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.