Patents by Inventor Guorui Zhang

Guorui 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: 8745007
    Abstract: A method is provided for handling synchrophasor measurements relating to an electrical power system. The method includes: (a) acquiring a plurality of synchrophasor measurements containing data representing at least one power system event; (b) inserting and storing the event related synchrophasor measurements in a database as a partitioned binary large object (BLOB); (c) reading and transferring the synchrophasor measurements related to a user selected current or historical event from the database to a client computer partition by partition; and (d) processing the event data at the client computer on a partition-by-partition basis such that the client computer will be able to start a replay of the event replay as soon as processing of the first partition of the event BLOB data is completed.
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: June 3, 2014
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Guorui Zhang, Hongtao Chen
  • Patent number: 8437969
    Abstract: A phasor measurement unit and method including a transducer for transduction measurement of an electrical characteristic of a current carrying element in electrical power generation or distribution systems, the transducer generating a transducer output signal representative of the electrical characteristic; an amplifier receiving the transducer output signal and generating an amplifier output signal; a filter receiving the amplifier output signal, low pass filtering the amplifier output signal, and generating a filter output signal; an analog to digital converter receiving the filter output signal and generating a digital output signal; and a processor receiving the digital output signal, calculating phasor data from the digital output signal and generating a data output signal, wherein the calculated phasor data is at least as accurate as phasor data from a phasor measurement unit or a frequency data recorder having a transducer for nontransduction measurement of the same electrical characteristic.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: May 7, 2013
    Assignee: Virginia Polytechnic Institute and State University
    Inventors: Guorui Zhang, Yilu Liu, Yingchen Zhang
  • Publication number: 20110040786
    Abstract: A method is provided for handling synchrophasor measurements relating to an electrical power system. The method includes: (a) acquiring a plurality of synchrophasor measurements containing data representing at least one power system event; (b) inserting and storing the event related synchrophasor measurements in a database as a partitioned binary large object (BLOB); (c) reading and transferring the synchrophasor measurements related to a user selected current or historical event from the database to a client computer partition by partition; and (d) processing the event data at the client computer on a partition-by-partition basis such that the client computer will be able to start a replay of the event replay as soon as processing of the first partition of the event BLOB data is completed.
    Type: Application
    Filed: August 11, 2009
    Publication date: February 17, 2011
    Applicant: Electric Power Research Institute, Inc.
    Inventors: Guorui Zhang, Hongtao Chen
  • Publication number: 20100250168
    Abstract: A phasor measurement unit and method including a transducer for transduction measurement of an electrical characteristic of a current carrying element in electrical power generation or distribution systems, the transducer generating a transducer output signal representative of the electrical characteristic; an amplifier receiving the transducer output signal and generating an amplifier output signal; a filter receiving the amplifier output signal, low pass filtering the amplifier output signal. and generating a filter output signal; a digital to analog converter receiving the filter output signal and generating a digital output signal; and a processor receiving the digital output signal, calculating phasor data from the digital output signal and generating a data output signal, wherein the calculated phasor data is at least as accurate as phasor data from a phasor measurement unit or a frequency data recorder having a transducer for nontransduction measurement of the same electrical characteristic.
    Type: Application
    Filed: March 15, 2010
    Publication date: September 30, 2010
    Inventors: Guorui ZHANG, Yilu Liu, Yingchen Zhang
  • Publication number: 20090307233
    Abstract: A real-time, wide-area power system monitoring and visualization system is provided, including comprising an application database adapted to contain a synchronized data object queue and configuration data; a web service; an event-triggered data archive service; an event database; and a smart client visualization application adapted to commence web service with the application database and the event database.
    Type: Application
    Filed: June 2, 2009
    Publication date: December 10, 2009
    Inventors: Guorui Zhang, Hongtao Chen
  • Publication number: 20090287739
    Abstract: A system for scheduling, changing, and maintaining an outage schedule includes a data entry module adapted to allow a user to enter data pertaining to an outage, a pre-defined database containing transaction rules to define transaction flows, a processing module, and a display module. The processing module is adapted to process the data entered into the data entry module and the transaction rules provided in the pre-defined database. The display module receives processed data from the processing module, transforms the processed data into visual information representative of the processed data, and displays the visual information on a display of a computing device.
    Type: Application
    Filed: May 15, 2008
    Publication date: November 19, 2009
    Inventors: Guorui Zhang, Chaoyang Jing, Steve Lee, Peter Hirsch