US 11,994,893 B2
Converter control method, converter, and photovoltaic power generation system
Guilei Gu, Shanghai (CN); Zhiwu Xu, Shanghai (CN); and Yu Wang, Xi'an (CN)
Assigned to Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed on Mar. 16, 2022, as Appl. No. 17/696,596.
Application 17/696,596 is a continuation of application No. PCT/CN2020/096888, filed on Jun. 18, 2020.
Prior Publication US 2022/0206522 A1, Jun. 30, 2022
Int. Cl. G05F 1/67 (2006.01); H02S 40/32 (2014.01)
CPC G05F 1/67 (2013.01) [H02S 40/32 (2014.12)] 21 Claims
OG exemplary drawing
 
1. A converter control method, used to control an output of a converter, wherein an input end of the converter is connected to at least one photovoltaic module, an output end of the converter is connected to an inverter, the converter is configured to: convert and output energy generated by the at least one photovoltaic module, and the control method comprises:
determining an output power-voltage (PV) curve of the converter based on an output PV curve of the photovoltaic module, wherein the output PV curve of the converter comprises at least a simulated voltage limiting section and a constant power section that are connected, wherein an output voltage for any point corresponding to the simulated voltage limiting section is proportional to an output voltage of the photovoltaic module is in accordance with a proportional coefficient that is constant within the simulated voltage limiting section, and wherein a difference between an output powers for any two points corresponding to the constant power section is less than a first preset threshold; and
controlling a voltage output of the converter based on the output PV curve of the converter.