US 12,348,047 B2
Photovoltaic system and carrier wave signal synchronization method
Xinyu Yu, Shanghai (CN); Peng Dong, Shanghai (CN); and Kai Xin, Shanghai (CN)
Assigned to HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed on Dec. 1, 2023, as Appl. No. 18/526,340.
Application 18/526,340 is a continuation of application No. PCT/CN2021/098426, filed on Jun. 4, 2021.
Prior Publication US 2024/0106244 A1, Mar. 28, 2024
Int. Cl. H02J 3/40 (2006.01); H02J 3/38 (2006.01); H02M 7/493 (2007.01)
CPC H02J 3/40 (2013.01) [H02J 3/381 (2013.01); H02M 7/493 (2013.01); H02J 2300/24 (2020.01)] 19 Claims
OG exemplary drawing
 
1. A system, comprising:
a plurality of inverters each configured to: invert a direct current into an alternating current based on a received carrier wave signal, and transmit the alternating current to a power grid; and
a controller configured to:
obtain first output currents of the plurality of inverters in an adjustment period, wherein a respective first output current of each inverter of the plurality of inverters is obtained by sampling an output current of a respective inverter at a specified sampling frequency that is greater than a frequency of a carrier wave signal of the respective inverter;
obtain first output current valid values of the plurality of inverters based on the first output currents of the plurality of inverters; and
adjust a phase of a target carrier wave signal of a first target inverter, wherein the first target inverter is an inverter with a largest first output current valid value of the plurality of inverters.