A VARIABLE SPEED WIND TURBINE, A RESONANT CONTROL SYSTEM, A METHOD OF OPERATING A VARIABLE SPEED WIND TURBINE, USE OF A RESONANT CONTROL SYSTEM AND USE OF A METHOD IN A VARIABLE SPEED WIND TURBINE

摘要

The invention relates to a variable speed wind turbine connected to a utility grid including a rotor, comprising at least one blade, a drive train connected to said rotor, said drive train comprising a selection of at least one gear box, and at least one electrical generator, measuring means establishing at least one rotational speed signal of the drive train, and at least one wind turbine power controller connected to said at least one generator and said utility grid. Furthermore said wind turbine comprises at least one resonant control means modifying a power reference value in response to said at least one rotational speed signal. The invention also relates to a resonant control system, a method of operating a variable speed wind turbine, use of resonant control system and use of a method in a variable speed wind turbine.