Patents by Inventor Gaoren LIU

Gaoren LIU 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).

  • DC voltage droop control method with dead-band for HVDC grids based on DC voltage fiducial node
    Patent number: 10277032
    Abstract: The present invention discloses a fiducial node DC voltage based DC voltage droop control method with dead-band for HVDC grids. Two levels of DC voltage control e.g. primary and secondary DC voltage regulation are introduced to realize load sharing and DC voltage control in HVDC grids. In the process of primary DC voltage regulation, the power flow regulation ability of the entire HVDC grids can be significantly improved, and the DC voltage and stability of the HVDC grids will be quickly controlled and guaranteed for the benefit of droop characteristic. Secondary DC voltage regulation is achieved by by introducing the load-DC voltage controller. In the process of secondary DC voltage regulation, the burden of accommodating power imbalance by the DC voltage fiducial node will be alleviated, thus improving the ability to resist disturbances of the entire HVDC grids.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: April 30, 2019
    Assignee: Zhejiang University
    Inventors: Zheng Xu, Liang Xiao, Gaoren Liu, Huangqing Xiao
  • DC VOLTAGE DROP CONTROL METHOD WITH DEAD-BAND FOR HVDC GRIDS BASED ON DC VOLTAGE FIDUCIAL NODE
    Publication number: 20170346288
    Abstract: The present invention discloses a fiducial node DC voltage based DC voltage droop control method with dead-band for HVDC grids. Two levels of DC voltage control e.g. primary and secondary DC voltage regulation are introduced to realize load sharing and DC voltage control in HVDC grids. In the process of primary DC voltage regulation, the power flow regulation ability of the entire HVDC grids can be significantly improved, and the DC voltage and stability of the HVDC grids will be quickly controlled and guaranteed for the benefit of droop characteristic. Secondary DC voltage regulation is achieved by by introducing the load-DC voltage controller. In the process of secondary DC voltage regulation, the burden of accommodating power imbalance by the DC voltage fiducial node will be alleviated, thus improving the ability to resist disturbances of the entire HVDC grids.
    Type: Application
    Filed: May 26, 2017
    Publication date: November 30, 2017
    Inventors: Zheng XU, Liang XIAO, Gaoren LIU, Huangqing XIAO