Patents by Inventor Yongjian Tao

Yongjian Tao 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).

  • Method of differential protection in the power distribution networks based on phase difference principles
    Patent number: 10082816
    Abstract: The invention relates to a method of differential protection in the power distribution networks based on phase difference principles. The method comprises the following steps: collecting the current and voltage signals of each loading switch; calculating phase difference between the corresponding currents at two adjacent loading switches, wherein at least one of the two adjacent loading switches accords with ?I? max>n·?IT+?Idz; tripping the two adjacent loading switches if the phase difference corresponding to the two adjacent loading switches being greater than a threshold then a section between the two adjacent loading switches being determined as a fault section. The method only needs to calculate the phase difference between the corresponding currents at the two adjacent loading switches, and achieves the fault determination according to the phase difference being greater than the threshold.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: September 25, 2018
    Assignees: XJ GROUP CORPORATION, XJ ELECTRIC CO., LTD, XUCHANG XJ SOFTWARE TECHNOLOGIES LTD, JIANGSU ELECTRIC POWER COMPANY RESEARCH INSTITUTE, STATE GRID CORPORATION OF CHINA
    Inventors: Qiang Niu, Jingwan Liang, Shuai Jiang, Junhong Qiu, Huawei Jia, Meng Li, Lei Gao, Yongjian Tao, Yongxin Liu, Feng Li, Xintao Dong, Yake Xi
  • METHOD OF DIFFERENTIAL PROTECTION IN THE POWER DISTRIBUTION NETWORKS BASED ON PHASE DIFFERENCE PRINCIPLES
    Publication number: 20170038785
    Abstract: The invention relates to a method of differential protection in the power distribution networks based on phase difference principles. The method comprises the following steps: collecting the current and voltage signals of each loading switch; calculating phase difference between the corresponding currents at two adjacent loading switches, wherein at least one of the two adjacent loading switches accords with ?I?max>n·?IT+?Idz; tripping the two adjacent loading switches if the phase difference corresponding to the two adjacent loading switches being greater than a threshold then a section between the two adjacent loading switches being determined as a fault section. The method only needs to calculate the phase difference between the corresponding currents at the two adjacent loading switches, and achieves the fault determination according to the phase difference being greater than the threshold.
    Type: Application
    Filed: March 21, 2016
    Publication date: February 9, 2017
    Inventors: Qiang Niu, Jingwan Liang, Shuai Jiang, Junhong Qiu, Huawei Jia, Meng Li, Lei Gao, Yongjian Tao, Yongxin Liu, Feng Li, Xintao Dong, Yake Xi