公开(公告)号：US20230299579A1

公开(公告)日：2023-09-21

申请号：US18324403

申请日：2023-05-26

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhiwu XU ,  Hongmiao FANG ,  Yanzhong ZHANG ,  Changshuan SUN ,  Tiansan LIN

IPC: H02J3/00 ,  H02J13/00

CPC classification number: H02J3/00125 ,  H02J13/00002 ,  H02J13/0004 ,  H02J2300/24

Abstract: A power supply system including three output ends of a power converter respectively connected to a first end of a positive/negative direct current bus and a first end of a neutral bus; two input ends of a first inverter respectively connected to a second end of the positive direct current bus and a second end of the neutral bus; two input ends of a second inverter respectively connected to a second end of the neutral bus and a second end of the negative direct current bus; a controller outputs an overvoltage alarm signal when at least one of the following conditions is met: a to-ground voltage of the positive/ negative direct current bus or a to-ground voltage of the neutral bus is greater than or equal to the preset threshold.