公开(公告)号：US20250158386A1

公开(公告)日：2025-05-15

申请号：US18917734

申请日：2024-10-16

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Yongbing GAO ,  Xiaoxiang Zhou ,  Junsong Tang ,  Zhuang Sun ,  Wangjie Xie ,  Yong Xu ,  Tao Shi ,  He Zhou

IPC: H02H3/26 ,  H02J3/00

Abstract: A power supply system includes a power conditioning apparatus, a transformer, and a controller. The power conditioning apparatus includes an inverter circuit, at least one grid-connected switch, a voltage-to-ground detector. The inverter circuit is configured to connect to the inverter circuit is configured to connect to the transformer through the at least one grid-connected switch, and the transformer is configured to connect to a power grid. When one grid-connected switch is turned off and turned on, the voltage-to-ground detector detects voltage to grounds of the power conditioning apparatus to obtain a first voltage value and a second voltage value respectively. The controller outputs alarm information for grounding of a neutral wire of the transformer or controls the power conditioning apparatus to stop working when a difference between the second voltage value and the first voltage value falls within a preset voltage range.