公开(公告)号：US20220206522A1

公开(公告)日：2022-06-30

申请号：US17696596

申请日：2022-03-16

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Guilei GU ,  Zhiwu WU ,  Yu WANG

IPC: G05F1/67 ,  H02S40/32

Abstract: This application relates to a converter in a photovoltaic power generation system and a converter control method. An input end of the converter is connected to at least one photovoltaic module, and an output end is connected to an inverter. The control method includes: determining an output power-voltage (PV) curve of a converter based on an output PV curve of the photovoltaic module; and controlling a voltage output of the converter based on the output PV curve of the converter. The output PV curve includes at least a simulated voltage limiting section and a constant power section that are connected. In this application, an existing MPPT control policy of the inverter can be adapted when a voltage-limited output is implemented, to avoid a case in which a power of a photovoltaic string drops to zero.