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.

公开(公告)号：US20240213783A1

公开(公告)日：2024-06-27

申请号：US18393156

申请日：2023-12-21

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Mingxuan Dong ,  Shuo Wang ,  Jie Chen ,  Wenchao Li ,  Mingquan Zhao ,  Kai Xin

IPC: H02J3/38 ,  H02J3/32 ,  H02J3/46

CPC classification number: H02J3/381 ,  H02J3/32 ,  H02J3/46 ,  H02J2300/24

Abstract: This application provides an inverter, a power grid power supply system, and a method for controlling an excitation inrush current. The controller adjusts the output voltage of the conversion circuit based on a first phase that is of the output voltage of the conversion circuit and that is during reduction of the output voltage, the magnetic flux of the iron core in the transformer, an output voltage that is of the conversion circuit and that is after the output voltage is reduced, and the target voltage value, so as to increase the output voltage of the conversion circuit and keep the magnetic flux of the iron core less than the saturation magnetic flux.