Patents by Inventor Huixin LI

Huixin LI 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).

  • Current differential protection method for self-adaptive half-wavelength line based on time-difference method
    Patent number: 10985547
    Abstract: A current differential protection method for a self-adaptive half-wavelength line based on a time-difference method. Since an electrical distance of half-wavelength power transmission is long, after a fault occurs, there is an obvious time difference between the actuation times for protecting starting elements at two sides of a line. According to the principles of wave propagation, the position of a fault point can be determined by means of a difference between the actuation times for protecting the starting elements at the two sides of the line. By means of taking the fault point as a differential point, a current value at the differential point can be obtained according to a long line equation by means of the voltage and current at protection-mounted positions at the two sides of the line, and a differential current is then calculated.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: April 20, 2021
    Assignees: CHINA ELECTRIC POWER RESEARCH INSTITUTE COMPANY LIMITED, STATE GRID CORPORATION OF CHINA, CENTRAL CHINA BRANCH OF STATE GRID CORPORATION OF CHINA
    Inventors: Xuming Liang, Yarong Guo, Huanzhang Liu, Xiao Li, Zexin Zhou, Dingxiang Du, Delin Wang, Jing Li, Huixin Li, Zhongqing Li
  • CURRENT DIFFERENTIAL PROTECTION METHOD FOR SELF-ADAPTIVE HALF-WAVELENGTH LINE BASED ON TIME-DIFFERENCE METHOD
    Publication number: 20180375322
    Abstract: A current differential protection method for a self-adaptive half-wavelength line based on a time-difference method. Since an electrical distance of half-wavelength power transmission is long, after a fault occurs, there is an obvious time difference between the actuation times for protecting starting elements at two sides of a line. According to the principles of wave propagation, the position of a fault point can be determined by means of a difference between the actuation times for protecting the starting elements at the two sides of the line. By means of taking the fault point as a differential point, a current value at the differential point can be obtained according to a long line equation by means of the voltage and current at protection-mounted positions at the two sides of the line, and a differential current is then calculated.
    Type: Application
    Filed: July 11, 2016
    Publication date: December 27, 2018
    Inventors: Xuming LIANG, Yarong GUO, Huanzhang LIU, Xiao LI, Zexin ZHOU, Dingxiang DU, Delin WANG, Jing LI, Huixin LI, Zhongqing LI