Patents by Inventor Qibing Zhang

Qibing Zhang 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).

  • Patent number: 11320492
    Abstract: State estimation in an electric power system includes acquiring electrical measurements from the electric power system at a reporting rate of the electrical measurements, processing the electrical measurements into sequence data including positive sequence data, processing positive sequence data by an observable state estimator to generate a plurality of estimated states including a plurality of estimated observable states, parameters of the observable state estimator being updated by a first training module in a first time thread, processing the plurality of estimated states by an unobservable state estimator to generate a plurality of estimated unobservable states, parameters of the unobservable state estimator being updated by a second training module in a second time thread independent of the first time thread, and outputting a plurality of final estimated states generated by concatenating the plurality of estimated observable states and the plurality of estimated unobservable states.
    Type: Grant
    Filed: November 6, 2020
    Date of Patent: May 3, 2022
    Assignees: Global Energy Interconnection Research Institute Co. Ltd, State Grid Coporation of China Co. Ltd, State Grid Jiangsu Electric Power Co., LTD., State Grid ShanXi Electric Power Company
    Inventors: Yingzhong Gu, Guanyu Tian, Chunlei Xu, Qibing Zhang, Ruisheng Diao, Di Shi
  • Patent number: 11264799
    Abstract: Systems and methods manage electrical loads in a grid by applying Robust principal component analysis (R-PCA) to decompose annual load profiles into low-rank components and sparse components; extracting one or more predetermined features; constructing a similarity graph; selecting submodular cluster centers through the constructed similarity graph; determining a cluster assignment based on selected centers; and applying the clustering assignment for load analysis.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: March 1, 2022
    Inventors: Yishen Wang, Haifeng Li, Di Shi, Qibing Zhang, Chunlei Xu, Zhiwei Wang
  • Patent number: 11029344
    Abstract: Systems and method are disclosed for monitor long-term voltage stability in a power system by estimating post-contingency operating point(s) considering PV-PQ transitions based on the current operating point; predicting a sensitivity based Thevenin index (STI) for each contingency using the estimated operating condition; and determining a voltage stability assessment (VSA) considering N?1 contingency.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: June 8, 2021
    Assignee: Geiri Co Ltd, State Grid Jiangxi Electric Power Co, State Grid Corp Of China, Geirina Inc.
    Inventors: Xiaohu Zhang, Di Shi, Xiao Lu, Zhehan Yi, Qibing Zhang, Zhiwei Wang
  • Publication number: 20210141029
    Abstract: State estimation in an electric power system includes acquiring electrical measurements from the electric power system at a reporting rate of the electrical measurements, processing the electrical measurements into sequence data including positive sequence data, processing positive sequence data by an observable state estimator to generate a plurality of estimated states including a plurality of estimated observable states, parameters of the observable state estimator being updated by a first training module in a first time thread, processing the plurality of estimated states by an unobservable state estimator to generate a plurality of estimated unobservable states, parameters of the unobservable state estimator being updated by a second training module in a second time thread independent of the first time thread, and outputting a plurality of final estimated states generated by concatenating the plurality of estimated observable states and the plurality of estimated unobservable states.
    Type: Application
    Filed: November 6, 2020
    Publication date: May 13, 2021
    Inventors: Yingzhong Gu, Guanyu Tian, Chunlei Xu, Qibing Zhang, Ruisheng Diao, Di Shi
  • Publication number: 20200144816
    Abstract: Systems and methods manage electrical loads in a grid by applying Robust principal component analysis (R-PCA) to decompose annual load profiles into low-rank components and sparse components; extracting one or more predetermined features; constructing a similarity graph; selecting submodular cluster centers through the constructed similarity graph; determining a cluster assignment based on selected centers; and applying the clustering assignment for load analysis.
    Type: Application
    Filed: April 23, 2019
    Publication date: May 7, 2020
    Inventors: Yishen Wang, Haifeng Li, Di Shi, Qibing Zhang, Chunlei Xu, Zhiwei Wang
  • Publication number: 20190137550
    Abstract: Systems and method are disclosed for monitor long-term voltage stability in a power system by estimating post-contingency operating point(s) considering PV-PQ transitions based on the current operating point; predicting a sensitivity based Thevenin index (STI) for each contingency using the estimated operating condition; and determining a voltage stability assessment (VSA) considering N?1 contingency.
    Type: Application
    Filed: August 22, 2018
    Publication date: May 9, 2019
    Inventors: Xiaohu Zhang, Di Shi, Xiao Lu, Zhehan Yi, Qibing Zhang, Zhiwei Wang