公开(公告)号：US20240022074A1

公开(公告)日：2024-01-18

申请号：US18475677

申请日：2023-09-27

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Shuchao Wang ,  Xinyu Yu

IPC: H02J3/16

CPC classification number: H02J3/16

Abstract: A grid-tied power supply system includes a controller and at least two inverters. One inverter is coupled to a plurality of power supply modules. The controller is configured to determine a power parameter. The inverter receives a power control packet through a communication transmission medium, determines target power based on the power parameter carried in the power control packet, and determines, based on the power control packet and/or the communication transmission medium, a target adjustment manner corresponding to the power control packet from at least two adjustment manners. The inverter further adjusts, to the target power in the target adjustment manner, power to be output by the inverter to an alternating-current (AC) power grid. The inverter can directly adjust power to be output by the grid-tied power supply system to the alternating-current power grid.

公开(公告)号：US20250023490A1

公开(公告)日：2025-01-16

申请号：US18893048

申请日：2024-09-23

Applicant: Huawei Digital Power Technologies co., Ltd.

Inventor： Qilei CHEN ,  Zhangping Shao ,  Xinyu Yu ,  Kai Xin

IPC: H02M7/539 ,  H02J3/38 ,  H02M1/32

Abstract: A power supply system, a three-phase inverter, and a controller and a control method for a three-phase inverter. In the power supply system, after a low-voltage failure occurs in a power grid, a three-phase inverter outputs a first positive-sequence reactive current to the power grid through low voltage ride-through. When a voltage of at least one of three alternating currents output by the three-phase inverter is greater than a preset threshold, the three-phase inverter outputs a small second positive-sequence reactive current to the power grid through the three alternating currents, to reduce a voltage at an output end of the three-phase inverter and improve stability of the entire power supply system.

公开(公告)号：US12160106B2

公开(公告)日：2024-12-03

申请号：US17964121

申请日：2022-10-12

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Xinyu Yu ,  Yuan Yao ,  Fuqiang Xu ,  Kai Xin

IPC: H02J3/16 ,  H02J3/46 ,  H02M7/49 ,  H02M7/493

Abstract: A power supply system, a converter, and a circulating current suppression method of the converter. The power supply system includes at least two converters that are coupled between a direct current power supply and an alternating current grid. Each converter obtains target output reactive power when an output current of the converter starts to increase from an initial current, obtains a reactive power compensation parameter based on the three-phase output voltages. Further, each converter obtains compensated output reactive power of the converter based on the reactive power compensation parameter and adjusts actual output reactive power of the converter based on the target output reactive power and the compensated output reactive power, so that an absolute value of a difference between common-mode output voltages of any two of the at least two adjusted converters is less than a difference threshold.

公开(公告)号：US12009783B2

公开(公告)日：2024-06-11

申请号：US17473534

申请日：2021-09-13

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Jianqiang Wang ,  Song Wan ,  Yanzhong Zhang ,  Yongbing Gao ,  Xinyu Yu

IPC: H02H7/00 ,  H02H1/00 ,  H02H7/20 ,  H02S50/15

CPC classification number: H02S50/15 ,  H02H1/0007 ,  H02H7/20

Abstract: A fault detection apparatus includes an image capture module and a detection module, and the fault detection apparatus is configured to capturing an image of the photovoltaic module in a light emitting state, and performing fault detection on the photovoltaic module based on the image when a signal-to-noise ratio of the image is maximized, to identify a fault type of the photovoltaic module.

公开(公告)号：US20230421098A1

公开(公告)日：2023-12-28

申请号：US18454211

申请日：2023-08-23

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Xinyu Yu ,  Jianqiang Wang ,  Song Wan ,  Kai Xin

IPC: H02S50/15 ,  H02J3/38

CPC classification number: H02S50/15 ,  H02J2300/26 ,  H02J3/381

Abstract: A photovoltaic cell detection method includes determining a first output power working at a first voltage and a second output power working at a second voltage, where a difference between the first output power and the second output power is less than a power difference threshold, and where both the first output power and the second output power are greater than 0; controlling the photovoltaic cell to work at the first voltage, and obtaining first infrared image information of the photovoltaic cell; and controlling the photovoltaic cell to work at the second voltage, and obtaining second infrared image information of the photovoltaic cell, where both the first infrared image information and the second infrared image information are used to jointly detect whether the photovoltaic cell is faulty.