公开(公告)号：US20240136815A1

公开(公告)日：2024-04-25

申请号：US18395643

申请日：2023-12-25

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhangping Shao ,  Kai Xin ,  Congyuan Wang

IPC: H02J3/00 ,  H02J3/01 ,  H02J3/16 ,  H02J3/24

CPC classification number: H02J3/00125 ,  H02J3/0012 ,  H02J3/01 ,  H02J3/16 ,  H02J3/24 ,  H02J2300/24

Abstract: This application provides a power supply system and a conversion method. The power supply system includes a power generation apparatus, a converter circuit, and a drive control circuit. The drive control circuit may be configured to: when a power grid fails, control, based on duration of previous low voltage ride-through, the converter circuit to increase a value of a current to be output to the power grid from a first operating current value to a low voltage ride-through current value, to increase a voltage value at an output end of the converter circuit. Herein, the previous low voltage ride-through is latest low voltage ride-through. In this application, the system can control, based on duration of previous voltage ride-through, a current to be output by the converter circuit to the power grid, to reduce circuit oscillation, with a simple structure, a simple control method, and high safety.

公开(公告)号：US12231058B2

公开(公告)日：2025-02-18

申请号：US18147168

申请日：2022-12-28

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Congyuan Wang ,  Kai Xin ,  Zhangping Shao

IPC: H02M7/48 ,  H02M1/00 ,  H02M1/084 ,  H02M7/483

Abstract: A power conversion apparatus and a control method for a power conversion apparatus to reduce an amplitude of an output voltage of a converter when a grid is recovered from a fault, to ensure device safety. The power conversion apparatus includes a controller and a converter, and the controller is connected to the converter. The controller is configured to: after the output voltage of the converter is less than a first threshold, when the output voltage of the converter rises to be greater than a second threshold, reduce an active current output by the converter to a first current value, and reduce a reactive current output by the converter to a second current value, where the second threshold is greater than the first threshold.