Patents by Inventor Siyun Li

Siyun Li 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).

  • Patent number: 12294218
    Abstract: A fully-distributed reactive voltage control method, includes: establishing a power grid reactive voltage optimization model of a power grid; parting the power grid reactive voltage optimization model into a plurality of area reactive voltage optimization models of a plurality of areas of the power grid; converting a power flow equation constraint in each of the plurality of area reactive voltage optimization models to a linear regression model; solving the linear regression model by using a robust recursive regression algorithm to obtain a solution result of the linear regression model; solving each of the plurality of area reactive voltage optimization models by using the solution result of the linear regression model, a gradient projection algorithm, and an alternating direction multiplier algorithm, so as to realize a reactive voltage optimization control of each of the plurality of areas.
    Type: Grant
    Filed: March 23, 2023
    Date of Patent: May 6, 2025
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Wenchuan Wu, Siyun Li, Bin Wang, Hongbin Sun, Qinglai Guo
  • Publication number: 20250070565
    Abstract: A method and system for power grid optimization control based on a linear time-varying model is provided. The system model is first estimated offline using historical data combined with a piecewise linear regression method that supports a vector regression model. For online applications, a time-varying linear model prediction control framework based on a piecewise linear model coordinates the optimization control of both fast and slow regulating devices in the power grid. This approach does not require precise system model parameters, instead learning the power grid model from historical data. The method optimizes voltage distribution, reduces operating costs, and addresses issues like bad data and collinearity in the historical data, improving the voltage quality and enabling optimal operation even with incomplete models.
    Type: Application
    Filed: August 23, 2024
    Publication date: February 27, 2025
    Applicant: TSINGHUA UNIVERSITY
    Inventors: Wenchuan WU, Siyun LI, Bin WANG, Chenhui LIN, Hongbin SUN, Qinglai GUO
  • Publication number: 20230307912
    Abstract: A fully-distributed reactive voltage control method, includes: establishing a power grid reactive voltage optimization model of a power grid; parting the power grid reactive voltage optimization model into a plurality of area reactive voltage optimization models of a plurality of areas of the power grid; converting a power flow equation constraint in each of the plurality of area reactive voltage optimization models to a linear regression model; solving the linear regression model by using a robust recursive regression algorithm to obtain a solution result of the linear regression model; solving each of the plurality of area reactive voltage optimization models by using the solution result of the linear regression model, a gradient projection algorithm, and an alternating direction multiplier algorithm, so as to realize a reactive voltage optimization control of each of the plurality of areas.
    Type: Application
    Filed: March 23, 2023
    Publication date: September 28, 2023
    Inventors: Wenchuan WU, Siyun LI, Bin WANG, Hongbin SUN, Qinglai GUO
  • Patent number: 7129988
    Abstract: An adaptive intra-field algorithm to de-interlace video data uses two line memories to implement a median filter that can use multiple data points on adjacent lines of display. In a median-mode, the filter outputs the median of the input data to create the value for a location on the intermediate line and can decrease image blurring. But if examination of the two adjacent pixels on two adjacent scan lines is small, as in the case of a vertical image line, the filter operates as a line average filter, to avoid creating image artifacts.
    Type: Grant
    Filed: February 25, 2003
    Date of Patent: October 31, 2006
    Assignee: ChronTel, Inc.
    Inventors: Yiwei Wang, Siyun Li
  • Publication number: 20030160895
    Abstract: An adaptive intra-field algorithm to de-interlace video data uses two line memories to implement a median filter that can use multiple data points on adjacent lines of display. In a median-mode, the filter outputs the median of the input data to create the value for a location on the intermediate line and can decrease image blurring. But if examination of the two adjacent pixels on two adjacent scan lines is small, as in the case of a vertical image line, the filter operates as a line average filter, to avoid creating image artifacts.
    Type: Application
    Filed: February 25, 2003
    Publication date: August 28, 2003
    Inventors: Yiwei Wang, Siyun Li