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公开(公告)号：US20250070674A1
公开(公告)日：2025-02-27
申请号：US18945433
申请日：2024-11-12
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Tao Luo , Biao Ren , Xiaming Jing
IPC: H02M3/335
Abstract: A solid-state transformer includes a first phase circuit and a low-voltage side auxiliary power supply. The first phase circuit has an input end connected to a single-phase medium-voltage alternating current, and an output end connected to an output end of a low-voltage direct current. The first phase circuit includes N power units. Input ends of the N power units in the first phase circuit are connected in series and are connected to the single-phase medium-voltage alternating current. Output ends the N power units are connected in parallel and are connected to the output end of the low-voltage direct current. The low-voltage side auxiliary power supply is connected to the output end of the low-voltage direct current. First direct currents output from the output ends of the N power units are used to supply power to the low-voltage side auxiliary power supply.
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公开(公告)号：US11888309B2
公开(公告)日：2024-01-30
申请号：US17950792
申请日：2022-09-22
Applicant: Huawei Digital Power Technologies Co., Ltd.
CPC classification number: H02H7/04 , H02H1/0007
Abstract: A fault handling system of a solid-state transformer, including a first power unit and a second power unit that are cascaded and connected is provided. The first power unit includes a first auxiliary supply, a first control module, and a first communication module. The first auxiliary supply and the first control module are both electrically connected to two ends of a first busbar capacitor. The first control module is configured to detect a voltage of the first busbar capacitor. The second power unit includes a second auxiliary supply and a second control module. The second auxiliary supply and the second control module are both electrically connected to two ends of a second busbar capacitor. The first communication module outputs fault information to the second control module when the first control module detects that the voltage of the first busbar capacitor is greater than a threshold.
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公开(公告)号：US20230088540A1
公开(公告)日：2023-03-23
申请号：US17950792
申请日：2022-09-22
Applicant: Huawei Digital Power Technologies Co., Ltd.
Abstract: A fault handling system of a solid-state transformer, including a first power unit and a second power unit that are cascaded and connected is provided. The first power unit includes a first auxiliary supply, a first control module, and a first communication module. The first auxiliary supply and the first control module are both electrically connected to two ends of a first busbar capacitor. The first control module is configured to detect a voltage of the first busbar capacitor. The second power unit includes a second auxiliary supply and a second control module. The second auxiliary supply and the second control module are both electrically connected to two ends of a second busbar capacitor. The first communication module outputs fault information to the second control module when the first control module detects that the voltage of the first busbar capacitor is greater than a threshold.
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公开(公告)号：US20240120729A1
公开(公告)日：2024-04-11
申请号：US18391140
申请日：2023-12-20
Applicant: Huawei Digital Power Technologies Co., Ltd.
CPC classification number: H02H7/04 , H02H1/0007
Abstract: This application provides a fault handling system of a solid-state transformer, including a first power unit and a second power unit that are cascaded and connected. The first power unit includes a first auxiliary supply, a first control module, and a first communication module. The first auxiliary supply and the first control module are both electrically connected to two ends of a first busbar capacitor. The first control module is configured to detect a voltage of the first busbar capacitor. The second power unit includes a second auxiliary supply and a second control module. The second auxiliary supply and the second control module are both electrically connected to two ends of a second busbar capacitor. The first communication module outputs fault information to the second control module when the first control module detects that the voltage of the first busbar capacitor is greater than a threshold.
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