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.