公开(公告)号：US20250105625A1

公开(公告)日：2025-03-27

申请号：US18887314

申请日：2024-09-17

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Xiongfei WANG ,  Teng Liu ,  Mingquan Zhao ,  Meiqing Zhang ,  Kai Xin ,  Yunfeng Liu

IPC: H02J3/18 ,  H02J3/32 ,  H02M1/00

Abstract: A power converter and a method. When the voltage at the grid connection point exceeds the preset voltage range and an amplitude of a voltage output by the power conversion circuit is not greater than a voltage threshold, embodiments can control the amplitude of the current output by the power conversion circuit to be not greater than a second current threshold, where the second current threshold is greater than the first current threshold, and a ratio of an active current to a reactive current output by the power conversion circuit is constant or changes; or, when the amplitude of the voltage output by the power conversion circuit is greater than the voltage threshold, embodiments can control the amplitude of the current output by the power conversion circuit to be equal to the second current threshold, where the ratio of the active current to the reactive current changes.

公开(公告)号：US20250158413A1

公开(公告)日：2025-05-15

申请号：US18945940

申请日：2024-11-13

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zisen QU ,  Mingquan Zhao ,  Meiqing Zhang ,  Kai Xin ,  Yunfeng Liu

IPC: H02J3/38 ,  H02J3/24 ,  H02M1/00

Abstract: A power conversion system including N power conversion units and a control unit, which can control, in a control periodicity, operating modes of one or more target power conversion units in the N power conversion units to be switched between a PR mode and an MPPT mode, and update a reference power based on a maximum power obtained in the MPPT mode, for an operating power of the target power conversion unit obtained in the PR mode to be an updated reference power, and the updated reference power is less than or equal to the maximum power. In addition, the control unit further controls an operating mode of a power conversion unit other than the target power conversion unit in the N power conversion units to remain unchanged, so that the power conversion unit other than the target power conversion unit does not perform mode switching.

公开(公告)号：US20250158534A1

公开(公告)日：2025-05-15

申请号：US18945929

申请日：2024-11-13

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zisen Qu ,  Mingquan Zhao ,  Meiqing Zhang ,  Kai Xin ,  Yunfeng Liu

IPC: H02M5/458 ,  H02J3/38 ,  H02M1/00

Abstract: A power conversion system which includes N power conversion units and a control unit. The control unit selects a target power conversion unit and a coordinated power conversion unit in a control periodicity, controls an operating mode of the target power conversion unit to be sequentially switched between a PR mode and a MPPT mode, and updates a reference power based on a maximum power obtained in the MPPT mode, for an operating power of the target power conversion unit in the PR mode to be an updated reference power, and the updated reference power is less than or equal to the maximum power. In addition, the control unit controls an operating power of the coordinated power conversion unit to be coordinately adjusted, for a total variation of operating powers of the N power conversion units to be less than a variation threshold.

公开(公告)号：US20240305096A1

公开(公告)日：2024-09-12

申请号：US18667399

申请日：2024-05-17

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Meiqing Zhang ,  Shuo Wang ,  Mingxuan Dong ,  Kai Xin

IPC: H02J3/00

CPC classification number: H02J3/0012

Abstract: An output end of a power converter is connected to a microgrid bus, and the microgrid bus is connected to an external power grid through a grid-tied switch. When detecting that a power grid fails, the power converter is in a first current source control mode. After a duration of the power grid failure reaches a first duration, the power converter switches from the first current source control mode to a first voltage source control mode. The first current source control mode is a current source failure ride-through control mode. The first voltage source control mode is a voltage source failure ride-through control mode. The first duration is less than a second duration, and the second duration is a time interval between a moment at which the power grid fails and a moment at which the grid-tied switch is turned off.