

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.

公开(公告)号：US09923517B1

公开(公告)日：2018-03-20

申请号：US15607115

申请日：2017-05-26

Applicant: Sungrow Power Supply Co., Ltd.

Inventor： Changyou Wang ,  Wei Sun ,  Bijie Li

IPC: H02S50/10 ,  H02J3/38 ,  H02S40/32

CPC classification number: H02S50/10 ,  G05F1/10 ,  H02J3/383 ,  H02S10/00 ,  H02S40/32 ,  Y02E10/563

Abstract: A photovoltaic inverter system and a method, and a PID effect compensation device for the photovoltaic inverter system are provided. A processing control unit records operation conditions of photovoltaic modules, determines whether a PID effect compensation condition is met, calculates a compensation voltage optimally and controls the integrated PID compensation device to perform PID effect compensation on the photovoltaic modules.

公开(公告)号：US20250132575A1

公开(公告)日：2025-04-24

申请号：US18685488

申请日：2022-05-25

Applicant: SUNGROW POWER SUPPLY CO., LTD.

Inventor： Wei Sun ,  Pengju Li ,  Fei Chen ,  Xiaoguang Chen

IPC: H02J7/00 ,  H01M10/42 ,  H01M10/48 ,  H01M50/574 ,  H01M50/581 ,  H01M50/583

Abstract: A battery module, and an energy storage system and a control method therefor. When a corresponding preset condition is satisfied, battery modules can be switched in or out of a system by means of the on-off of a main loop on-off control circuit and a bypass on-off control circuit, so that the battery modules currently connected into the system can be adjusted in real time, and thus the battery modules in the system can satisfy the corresponding preset condition one by one, namely achieving the same state (for example, achieving SOC equalization), without causing energy waste. Moreover, a main loop buffer circuit or a bypass buffer circuit is provided in the battery module, so that energy impact generated when the battery module is switched in or cut out of the system can be absorbed.