公开(公告)号：US20240186799A1

公开(公告)日：2024-06-06

申请号：US18428259

申请日：2024-01-31

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Biao REN ,  Zhuyong HUANG

IPC: H02J4/00

CPC classification number: H02J4/00

Abstract: A power unit and a solid-state transformer supply power to a control module in the power unit by using a first subsidiary power supply circuit and a second subsidiary power supply circuit and improve operation reliability of the power unit. The power unit may include the first subsidiary power supply circuit and a first power circuit. The first power circuit includes an alternating current/alternating current power main circuit and a first control module. The alternating current/alternating current power main circuit is coupled to a grid power supply system to supply power to the alternating current/alternating current power main circuit through the grid power supply system. An input end of the first subsidiary power supply circuit is coupled to a bus of the alternating current/alternating current power main circuit. An output end of the first subsidiary power supply circuit is coupled to the first control module.

公开(公告)号：US20230369959A1

公开(公告)日：2023-11-16

申请号：US18227606

申请日：2023-07-28

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhou SHU ,  Biao REN

IPC: H02M1/00 ,  H02M1/08 ,  H02M7/06 ,  H02J3/12 ,  H02M3/158 ,  H02M3/06

CPC classification number: H02M1/007 ,  H02M1/08 ,  H02M7/06 ,  H02J3/12 ,  H02M3/158 ,  H02M3/06 ,  H02J2310/48

Abstract: This application provides a solid-state transformer and a bus voltage equalization method for a solid-state transformer. The solid-state transformer may include a plurality of cascaded modules and a bus voltage equalization module. Input terminals of all the cascaded modules are connected in series, and output terminals of all the cascaded modules are connected in parallel, and are used as a parallel output terminal of the solid-state transformer. The bus voltage equalization module is connected in parallel to the parallel output terminal of the solid-state transformer. Each cascaded module may include a bus capacitor (for example, all capacitors connected in series to each other on a direct current bus.