Patents by Inventor Cao Shu Yu

Cao Shu Yu 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).

  • Direct power and stator flux vector control of a generator for wind energy conversion system
    Patent number: 9722520
    Abstract: A method for controlling a variable speed wind turbine generator is disclosed. The generator is connected to a power converter comprising switches. The generator comprises a stator and a set of terminals connected to the stator and to the switches of the power converter. The method comprises: determining a stator flux reference value corresponding to a generator power of a desired magnitude, determining an estimated stator flux value corresponding to an actual generator power, determining a difference between the determined stator flux reference value and the estimated stator flux value, and operating said switches in correspondence to the determined stator flux reference value and the estimated stator flux value to adapt at least one stator electrical quantity to obtain said desired generator power magnitude.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: August 1, 2017
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Anshuman Tripathi, Cao Shu Yu, Allan Holm Jörgensen, Lars Helle
  • Direct power and stator flux vector control of a generator for wind energy conversion system
    Patent number: 8686695
    Abstract: A method for controlling a variable speed wind turbine generator is disclosed. The generator is connected to a power converter comprising switches. The generator comprises a stator and a set of terminals connected to the stator and to the switches of the power converter. The method comprises: determining a stator flux reference value corresponding to a generator power of a desired magnitude, determining an estimated stator flux value corresponding to an actual generator power, determining a difference between the determined stator flux reference value and the estimated stator flux value, and operating said switches in correspondence to the determined stator flux reference value and the estimated stator flux value to adapt at least one stator electrical quantity to obtain said desired generator power magnitude.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: April 1, 2014
    Assignee: Vestas Wind Systems A/S
    Inventors: Anshuman Tripathi, Lars Helle, Allan Holm Jörgensen, Cao Shu Yu, Saurabh Gupta
  • Direct power and stator flux vector control of a generator for wind energy conversion system
    Publication number: 20130147442
    Abstract: A method for controlling a variable speed wind turbine generator is disclosed. The generator is connected to a power converter comprising switches. The generator comprises a stator and a set of terminals connected to the stator and to the switches of the power converter. The method comprises: determining a stator flux reference value corresponding to a generator power of a desired magnitude, determining an estimated stator flux value corresponding to an actual generator power, determining a difference between the determined stator flux reference value and the estimated stator flux value, and operating said switches in correspondence to the determined stator flux reference value and the estimated stator flux value to adapt at least one stator electrical quantity to obtain said desired generator power magnitude.
    Type: Application
    Filed: August 28, 2009
    Publication date: June 13, 2013
    Applicant: VESTAS WIND SYSTEMS A/S
    Inventors: Anshuman Tripathi, Cao Shu Yu, Allan Holm Jörgensen, Lars Helle, Saurabh Gupta
  • Direct power and stator flux vector control of a generator for wind energy conversion system
    Patent number: 8395360
    Abstract: A method for controlling a variable speed wind turbine generator is disclosed. The generator is connected to a power converter comprising switches. The generator comprises a stator and a set of terminals connected to the stator and to the switches of the power converter. The method comprises: determining a stator flux reference value corresponding to a generator power of a desired magnitude, determining an estimated stator flux value corresponding to an actual generator power, determining a difference between the determined stator flux reference value and the estimated stator flux value, and operating said switches in correspondence to the determined stator flux reference value and the estimated stator flux value to adapt at least one stator electrical quantity to obtain said desired generator power magnitude.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: March 12, 2013
    Assignee: Vestas Wind Systems A/S
    Inventors: Anshuman Tripathi, Cao Shu Yu, Allan Holm Jörgensen, Lars Helle, Saurabh Gupta
  • DIRECT POWER AND STATOR FLUX VECTOR CONTROL OF A GENERATOR FOR WIND ENERGY CONVERSION SYSTEM
    Publication number: 20130009611
    Abstract: A method for controlling a variable speed wind turbine generator is disclosed. The generator is connected to a power converter comprising switches. The generator comprises a stator and a set of terminals connected to the stator and to the switches of the power converter. The method comprises: determining a stator flux reference value corresponding to a generator power of a desired magnitude, determining an estimated stator flux value corresponding to an actual generator power, determining a difference between the determined stator flux reference value and the estimated stator flux value, and operating said switches in correspondence to the determined stator flux reference value and the estimated stator flux value to adapt at least one stator electrical quantity to obtain said desired generator power magnitude.
    Type: Application
    Filed: October 27, 2009
    Publication date: January 10, 2013
    Applicant: VESTAS WIND SYSTEMS A/S
    Inventors: Anshuman Tripathi, Lars Helle, Allan Holm Jörgensen, Cao Shu Yu, Saurabh Gupta
  • DIRECT POWER AND STATOR FLUX VECTOR CONTROL OF A GENERATOR FOR WIND ENERGY CONVERSION SYSTEM
    Publication number: 20120268081
    Abstract: A method for controlling a variable speed wind turbine generator is disclosed. The generator is connected to a power converter comprising switches. The generator comprises a stator and a set of terminals connected to the stator and to the switches of the power converter. The method comprises: determining a stator flux reference value corresponding to a generator power of a desired magnitude, determining an estimated stator flux value corresponding to an actual generator power, determining a difference between the determined stator flux reference value and the estimated stator flux value, and operating said switches in correspondence to the determined stator flux reference value and the estimated stator flux value to adapt at least one stator electrical quantity to obtain said desired generator power magnitude.
    Type: Application
    Filed: October 14, 2011
    Publication date: October 25, 2012
    Applicant: VESTAS WIND SYSTEMS A/S
    Inventors: Anshuman Tripathi, Cao Shu Yu, Allan Holm Jorgensen, Lars Helle, Saurabh Gupta