Abstract: The present disclosure relates to a wind turbine (10) comprising a wind turbine tower (15), a nacelle including a primary frame (110), wherein the primary frame is connected to the tower (15). The wind turbine further comprises a secondary structure (120) connected to the primary frame (110) and one or more flexible couplings (130) between the primary frame (110) and the secondary structure (120) configured to reduce transmission of deformations from the primary frame (110) to the secondary structure (120). The present disclosure also relates to secondary structures (120) configured to be connected to primary frames (110) and to methods (500) for refurbishing a secondary structure (120) of a wind turbine (10).

Abstract: Loads reduction method in a wind turbine for power-grid disconnection during a wind gust, which uses a control system made up of three loops used to correct the speed at which the wind turbine blades are moved to the feathered position throughout a controlled emergency stop, with a non-linear law that takes into account blade position, tower vibrations and generator rotation speed limits.