Patents by Inventor Emma Mary Stewart

Emma Mary Stewart 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 and system for locating the source of events in power distribution systems using distribution-level PMU data
    Patent number: 11211800
    Abstract: A method and system is disclosed for identifying a location of an event in a power distribution network. The method includes receiving voltage and current flowing downstream and upstream of the distribution feeder from at least two distribution-level phasor measurement units (PMUs) installed on a distribution feeder in the power distribution network; calculating changes in forward nodal voltages along the distribution feeder using measurements from at least one PMU of the at least two distribution-level PMUs; calculating changes in backward nodal voltages along the distribution feeder using the measurements from another PMU of the at least two distribution-level PMUs; comparing the calculated changes in the forward nodal voltages to the calculated changes in the backward nodal voltages; and determining the location of the event based on the comparison of the calculated changes of the forward nodal voltages to the calculated changes backward nodal voltages.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: December 28, 2021
    Assignees: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, LAWRENCE LIVERMORE NATIONAL SECURITY, LLC
    Inventors: Hamed Mohsenian-Rad, Mohammad Farajollahi, Alireza Shahsavari, Emma Mary Stewart
  • Real-time disaggregation of renewable energy generation on an electricity distribution system
    Patent number: 10554049
    Abstract: Techniques are described for disaggregation of renewable energy generation on an electricity distribution system. Aggregate power measurements are identified a distribution substation. Active power load of the distribution substation and active power generated by renewable energy sites can be disaggregated from the aggregate power measurements.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: February 4, 2020
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Emma Mary Stewart, Ciaran Martin Roberts, Emre can Kara, Michaelangelo David Tabone
  • METHOD AND SYSTEM FOR LOCATING THE SOURCE OF EVENTS IN POWER DISTRIBUTION SYSTEMS USING DISTRIBUTION-LEVEL PMU DATA
    Publication number: 20190379209
    Abstract: A method and system is disclosed for identifying a location of an event in a power distribution network. The method includes receiving voltage and current flowing downstream and upstream of the distribution feeder from at least two distribution-level phasor measurement units (PMUs) installed on a distribution feeder in the power distribution network; calculating changes in forward nodal voltages along the distribution feeder using measurements from at least one PMU of the at least two distribution-level PMUs; calculating changes in backward nodal voltages along the distribution feeder using the measurements from another PMU of the at least two distribution-level PMUs; comparing the calculated changes in the forward nodal voltages to the calculated changes in the backward nodal voltages; and determining the location of the event based on the comparison of the calculated changes of the forward nodal voltages to the calculated changes backward nodal voltages.
    Type: Application
    Filed: June 7, 2019
    Publication date: December 12, 2019
    Applicants: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, Lawrence Livermore National Security, LLC
    Inventors: Hamed Mohsenian-Rad, Mohammad Farajollahi, Alireza Shahsavari, Emma Mary Stewart
  • REAL-TIME DISAGGREGATION OF RENEWABLE ENERGY GENERATION ON AN ELECTRICITY DISTRIBUTION SYSTEM
    Publication number: 20170271877
    Abstract: Techniques are described for disaggregation of renewable energy generation on an electricity distribution system. Aggregate power measurements are identified a distribution substation. Active power load of the distribution substation and active power generated by renewable energy sites can be disaggregated from the aggregate power measurements.
    Type: Application
    Filed: March 20, 2017
    Publication date: September 21, 2017
    Inventors: Emma Mary Stewart, Ciaran Martin Roberts, Emre can Kara, Michaelangelo David Tabone