Patents by Inventor Yusheng Luo

Yusheng Luo 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).

  • Synchronization control for reconnecting microgrid to main grid after islanding
    Patent number: 9720395
    Abstract: A method and system are provided. The method includes synchronously reconnecting a microgrid to a main grid after islanding of the microgrid. The synchronously reconnecting step includes calculating a phase angle difference between synchrophasor measurements collected from a common coupling on the main grid and synchrophasor measurements collected from a common coupling on the microgrid. The synchronously reconnecting step further includes calculating, by a controller, a frequency reference deviation based on the phase angle difference. The synchronously reconnecting step also includes adjusting a frequency of the diesel generator based on the frequency reference deviation.
    Type: Grant
    Filed: November 18, 2014
    Date of Patent: August 1, 2017
    Assignee: NEC Corporation
    Inventors: Di Shi, Ratnesh Sharma, Yusheng Luo
  • SYNCHRONIZATION CONTROL FOR RECONNECTING MICROGRID TO MAIN GRID AFTER ISLANDING
    Publication number: 20160266559
    Abstract: A method and system are provided. The method includes synchronously reconnecting a microgrid to a main grid after islanding of the microgrid. The synchronously reconnecting step includes calculating a phase angle difference between synchrophasor measurements collected from a common coupling on the main grid and synchrophasor measurements collected from a common coupling on the microgrid. The synchronously reconnecting step further includes calculating, by a controller, a frequency reference deviation based on the phase angle difference. The synchronously reconnecting step also includes adjusting a frequency of the diesel generator based on the frequency reference deviation.
    Type: Application
    Filed: November 18, 2014
    Publication date: September 15, 2016
    Inventors: Di Shi, Ratnesh Sharma, Yusheng Luo