Patents by Inventor Deuk Woo Bae

Deuk Woo Bae 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 for suppressing circulating current in modular multilevel converter for high voltage direct-current transmission
    Patent number: 9444322
    Abstract: Provided is a method for suppressing a circulating current in a modular multi-level converter for a high voltage direction-current (HVDC) transmission system. The HVDC transmission system converts an alternating current (AC) into a direct current (DC) and vice versa, transmits energy using a DC cable, and including a modular multilevel converter generating a high voltage source by stacking a plurality of sub-modules in series. In the circulating current suppression method, a circulating current (idiffj; j=a,b,c) of a,b,c phase in an abc 3-phase stationary reference frame, a DC current (idc) flowing in a DC cable, a current reference value (i*dc) of a DC component that needs to flow in the DC cable are inputted. The circulating current (idiffj) of the a,b,c phase is controlled to become zero. A compensation value (V*diffj) for suppressing a harmonic component of the circulating current is outputted.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: September 13, 2016
    Assignee: Korea Electrotechnology Research Institute
    Inventors: Jung Woo Park, Dae Wook Kang, Jong Hyun Kim, Dong Wook Yoo, Ji Woo Moon, Jin Soo Kwon, Chun Sung Kim, Deuk Woo Bae
  • Method for Suppressing Circulating Current in Modular Multilevel Converter for High Voltage Direct-Current Transmission
    Publication number: 20140226373
    Abstract: Provided is a method for suppressing a circulating current in a modular multi-level converter for a high voltage direction-current (HVDC) transmission system. The HVDC transmission system converts an alternating current (AC) into a direct current (DC) and vice versa, transmits energy using a DC cable, and including a modular multilevel converter generating a high voltage source by stacking a plurality of sub-modules in series. In the circulating current suppression method, a circulating current (idiffj; j=a,b,c) of a,b,c phase in an abc 3-phase stationary reference frame, a DC current (idc) flowing in a DC cable, a current reference value (i*dc) of a DC component that needs to flow in the DC cable are inputted. The circulating current (idiffj) of the a,b,c phase is controlled to become zero. A compensation value (V*diffj) for suppressing a harmonic component of the circulating current is outputted.
    Type: Application
    Filed: October 25, 2013
    Publication date: August 14, 2014
    Applicant: Korea Electrotechnology Research Institute
    Inventors: Jung Woo Park, Dae Wook Kang, Jong Hyun Kim, Dong Wook Yoo, Ji Woo Moon, Jin Soo Kwon, Chun Sung Kim, Deuk Woo Bae