公开(公告)号：US20240305099A1

公开(公告)日：2024-09-12

申请号：US18668538

申请日：2024-05-20

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhangping SHAO ,  Kai XIN ,  You ZHOU

IPC: H02J3/18 ,  H02J3/38

CPC classification number: H02J3/1835 ,  H02J3/38 ,  H02J2300/24 ,  H02J2300/28

Abstract: A converter circuit is configured to output a first reactive current to a power grid when a voltage value of an output port of the converter circuit decreases from a first working voltage value to a second working voltage value. The drive control circuit is configured to: in a process in which the converter circuit outputs the first reactive current to the power grid, when it is detected that the voltage value of the output port of the converter circuit increases to a third working voltage value and the third working voltage value is greater than or equal to a first recovery voltage value, control the converter circuit to output a second reactive current to the power grid, to recover the voltage value of the output port of the converter circuit to the first working voltage value.

公开(公告)号：US20230208313A1

公开(公告)日：2023-06-29

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: H02M7/483 ,  H02M1/00 ,  H02M1/084

CPC classification number: H02M7/483 ,  H02M1/0009 ,  H02M1/0845 ,  H02M1/0019

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.