公开(公告)号：US11356034B2

公开(公告)日：2022-06-07

申请号：US17088088

申请日：2020-11-03

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Fei Xu ,  Fei Ye ,  Lei Shi

IPC: H02M7/487 ,  G01R19/175 ,  H02M1/38 ,  H02M7/5387 ,  H02M1/00

Abstract: Embodiments of the present application disclose a multi-level inverter clamping modulation method and apparatus, and an inverter. Switching elements of an inverter are controlled when an output voltage of the inverter crosses zero, and switching elements in each inverter bridge arm of an active clamp multi-level inverter include an internal tube, an external tube, and a clamping tube. The internal tube and the external tube are connected in series between a positive bus and a negative bus, the clamping tube is connected between a common terminal of the internal tube and the external tube and a bus, the internal tube is a low-frequency switching element, and the external tube and the clamping tube are high-frequency switching elements.

公开(公告)号：US12272953B2

公开(公告)日：2025-04-08

申请号：US18074172

申请日：2022-12-02

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Fei Xu ,  Yongbing Gao ,  Guoping Fan

IPC: H02J3/32 ,  H02J3/38 ,  H02J3/46 ,  H02M3/158 ,  H02M7/797 ,  H02S40/32

Abstract: This application provides a photovoltaic power generation system. The system includes at least one first photovoltaic module, a photovoltaic inverter, a first two-way DC/DC converter, and at least one first energy storage unit, and further includes at least one second photovoltaic module or at least one second energy storage unit. The photovoltaic inverter includes a DC/DC converter and a DC-AC inverter, where the DC/DC converter is electrically connected to the at least one first photovoltaic module, and the DC/DC converter is connected to the DC-AC inverter through a direct current bus. For the photovoltaic power generation system, photovoltaic arrays and energy storage devices can be configured flexibly to cope with peaks and troughs of power consumption.

公开(公告)号：US11626834B2

公开(公告)日：2023-04-11

申请号：US17553385

申请日：2021-12-16

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Fei Xu ,  Xinyu Yu ,  Kai Xin ,  Jianqiang Wang

IPC: H02S40/32 ,  H02M7/537 ,  H02J3/38

Abstract: A converter and a power backfeed control method applied to a photovoltaic power generation system are provided. The power backfeed control method includes: controlling, according to a backfeed instruction, the converter to enter a backfeed mode, where in the backfeed mode, the converter can transmit energy of the power grid to a selected photovoltaic string with a corresponding number; determining a backfeed control voltage according to the backfeed instruction, and determining a voltage limit in a process of determining the backfeed control voltage; determining an actual backfeed voltage based on the backfeed control voltage and the voltage limit, where the actual backfeed voltage is a smaller one of the backfeed control voltage and the voltage limit; and controlling the converter to output the actual backfeed voltage to the selected photovoltaic string, to enable the selected photovoltaic string to generate an electroluminescent effect.

公开(公告)号：US11539212B2

公开(公告)日：2022-12-27

申请号：US16984418

申请日：2020-08-04

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Fei Xu ,  Yongbing Gao ,  Guoping Fan

IPC: H02J3/32 ,  H02S40/32 ,  H02M3/158 ,  H02M7/797 ,  H02J3/46 ,  H02J3/38

Abstract: This application provides a photovoltaic power generation system. The system includes at least one first photovoltaic module, a photovoltaic inverter, a first two-way DC/DC converter, and at least one first energy storage unit, and further includes at least one second photovoltaic module or at least one second energy storage unit. The photovoltaic inverter includes a DC/DC converter and a DC-AC inverter, where the DC/DC converter is electrically connected to the at least one first photovoltaic module, and the DC/DC converter is connected to the DC-AC inverter through a direct current bus. For the photovoltaic power generation system, photovoltaic arrays and energy storage devices can be configured flexibly to cope with peaks and troughs of power consumption.

公开(公告)号：US11716032B2

公开(公告)日：2023-08-01

申请号：US17729340

申请日：2022-04-26

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Fei Xu ,  Fei Ye ,  Lei Shi

IPC: H02M7/487 ,  G01R19/175 ,  H02M1/38 ,  H02M7/5387 ,  H02M1/00

CPC classification number: H02M7/487 ,  G01R19/175 ,  H02M1/38 ,  H02M7/5387 ,  H02M1/0058 ,  H02M1/385

Abstract: Embodiments of the present application disclose a multi-level inverter clamping modulation method and apparatus, and an inverter. Switching elements of an inverter are controlled when an output voltage of the inverter crosses zero, and switching elements in each inverter bridge arm of an active clamp multi-level inverter include an internal tube, an external tube, and a clamping tube. The internal tube and the external tube are connected in series between a positive bus and a negative bus, the clamping tube is connected between a common terminal of the internal tube and the external tube and a bus, the internal tube is a low-frequency switching element, and the external tube and the clamping tube are high-frequency switching elements.