Patents by Inventor Neeraj Karnik

Neeraj Karnik 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).

  • Power system sub-synchronous oscillation damper
    Patent number: 9660449
    Abstract: A control circuit for power system sub-synchronous oscillation dampening is described. The control circuit is configured to provide low impedance at sub-synchronous frequencies and high impedance at the fundamental frequency. The control circuit includes an input configured to receive a direct voltage value and a quadrature voltage value. Both the direct voltage value and the quadrature voltage value are based on a three-phase voltage. At least one controller configured to determine a direct current value and a quadrature current value based at least in part on the direct voltage value and the quadrature voltage value is included. The control circuit also includes an output configured to send the direct current value and the quadrature current value as feed forward signals to a control loop for the three-phase voltage.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: May 23, 2017
    Assignee: GL PWRSOLUTIONS, INC.
    Inventors: Hamed Khalili Nia, Mandhir Sahni, Neeraj Karnik, Haiping Yin
  • POWER SYSTEM SUB-SYNCHRONOUS OSCILLATION DAMPER
    Publication number: 20160141991
    Abstract: A control circuit for power system sub-synchronous oscillation dampening is described. The control circuit is configured to provide low impedance at sub-synchronous frequencies and high impedance at the fundamental frequency. The control circuit includes an input configured to receive a direct voltage value and a quadrature voltage value. Both the direct voltage value and the quadrature voltage value are based on a three-phase voltage. At least one controller configured to determine a direct current value and a quadrature current value based at least in part on the direct voltage value and the quadrature voltage value is included. The control circuit also includes an output configured to send the direct current value and the quadrature current value as feed forward signals to a control loop for the three-phase voltage.
    Type: Application
    Filed: November 13, 2015
    Publication date: May 19, 2016
    Inventors: Hamed Khalili Nia, Mandhir Sahni, Neeraj Karnik, Haiping Yin