公开(公告)号：US20230421098A1

公开(公告)日：2023-12-28

申请号：US18454211

申请日：2023-08-23

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Xinyu Yu ,  Jianqiang Wang ,  Song Wan ,  Kai Xin

IPC: H02S50/15 ,  H02J3/38

CPC classification number: H02S50/15 ,  H02J2300/26 ,  H02J3/381

Abstract: A photovoltaic cell detection method includes determining a first output power working at a first voltage and a second output power working at a second voltage, where a difference between the first output power and the second output power is less than a power difference threshold, and where both the first output power and the second output power are greater than 0; controlling the photovoltaic cell to work at the first voltage, and obtaining first infrared image information of the photovoltaic cell; and controlling the photovoltaic cell to work at the second voltage, and obtaining second infrared image information of the photovoltaic cell, where both the first infrared image information and the second infrared image information are used to jointly detect whether the photovoltaic cell is faulty.

公开(公告)号：US20220407456A1

公开(公告)日：2022-12-22

申请号：US17896730

申请日：2022-08-26

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Song Wan ,  Yongbing Gao ,  Xun Wang ,  Yanzhong Zhang ,  Zhipeng Wu

IPC: H02S50/10 ,  H02S40/32

Abstract: A linkage protection system includes an inverter, an anti-potential-induced degradation (PID) apparatus, and an insulation-monitoring apparatus. The anti-PID apparatus is configured to inject a voltage into an input end or an output end of the inverter, to increase or decrease a voltage-to-earth of a photovoltaic system. The insulation-monitoring apparatus is configured to inject an insulation-monitoring voltage into a direct current (DC) side or an alternating current (AC) side of the inverter. The anti-PID apparatus and the insulation-monitoring apparatus directly or indirectly communicate with each other, to learn of information about whether a peer apparatus is operating, and perform linkage control. The anti-PID apparatus and the insulation-monitoring apparatus operate in different time periods.