Patents by Inventor John Olav G. Tande

John Olav G. Tande 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).

  • Method for damping tower vibrations in a wind turbine installation
    Patent number: 8186949
    Abstract: A method in connection with a wind turbine installation for damping tower vibrations, in particular a floating wind turbine installation comprising a floating cell, a tower arranged over the floating cell, a generator mounted on the tower that is rotatable in relation to the wind direction and fitted with a wind turbine, and an anchor line arrangement connected to anchors or foundations on the sea bed. The tower's eigenvibrations, ?eig, are damped by, in addition to control with the controller in the constant power or RPM range of the wind turbine, an increment, ??, being added to the blade angle of the turbine blades on the basis of the tower velocities, ?Z, so that the eigenvibrations are counteracted.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: May 29, 2012
    Assignee: StatoilHydro ASA
    Inventors: Finn Gunnar Nielsen, Bjorn Skaare, John Olav G. Tande, Ian Norheim, Kjetil Uhlen
  • Method for Damping Tower Vibrations in a Wind Turbine Installation
    Publication number: 20080260514
    Abstract: A method in connection with a wind turbine installation for damping tower vibrations, in particular a floating wind turbine installation comprising a floating cell, a tower arranged over the floating cell, a generator mounted on the tower that is rotatable in relation to the wind direction and fitted with a wind turbine, and an anchor line arrangement connected to anchors or foundations on the sea bed. The tower's eigenvibrations, ?eig, are damped by, in addition to control with the controller in the constant power or RPM range of the wind turbine, an increment, ??, being added to the blade angle of the turbine blades on the basis of the tower velocities, ?Z, so that the eigenvibrations are counteracted.
    Type: Application
    Filed: October 30, 2006
    Publication date: October 23, 2008
    Applicant: STATOILHYDRO ASA
    Inventors: Finn Gunnar Nielsen, Bjorn Skaare, John Olav G. Tande, Ian Norheim, Kjetil Uhlen