US 12,456,869 B2
Photovoltaic power generation system, photovoltaic inverter, and IV curve scanning method
Xinyu Yu, Shanghai (CN); Kai Xin, Shanghai (CN); Jianqiang Wang, Shanghai (CN); and Song Wan, Shanghai (CN)
Assigned to Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed on May 12, 2023, as Appl. No. 18/316,387.
Application 18/316,387 is a continuation of application No. PCT/CN2021/112451, filed on Aug. 13, 2021.
Claims priority of application No. 202011271440.2 (CN), filed on Nov. 13, 2020.
Prior Publication US 2023/0291208 A1, Sep. 14, 2023
Int. Cl. H02J 3/46 (2006.01); H02J 3/00 (2006.01); H02S 50/10 (2014.01)
CPC H02J 3/46 (2013.01) [H02J 3/0012 (2020.01); H02S 50/10 (2014.12); H02J 2300/26 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A photovoltaic power generation system, wherein the photovoltaic power generation system comprises a controller and M groups of DC-DC circuits, each group of DC-DC circuits comprise N DC-DC circuits, M is a positive integer, and N is an integer greater than 1;
an input end of each DC-DC circuit is configured to connect to at least one photovoltaic unit, and each photovoltaic unit comprises at least one photovoltaic module; and
the controller is configured to:
control the N DC-DC circuits in each group of DC-DC circuits to sequentially start online IV curve scanning, and
control a time interval at which two adjacent DC-DC circuits start online IV curve scanning to be less than duration of online IV curve scanning performed by one DC-DC circuit.