Patents by Inventor Xiangqi ZHU

Xiangqi ZHU 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).

  • Coordinated voltage control and reactive power regulation between transmission and distribution systems
    Patent number: 11387651
    Abstract: Systems and methods are described for coordinating volt-var control between sub-transmission and distribution systems. Distributed energy resources of a distribution system are aggregated into virtual power plants from which reactive power can optimally be dispatched to the sub-transmission system. A sub-transmission controller executes a volt-var AC optimal power flow optimisation function to minimize voltage fluctuations that might otherwise occur when coordinating with a distribution system having distributed energy resources. The distribution system can use a sensitivity matrix for regulating voltage at distribution feeders while fulfilling a transmission or sub-transmission system's demand requests.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: July 12, 2022
    Assignees: Battelle Memorial Institute, North Carolina State University
    Inventors: Nader A. Samaan, Xinda Ke, Jesse T. Holzer, Renke Huang, Bharat Vyakaranam, Mallikarjuna Vallem, Marcelo A. Elizondo, Yuri Makarov, Ning Lu, Xiangqi Zhu, David Mulcahy, Catherine McEntee
  • System and method for sizing a capacity of an energy storage device
    Patent number: 10637245
    Abstract: A method and system for sizing energy storage device capacity. The method includes generating a load profile of at least an entity based on at least information acquired by a user interface, generating an ensemble of net load profiles based on at least the load profile and based on at least one energy source profile, determining values of cumulative distribution functions associated with a plurality of energy storage device capacities as a function of at least the ensemble of net load profiles, generating a graphical representation of a combination of the composite cumulative distribution functions and a cluster of equal probability line, rendering the graphical representation, and sizing a capacity of the energy storage device based on the rendered graphical representation.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: April 28, 2020
    Assignees: TOTAL S.A., NORTH CAROLINA STATE UNIVERSITY
    Inventors: Xiangqi Zhu, Wente Zeng, Jiahong Yan, Ning Lu
  • SYSTEM AND METHOD FOR SIZING A CAPACITY OF AN ENERGY STORAGE DEVICE
    Publication number: 20180351362
    Abstract: A method and system for sizing energy storage device capacity. The method includes generating a load profile of at least an entity based on at least information acquired by a user interface, generating an ensemble of net load profiles based on at least the load profile and based on at least one energy source profile, determining values of cumulative distribution functions associated with a plurality of energy storage device capacities as a function of at least the ensemble of net load profiles, generating a graphical representation of a combination of the composite cumulative distribution functions and a cluster of equal probability line, rendering the graphical representation, and sizing a capacity of the energy storage device based on the rendered graphical representation.
    Type: Application
    Filed: June 2, 2017
    Publication date: December 6, 2018
    Applicants: TOTAL S.A., NORTH CAROLINA STATE UNIVERSITY
    Inventors: Xiangqi ZHU, Wente ZENG, Jiahong YAN, Ning LU