US 12,470,128 B2
Power convertor control method, control apparatus, and computer storage medium
Mingquan Zhao, Shanghai (CN); Kai Xin, Shanghai (CN); and Peng Dong, Shanghai (CN)
Assigned to Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed by HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed on Feb. 28, 2024, as Appl. No. 18/589,857.
Application 18/589,857 is a continuation of application No. PCT/CN2022/113376, filed on Aug. 18, 2022.
Claims priority of application No. 202111010964.0 (CN), filed on Aug. 31, 2021.
Prior Publication US 2024/0204654 A1, Jun. 20, 2024
Int. Cl. H02M 1/32 (2007.01); H02J 3/16 (2006.01); H02M 1/00 (2006.01); H02M 1/44 (2007.01); H02M 7/44 (2006.01)
CPC H02M 1/322 (2021.05) [H02J 3/16 (2013.01); H02M 1/0009 (2021.05); H02M 1/0043 (2021.05); H02M 1/44 (2013.01); H02M 7/44 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A power converter control method, comprising:
determining a phase angle difference between a phase angle of a voltage output by a power converter and a phase angle of a power grid voltage, wherein the power converter is connected to a filter circuit, the filter circuit is connected to a power grid, wherein the power grid voltage is a voltage between the filter circuit and the power grid, and the voltage output by the power converter is a voltage between the filter circuit and the power converter; and
when the phase angle difference is greater than or equal to a first angle threshold, wherein the first angle threshold indicates a minimum value of the phase angle difference occurring when a phase jump occurs in the power grid, performing the following process:
setting a d-axis current reference value and a q-axis current reference value that are used to determine a modulation voltage of the power converter to preset fixed values;
calculating a first modulation voltage of the power converter based on the d-axis current reference value, the q-axis current reference value, and a power grid current, wherein the first modulation voltage is used to determine a total modulation voltage of the power converter, the total modulation voltage is used to generate a control signal of the power converter, and the control signal is used to drive the power converter to output the total modulation voltage;
calculating a compensation voltage of the power converter based on a preset virtual resistance parameter and the power grid current, wherein the compensation voltage is used to compensate the first modulation voltage when the total modulation voltage of the power converter is determined, and the power grid current is a current between the filter circuit and the power grid; and
using a sum of the first modulation voltage and the compensation voltage as the total modulation voltage, wherein a difference between the total modulation voltage and the power grid voltage is less than a difference between the voltage output by the power converter and the power grid voltage.