Patents by Inventor Lijuan Lv

Lijuan Lv 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).

  • 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
  • Sampling implementation method and device based on conventional sampling goose trip mode
    Patent number: 9985428
    Abstract: Sampling implementation method and device based on conventional sampling GOOSE trip mode. CPU of master NPI plug-in, after receiving a second pulse, transmits sampling pulse generation time and a transmission enable bit to FPGA of the master NPI plug-in at a fixed interval; after detecting the transmission enable bit, the FPGA of the master NPI plug-in judges whether time of its internal timer is greater than/equal to the sampling pulse generation time, if yes, generates a sampling pulse to FPGA of collection plug-in; after receiving sampling pulse, the collection plug-in carries out A/D sampling, and transmits sampled data to the master NPI plug-in; when detecting that all A/D samplings are completed, the master NPI plug-in transmits data packets to protection CPU plug-in. The device includes an MMI plug-in, a protection CPU plug-in, a master NPI plug-in and a collection plug-in. Protection maloperation is thereby reduced.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: May 29, 2018
    Assignees: XJ Group Corporation, XJ Electric Co., Ltd., Xuchang XJ Software Technology Co., Ltd., State Grid Corporation of China
    Inventors: Jirui Chen, Maojun Deng, Chuankun Ni, Lijuan Lv, Heke Ma, Dongxiao Yao, Baowei Li, Xu Li, Jidong Huang, Feng Xiao, Shasha Hu, Jingli Zhang, Yingying Xi
  • SAMPLING IMPLEMENTATION METHOD AND DEVICE BASED ON CONVENTIONAL SAMPLING GOOSE TRIP MODE
    Publication number: 20170070336
    Abstract: Sampling implementation method and device based on conventional sampling GOOSE trip mode. CPU of master NPI plug-in, after receiving a second pulse, transmits sampling pulse generation time and a transmission enable bit to FPGA of the master NPI plug-in at a fixed interval; after detecting the transmission enable bit, the FPGA of the master NPI plug-in judges whether time of its internal timer is greater than/equal to the sampling pulse generation time, if yes, generates a sampling pulse to FPGA of collection plug-in; after receiving sampling pulse, the collection plug-in carries out A/D sampling, and transmits sampled data to the master NPI plug-in; when detecting that all A/D samplings are completed, the master NPI plug-in transmits data packets to protection CPU plug-in. The device includes an MMI plug-in, a protection CPU plug-in, a master NPI plug-in and a collection plug-in. Protection maloperation is thereby reduced.
    Type: Application
    Filed: September 9, 2016
    Publication date: March 9, 2017
    Inventors: Jirui Chen, Maojun Deng, Chuankun Ni, Lijuan Lv, Heke Ma, Dongxiao Yao, Baowei Li, Xu Li, Jidong Huang, Feng Xiao, Shasha Hu, Jingli Zhang, Yingying Xi
  • 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