公开(公告)号：US12224682B2

公开(公告)日：2025-02-11

申请号：US18154277

申请日：2023-01-13

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Xinyu Yu ,  Kai Xin ,  Peng Dong ,  Junjie Li

IPC: H02M7/538 ,  H02M1/12 ,  H02M7/5387 ,  H02M7/5395

Abstract: A common-mode voltage injection control method and apparatus for an inverter. For the method and apparatus, a common-mode voltage for a DPWM mode is calculated based on three-phase port voltages and an output power command; a common-mode voltage for an MPC modulation mode is calculated based on the direct current bus voltage, the three-phase port voltages, and the output power command; a modulation proportion is determined based on a maximum phase voltage peak value of the three-phase port voltages, the direct current bus voltage, and a power factor of the output power command; and a common-mode injection voltage is generated based on the common-mode voltage for the DPWM mode, the modulation proportion, and the common-mode voltage for the MPC modulation mode.

公开(公告)号：US20240106244A1

公开(公告)日：2024-03-28

申请号：US18526340

申请日：2023-12-01

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Xinyu Yu ,  Peng Dong ,  Kai Xin

IPC: H02J3/40 ,  H02J3/38 ,  H02M7/493

CPC classification number: H02J3/40 ,  H02J3/381 ,  H02M7/493 ,  H02J2300/24

Abstract: This application discloses a photovoltaic system and a carrier wave signal synchronization method. The photovoltaic system includes a plurality of inverters and a controller. Each inverter in the photovoltaic system inverts a direct current into an alternating current based on a received carrier wave signal, and transmits the alternating current to a power grid. The controller obtains first output currents of the plurality of inverters in an adjustment period, so that the controller can obtain first output current valid values of the plurality of inverters based on the first output currents of the plurality of inverters.