Patents by Inventor Yunjie GU

Yunjie GU 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 generation system, system for suppressing sub-synchronous oscillation and method for controlling operation of power system
    Patent number: 10819262
    Abstract: The present invention discloses a power generation system including a double-fed induction generator, a power converter, and a controller. The double-fed induction generator includes a rotor and a stator coupled to a grid. The power converter includes a rotor side converter coupled to the rotor of the generator, a grid side converter coupled to the grid, and a DC bus coupled between the rotor side converter and the grid side converter. The controller includes a rotor side controller for controlling the rotor side converter and a grid side controller for controlling the grid side converter. The rotor side controller includes a compensator having a transfer function and configured to counter a negative resistance effect of the generator to suppress sub-synchronous oscillations. The present invention further discloses a system for suppressing sub-synchronous oscillations and a method for controlling operation of a power system.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: October 27, 2020
    Assignee: General Electric Company
    Inventors: Yunjie Gu, Yuxiang Wang, Jiao Liu, Zhuohui Tan, David Smith, Wei Ren, Wuhua Li
  • POWER GENERATION SYSTEM, SYSTEM FOR SUPPRESSING SUB-SYNCHRONOUS OSCILLATION AND METHOD FOR CONTROLLING OPERATION OF POWER SYSTEM
    Publication number: 20190089279
    Abstract: The present invention discloses a power generation system including a double-fed induction generator, a power converter, and a controller. The double-fed induction generator includes a rotor and a stator coupled to a grid. The power converter includes a rotor side converter coupled to the rotor of the generator, a grid side converter coupled to the grid, and a DC bus coupled between the rotor side converter and the grid side converter. The controller includes a rotor side controller for controlling the rotor side converter and a grid side controller for controlling the grid side converter. The rotor side controller includes a compensator having a transfer function and configured to counter a negative resistance effect of the generator to suppress sub-synchronous oscillations. The present invention further discloses a system for suppressing sub-synchronous oscillations and a method for controlling operation of a power system.
    Type: Application
    Filed: September 10, 2018
    Publication date: March 21, 2019
    Inventors: Yunjie GU, Yuxiang WANG, Jiao LIU, Zhuohui TAN, David SMITH, Wei REN, Wuhua LI