Patents by Inventor Kijung ANN

Kijung ANN 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).

  • Transformer fault detection apparatus and method
    Patent number: 9766283
    Abstract: The transformer fault detection apparatus includes an integrated sensor unit for sensing signals through a plurality of sensors located on each of upper and lower drain valves in a transformer. A first possible discharge area calculation unit calculates a first possible discharge area estimated to be a location of a partial discharge source of the transformer, based on arrival times of signals sensed by different sensors located on the upper drain valve. A second possible discharge area calculation unit calculates a second possible discharge area estimated to be the location of the partial discharge source, based on arrival times of signals sensed by different sensors located on the lower drain valve. A final possible discharge area calculation unit calculates a final possible discharge area, based on an overlapping area between the first and second possible discharge areas.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: September 19, 2017
    Assignee: KOREA ELECTRIC POWER CORPORATION
    Inventors: Kison Han, Jinyul Yoon, Hyungjun Ju, Kijung Ann
  • TRANSFORMER FAULT DETECTION APPARATUS AND METHOD
    Publication number: 20150091598
    Abstract: The transformer fault detection apparatus includes an integrated sensor unit for sensing signals through a plurality of sensors located on each of upper and lower drain valves in a transformer. A first possible discharge area calculation unit calculates a first possible discharge area estimated to be a location of a partial discharge source of the transformer, based on arrival times of signals sensed by different sensors located on the upper drain valve. A second possible discharge area calculation unit calculates a second possible discharge area estimated to be the location of the partial discharge source, based on arrival times of signals sensed by different sensors located on the lower drain valve. A final possible discharge area calculation unit calculates a final possible discharge area, based on an overlapping area between the first and second possible discharge areas.
    Type: Application
    Filed: August 12, 2014
    Publication date: April 2, 2015
    Inventors: Kison HAN, Jinyul YOON, Hyungjun JU, Kijung ANN