Patents by Inventor Thomas Schmidt GRAU

Thomas Schmidt GRAU 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).

  • Adaptive active power control in renewable energy power plants
    Patent number: 10958071
    Abstract: A method for operating a renewable energy power plant comprising a plurality of renewable energy generators. The method comprises: identifying a predetermined condition of the renewable energy power plant, of the grid, or of the connection between the renewable energy power plant and the grid, the predetermined condition indicating a weak grid interconnection between the renewable energy power plant and the grid; and controlling each renewable energy generator in an adaptive active power mode in response to recovery of the grid from a voltage deviation. The adaptive active power mode comprises: determining a thermal capacity of a chopper resistor of the renewable energy generator; calculating, based upon the determined thermal capacity, a limit level of rate of change of active power output that may be implemented by the renewable energy generator; and operating the renewable energy generator to output active power at the calculated rate of change limit level.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: March 23, 2021
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Manoj Gupta, Ravi Kumar, Janakiraman Sivasankaran, Thomas Schmidt Grau, Martin Ansbjerg Kjær, Kouroush Nayebi, John Godsk Nielsen, Jesper Sandberg Thomsen
  • ADAPTIVE ACTIVE POWER CONTROL IN RENEWABLE ENERGY POWER PLANTS
    Publication number: 20210006068
    Abstract: A method for operating a renewable energy power plant comprising a plurality of renewable energy generators. The method comprises: identifying a predetermined condition of the renewable energy power plant, of the grid, or of the connection between the renewable energy power plant and the grid, the predetermined condition indicating a weak grid interconnection between the renewable energy power plant and the grid; and controlling each renewable energy generator in an adaptive active power mode in response to recovery of the grid from a voltage deviation. The adaptive active power mode comprises: determining a thermal capacity of a chopper resistor of the renewable energy generator; calculating, based upon the determined thermal capacity, a limit level of rate of change of active power output that may be implemented by the renewable energy generator; and operating the renewable energy generator to output active power at the calculated rate of change limit level.
    Type: Application
    Filed: November 20, 2018
    Publication date: January 7, 2021
    Inventors: Manoj GUPTA, Ravi KUMAR, Janakiraman SIVASANKARAN, Thomas Schmidt GRAU, Martin Ansbjerg KJÆR, Kouroush NAYEBI, John NIELSEN, Jesper Sandberg THOMSEN