公开(公告)号：US20230071656A1

公开(公告)日：2023-03-09

申请号：US17940191

申请日：2022-09-08

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Yongquan LIU ,  Guilei GU ,  Gang XIAO ,  Dili ZHU

IPC: H02H7/122 ,  H02S40/32

Abstract: A photovoltaic system, an inverter, and a direct current electric arc detection method. The system includes an inverter, a controller, and at least two converters. When detecting an electric arc, the controller controls an input current of the inverter to decrease to extinguish the arc. After the arc is extinguished, the controller controls an output voltage of at least one photovoltaic string to decrease to a first preset voltage, where the first preset voltage is less than an input voltage of the inverter when the electric arc is detected, or controls a maximum value of an output current of the at least one photovoltaic string to be a second preset current, where the second preset current is less than the input current of the inverter when the electric arc is detected. In the foregoing two recovery manners, no electric arc recurs.