公开(公告)号：US20240178668A1

公开(公告)日：2024-05-30

申请号：US18522758

申请日：2023-11-29

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Fei XU ,  Xinyu YU ,  Mingquan ZHAO ,  Zisen QU ,  Kai XIN

IPC: H02J3/18 ,  H02M7/44

CPC classification number: H02J3/18 ,  H02M7/44

Abstract: An inverter and a control method for the inverter. The inverter includes a direct current conversion circuit, a direct current bus, an inverter circuit, and a controller. An input end of the direct current conversion circuit is connected to an input end of the inverter, an output end of the direct current conversion circuit is connected to an input end of the inverter circuit through the direct current bus, and an output end of the inverter circuit is connected to an output end of the inverter. The controller obtains a reactive voltage control amount based on actual output active power and reference output active power of the inverter circuit and adjusts an output voltage of the inverter circuit based on the reactive voltage control amount and a reference output voltage.

公开(公告)号：US20240204654A1

公开(公告)日：2024-06-20

申请号：US18589857

申请日：2024-02-28

Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.

Inventor： Mingquan ZHAO ,  Kai XIN ,  Peng DONG

IPC: H02M1/32 ,  H02J3/16 ,  H02M1/00 ,  H02M1/44 ,  H02M7/44

CPC classification number: H02M1/322 ,  H02J3/16 ,  H02M1/0009 ,  H02M1/0043 ,  H02M1/44 ,  H02M7/44

Abstract: A power converter control method includes: determining a phase angle difference between a phase angle of a voltage output by the power converter and a phase angle of a power grid voltage; and if the phase angle difference is greater than or equal to a first angle threshold, 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; calculating a compensation voltage of the power converter based on a preset virtual resistance parameter and the power grid current; and using a sum of the first modulation voltage and the compensation voltage as a total modulation voltage.