Patents by Inventor Ray Chatfield

Ray Chatfield 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 online ferroresonance detection
    Patent number: 9246326
    Abstract: The invention concerns a method and a system for online ferroresonance detection in a high voltage electrical distribution network. The method includes: Overflux detection (23), which acts as the start element, overflux being set if the flux is greater than a threshold for specified time duration, mode verification (26) which is to recognize the modes of the ferroresonance, a fuzzy logic method being used to discriminate the ferroresonance modes.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: January 26, 2016
    Assignees: ALSTOM TECHNOLOGY LTD., TSINGHUA UNIVERSITY
    Inventors: Xinzhou Dong, Xuyang Li, Zhiqian Bo, Ray Chatfield, Andrzej Klimek
  • METHOD AND SYSTEM FOR ONLINE FERRORESONANCE DETECTION
    Publication number: 20130166493
    Abstract: The invention concerns a method and a system for online ferroresonance detection in a high voltage electrical distribution network. The method includes: Overflux detection (23), which acts as the start element, overflux being set if the flux is greater than a threshold for specified time duration, mode verification (26) which is to recognize the modes of the ferroresonance, a fuzzy logic method being used to discriminate the ferroresonance modes.
    Type: Application
    Filed: October 5, 2010
    Publication date: June 27, 2013
    Applicants: Tsinghua University, Alstom Technology Ltd.
    Inventors: Xinzhou Dong, Xuyang Li, Zhiqian Bo, Ray Chatfield, Andrzej Klimek