Abstract: In a first aspect, the present invention provides a method for detecting a wake situation in a wind farm comprising a plurality of wind turbines theoretically distributed according to a theoretical layout, one or more of the wind turbines having one or more load sensors. The method comprises obtaining, for one or more of the wind turbines with load sensors, load measurements from the load sensors during a predefined time interval. The method further comprises obtaining a qualified layout by qualifying in the layout each wind turbine for which load measurements have been obtained as overloaded or non-overloaded according to its load measurements. Finally, the obtained qualified layout is used to detect the wake situation.

Abstract: In a first aspect, the present invention provides a method for detecting a wake situation in a wind farm comprising a plurality of wind turbines theoretically distributed according to a theoretical layout, one or more of the wind turbines having one or more load sensors. The method comprises obtaining, for one or more of the wind turbines with load sensors, load measurements from the load sensors during a predefined time interval. The method further comprises obtaining a qualified layout by qualifying in the layout each wind turbine for which load measurements have been obtained as overloaded or non-overloaded according to its load measurements. Finally, the obtained qualified layout is used to detect the wake situation.

Abstract: An apparatus, method and computer program for controlling the tension in roll-based print media. The apparatus comprises: an encoder arranged to detect an angular displacement of a roll of print media; a processing unit arranged to determine the radius of the roll of print media based on the detected angular displacement of the roll of print media; a motor arranged to apply torque to the roll of print media to create tension in the print media; and a controller arranged to control the torque applied by the motor based on the determined radius of the roll of print media.