Patents by Inventor Zhaoxin WEN

Zhaoxin WEN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Control method and apparatus for high-voltage, direct current first commutation failure in alternating-current fault
    Patent number: 12283821
    Abstract: A method, an apparatus and a device for suppressing a first HVDC commutation failure under an AC system fault are provided. The method includes: obtaining a three-phase voltage of a converter bus, and calculating a zero-sequence component amplitude and an ?? component amplitude; calculating a first trigger-angle command for a single-phase fault and a second trigger-angle command for a three-phase fault; selecting a smaller one of the first trigger angle command and the second trigger angle command as a trigger-angle command for an extinction-angle controller; and adjusting a trigger angle of the HVDC transmission system by using the trigger-angle command as an upper limit value for an output of the extinction-angle controller of the HVDC transmission system.
    Type: Grant
    Filed: September 13, 2021
    Date of Patent: April 22, 2025
    Assignees: ELECTRIC POWER RESEARCH INSTITUTE. CHINA SOUTHERN POWER GRID, CHINA SOUTHERN POWER GRID
    Inventors: Chuang Fu, Ruina Zheng, Juanjuan Wang, Zhaoxin Wen, Huan Li, Wei Wei
  • CONTROL METHOD AND APPARATUS FOR HIGH-VOLTAGE, DIRECT CURRENT FIRST COMMUTATION FAILURE IN ALTERNATING-CURRENT FAULT
    Publication number: 20240162714
    Abstract: A method, an apparatus and a device for suppressing a first HVDC commutation failure under an AC system fault are provided. The method includes: obtaining a three-phase voltage of a converter bus, and calculating a zero-sequence component amplitude and an ?? component amplitude; calculating a first trigger-angle command for a single-phase fault and a second trigger-angle command for a three-phase fault selecting a smaller one of the first trigger angle command and the second trigger angle command as a trigger-angle command for an extinction-angle controller; and adjusting a trigger angle of the HVDC transmission system by using the trigger-angle command as an upper limit value for an output of the extinction-angle controller of the HVDC transmission system.
    Type: Application
    Filed: September 13, 2021
    Publication date: May 16, 2024
    Applicants: ELECTRIC POWER RESEARCH INSTITUTE. CHINA SOUTHERN POWER GRID, CHINA SOUTHERN POWER GRID
    Inventors: Chuang FU, Ruina ZHENG, Juanjuan WANG, Zhaoxin WEN, Huan LI, Wei WEI