Patents by Inventor Jiansong Zhao

Jiansong Zhao 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 for preventing differential protection maloperation of optical fiber caused by saturation of single CT of 3/2 connection
    Patent number: 10622804
    Abstract: The present disclosure relates to a method for preventing a maloperation of differential protection of an optical fiber caused by saturation of a single Current Transformer (CT) of 3/2 connection. By applying a combination of the differential judgment and the sub-CT current judgment, reliable identification of internal and external faults is ensured, and the problem of misjudging of the internal fault as the external fault can be prevented as well.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: April 14, 2020
    Assignees: XJ GROUP CORPORATION, XJ ELECTRIC CO., LTD., XUCHANG XJ SOFTWARE TECHNOLOGY CO., LTD., STATE GRID CORPORATION OF CHINA
    Inventors: Baowei Li, Chuankun Ni, Wenzheng Li, Xu Li, Ziqiang Jiang, Yanmei Tang, Huizhen Hao, Xin Shi, Jiansong Zhao, Xintao Dong, Yingying Xi, Quanxia Ma, Yantao Qiao, Yu Tang, Liping Meng
  • Prevention method of abnormal action protection of UHV regulating compensation transformer with no-load input
    Patent number: 10090670
    Abstract: The present invention relates to a prevention method of abnormal action protection of UHV regulating compensation transformer with no-load input, the prevention method includes: first determining a value of differential current of regulating compensation transformer, if the value of differential current is smaller than a pre-setting threshold, then, identifying whether an uninterruptible point of differential current waveform meets an pre-setting regulation according to original value of differential current or sampling value of differential difference current, and determining comprehensively whether the regulating compensation transformer is in no-load input or in fault directly with a value of second harmonic content of logic differential current together; if a value of differential current before pre-setting period is larger than the pre-setting threshold, the regulating compensation transformer is diagnosed to have external CT saturation, determining comprehensively whether the regulating compensation tra
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: October 2, 2018
    Assignees: XJ GROUP CORPORATION, STATE GRID CORPORATION OF CHINA
    Inventors: Jirui Chen, Jiansong Zhao, Yun Gong, Maojun Deng, Chuankun Ni, Dongxiao Yao, Heke Ma, Lijuan Lv, Baowei Li, Xu Li, Jidong Huang, Feng Xiao, Shasha Hu, Jingli Zhang, Yingying Xi
  • METHOD FOR PREVENTING DIFFERENTIAL PROTECTION MALOPERATION OF OPTICAL FIBER CAUSED BY SATURATION OF SINGLE CT OF 3/2 CONNECTION
    Publication number: 20170163024
    Abstract: The present disclosure relates to a method for preventing a maloperation of differential protection of an optical fiber caused by saturation of a single Current Transformer (CT) of 3/2 connection. By applying a combination of the differential judgment and the sub-CT current judgment, reliable identification of internal and external faults is ensured, and the problem of misjudging of the internal fault as the external fault can be prevented as well.
    Type: Application
    Filed: November 15, 2016
    Publication date: June 8, 2017
    Inventors: Baowei Li, Chuankun Ni, Wenzheng Li, Xu Li, Ziqiang Jiang, Yanmei Tang, Huizhen Hao, Xin Shi, Jiansong Zhao, Xintao Dong, Yingying Xi, Quanxia Ma, Yantao Qiao, Yu Tang, Liping Meng
  • PREVENTION METHOD OF ABNORMAL ACTION PROTECTION OF UHV REGULATING COMPENSATION TRANSFORMER WITH NO-LOAD INPUT
    Publication number: 20170018919
    Abstract: The present invention relates to a prevention method of abnormal action protection of UHV regulating compensation transformer with no-load input, the prevention method includes: first determining a value of differential current of regulating compensation transformer, if the value of differential current is smaller than a pre-setting threshold, then, identifying whether an uninterruptible point of differential current waveform meets an pre-setting regulation according to original value of differential current or sampling value of differential difference current, and determining comprehensively whether the regulating compensation transformer is in no-load input or in fault directly with a value of second harmonic content of logic differential current together; if a value of differential current before pre-setting period is larger than the pre-setting threshold, the regulating compensation transformer is diagnosed to have external CT saturation, determining comprehensively whether the regulating compensation tra
    Type: Application
    Filed: March 22, 2016
    Publication date: January 19, 2017
    Inventors: Jirui Chen, Jiansong Zhao, Yun Gong, Maojun Deng, Chuankun Ni, Dongxiao Yao, Heke Ma, Lijuan Lv, Baowei Li, Xu Li, Jidong Huang, Feng Xiao, Shasha Hu, Jingli Zhang, Yingying Xi