公开(公告)号：US20230396057A1

公开(公告)日：2023-12-07

申请号：US18452352

申请日：2023-08-18

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Fangpo Zhang ,  Tiansan Lin ,  Xiufeng Zhang ,  Jinxiang Zhan

IPC: H02H7/20 ,  H02J3/38 ,  H02S40/36 ,  H02S50/10

CPC classification number: H02H7/20 ,  H02J3/381 ,  H02S40/36 ,  H02S50/10 ,  H02J2300/24

Abstract: This application discloses a photovoltaic system, a direct-current combiner box, and a fault isolation method. The photovoltaic system includes a fault isolation circuit and a DC/DC conversion circuit. A first end of the fault isolation circuit is connected to N photovoltaic strings, and a second end of the fault isolation circuit is connected to an input end of the DC/DC conversion circuit. The fault isolation circuit includes a multipole switch, and each group of photovoltaic strings in the N photovoltaic strings is connected to an input end of a power conversion circuit through one pole of switch in the multipole switch. Each group of photovoltaic strings includes at least two photovoltaic strings. When a reverse connection fault occurs in the N photovoltaic strings, the entire multipole switch is turned off in linkage.