Patents by Inventor Jinao LI

Jinao 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).

  • Method for detecting and locating single-phase ground fault on low current grounded power-distribution network
    Patent number: 10794945
    Abstract: A method and system for detecting and locating a single-phase ground fault on a low current grounded power-distribution network, comprising: respectively testing and picking up the voltage signals and current signals at multiple positions on each phase feeder (61), and determining the corresponding transient voltage signals and transient current signals according to the extraction of the voltage signals and the current signals (62); when the change in the transient voltage signals and the transient current signals exceeds a preset threshold (63), synchronously picking up the voltage signals and current signals at multiple positions on a three-phase feeder (64); calculating corresponding zero-sequence voltages and zero-sequence currents according to the voltage signals and current signals synchronously picked up at multiple positions on the three-phase feeder (65), and then extracting the steady-state signal and transient signal of the zero-sequence voltage and zero-sequence current at each position on the thr
    Type: Grant
    Filed: December 31, 2018
    Date of Patent: October 6, 2020
    Assignee: BEIJING INHAND NETWORKS TECHNOLOGY CO., LTD.
    Inventors: Xianwu Tang, Jianliang Zhang, Jinao Li, Hongwei Zang
  • METHOD AND SYSTEM FOR DETECTING AND LOCATING SINGLE-PHASE GROUND FAULT ON LOW CURRENT GROUNDED POWER-DISTRIBUTION NETWORK
    Publication number: 20190137556
    Abstract: A method and system for detecting and locating a single-phase ground fault on a low current grounded power-distribution network, comprising: respectively testing and picking up the voltage signals and current signals at multiple positions on each phase feeder (61), and determining the corresponding transient voltage signals and transient current signals according to the extraction of the voltage signals and the current signals (62); when the change in the transient voltage signals and the transient current signals exceeds a preset threshold (63), synchronously picking up the voltage signals and current signals at multiple positions on a three-phase feeder (64); calculating corresponding zero-sequence voltages and zero-sequence currents according to the voltage signals and current signals synchronously picked up at multiple positions on the three-phase feeder (65), and then extracting the steady-state signal and transient signal of the zero-sequence voltage and zero-sequence current at each position on the thr
    Type: Application
    Filed: December 31, 2018
    Publication date: May 9, 2019
    Applicant: BEIJING INHAND NETWORKS TECHNOLOGY CO., LTD.
    Inventors: Xianwu TANG, Jianliang ZHANG, Jinao LI, Hongwei ZANG
  • METHOD AND SYSTEM FOR DETECTING AND LOCATING SINGLE-PHASE GROUND FAULT ON LOW CURRENT GROUNDED POWER-DISTRIBUTION NETWORK
    Publication number: 20190137557
    Abstract: A method and system for detecting and locating a single-phase ground fault on a low current grounded power-distribution network, comprising: respectively testing and picking up the voltage signals and current signals at multiple positions on each phase feeder (61), and determining the corresponding transient voltage signals and transient current signals according to the extraction of the voltage signals and the current signals (62); when the change in the transient voltage signals and the transient current signals exceeds a preset threshold (63), synchronously picking up the voltage signals and current signals at multiple positions on a three-phase feeder (64); calculating corresponding zero-sequence voltages and zero-sequence currents according to the voltage signals and current signals synchronously picked up at multiple positions on the three-phase feeder (65), and then extracting the steady-state signal and transient signal of the zero-sequence voltage and zero-sequence current at each position on the thr
    Type: Application
    Filed: December 31, 2018
    Publication date: May 9, 2019
    Applicant: BEIJING INHAND NETWORKS TECHNOLOGY CO., LTD.
    Inventors: Xianwu TANG, Jianliang ZHANG, Jinao LI, Hongwei ZANG
  • Method and system for detecting and locating single-phase ground fault on low current grounded power-distribution network
    Patent number: 10222409
    Abstract: A method and system for detecting and locating a single-phase ground fault on a low current grounded power-distribution network, comprising: respectively testing and picking up the voltage signals and current signals at multiple positions on each phase feeder (61), and determining the corresponding transient voltage signals and transient current signals according to the extraction of the voltage signals and the current signals (62); when the change in the transient voltage signals and the transient current signals exceeds a preset threshold (63), synchronously picking up the voltage signals and current signals at multiple positions on a three-phase feeder (64); calculating corresponding zero-sequence voltages and zero-sequence currents according to the voltage signals and current signals synchronously picked up at multiple positions on the three-phase feeder (65), and then extracting the steady-state signal and transient signal of the zero-sequence voltage and zero-sequence current at each position on the thr
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: March 5, 2019
    Assignee: BEIJING INHAND NETWORKS TECHNOLOGY CO., LTD.
    Inventors: Xianwu Tang, Jianliang Zhang, Jinao Li, Hongwei Zang
  • METHOD AND SYSTEM FOR DETECTING AND LOCATING SINGLE-PHASE GROUND FAULT ON LOW CURRENT GROUNDED POWER-DISTRIBUTION NETWORK
    Publication number: 20160041216
    Abstract: A method and system for detecting and locating a single-phase ground fault on a low current grounded power-distribution network, comprising: respectively testing and picking up the voltage signals and current signals at multiple positions on each phase feeder (61), and determining the corresponding transient voltage signals and transient current signals according to the extraction of the voltage signals and the current signals (62); when the change in the transient voltage signals and the transient current signals exceeds a preset threshold (63), synchronously picking up the voltage signals and current signals at multiple positions on a three-phase feeder (64); calculating corresponding zero-sequence voltages and zero-sequence currents according to the voltage signals and current signals synchronously picked up at multiple positions on the three-phase feeder (65), and then extracting the steady-state signal and transient signal of the zero-sequence voltage and zero-sequence current at each position on the thr
    Type: Application
    Filed: March 27, 2014
    Publication date: February 11, 2016
    Inventors: Xianwu TANG, Jianliang ZHANG, Jinao LI, Hongwei ZANG