US 12,231,058 B2
Power conversion apparatus and control method for power conversion apparatus
Congyuan Wang, Shanghai (CN); Kai Xin, Shanghai (CN); and Zhangping Shao, 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. 28, 2022, as Appl. No. 18/147,168.
Claims priority of application No. 202111633195.X (CN), filed on Dec. 29, 2021.
Prior Publication US 2023/0208313 A1, Jun. 29, 2023
Int. Cl. H02M 7/48 (2007.01); H02M 1/00 (2006.01); H02M 1/084 (2006.01); H02M 7/483 (2007.01)
CPC H02M 7/483 (2013.01) [H02M 1/0009 (2021.05); H02M 1/0019 (2021.05); H02M 1/0845 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A power conversion apparatus, comprising:
a controller; and
a converter, wherein the controller is connected to the converter;
the controller is configured to detect an output voltage of the converter;
the controller is configured to: after the output voltage of the converter is less than a first threshold, when the output voltage of the converter rises to be greater than a second threshold, reduce an active current output by the converter to a first current value, and reduce a reactive current output by the converter to a second current value, wherein the second threshold is greater than the first threshold; and
adjust, based on a preset current adjustment rate, the reactive current and the active current that are output by the converter until the active current is adjusted from the first current value to a target active current value and the reactive current is adjusted from the second current value to a target reactive current value, wherein the target reactive current value falls within a reactive current range output when the converter works normally, the target active current value falls within an active current range output when the converter works normally, and the first current value and the second current value are respectively any value less than 50% of the reactive current value range output when the converter works normally and any value less than 50% of the active current value range output when the converter works normally.