Envision Energy (denmark) Aps

Gamesa Innovation & Technology, S.l.

Envision Energy Aps

Michael Friedrich

Peter Grabau

Anders Varming Rebsdorf

José Ignacio Llorente González

Christian Meldgaard

Karl Aarhus

Anders Rebsdorf

Carsten Bendix Sørensen

Luis Miguel Garcillan Rueda

Keld Stefan Pedersen

Enrique Gomez De Las Heras Carbonell

Jose Ignacio Llorente González

Jesus Zaldua Lasa

Rasmus Andersen

Jesús Zaldua Lasa

The present invention relates a wind turbine comprising a wind turbine tower with a nacelle provided on the top to which a rotor hub with one or more wind turbine blades is rotatably mounted so that they form a rotor plane. A floating foundation having a upper section is mounted to the bottom of the wind turbine tower, wherein the foundation has a buoyant body configured to be installed at an offshore position having a water depth of about 40 m or more. The wind turbine blade comprises an inner blade section coupled to an outer blade section by a pitch junction in which a pitch mechanism is coupled to a pitch control system configured to regulate the pitch of the outer blade section relative to the inner blade section at wind speeds above a first wind speed. This allows the pitching to be used to counteract the tilting of the wind turbine caused by the different thrusts acting on the structure. This allows for a more linear control of the bending moment induced in the structure, since the blade sections provides a more constant thrust acting on the rotor hub which in turn allows the large negative damping loads and stresses introduced in the wind turbine to be eliminated.

Partial pitch wind turbine with floating foundation

A blade for a partial pitch wind turbine is described, wherein the blade has a truncated aerodynamic profile provided at the pitch junction of the blade. The truncated trailing edge acts to prevent the formation of a trailing edge gap during pitching between the trailing edges of the inner and outer blade sections of a partial pitch blade, thereby reducing the negative impact of air leakage, etc., when pitching a partial pitch blade.

Wind turbine blade

A method for controlling a two-bladed pitchable swept-blade wind turbine in extreme wind conditions is described, wherein when extreme conditions are detected or forecast for the wind turbine, the wind turbine blades are pitched such that they will passively align in a substantially horizontal arrangement. The blades can be yawed such that a tip of one of the wind turbine blades points into the wind direction, resulting in a reduced surface area of the blades exposed to the extreme wind forces. This reduced surface area provides for a reduction in the extreme loads which may be experienced by the wind turbine in such extreme wind conditions.

Wind turbine and associated control method

A method of controlling the yawing of two-bladed wind turbine is described. The yaw speed of the turbine is increased when the wind turbine rotor blades are in a substantially vertical position, and the yaw speed may be reduced when the blades are substantially horizontal. By modulating the yaw rate based on the rotational angle of the blades, the effect of the yaw moments on the wind turbine structure is reduced, and the wind turbine may be designed to take into account such reduced forces.

Wind turbine and an associated yaw control method

A two-bladed partial-pitch wind turbine and a method of controlling such a wind turbine during high wind conditions are described. The turbine is operable to pitch the outer sections of the turbine rotor blades during extreme wind conditions (i.e., high wind loads) such that the outer blade sections are substantially orthogonal to the inner blade sections. This arrangement acts to reduce the extreme thrust loading experienced by the wind turbine structure during severe gusts (e.g., during hurricane or typhoon conditions), and accordingly reduces the risk of damage to the wind turbine in such conditions.

Wind turbine and an associated control method

A partial pitch wind turbine is described wherein the wind turbine blade has an inner blade section designed for stall-controlled operation and an outer blade section designed for pitch-controlled operation. The different blade profiles for the different sections allow for the efficient operation of the blade while providing for the control of the wind turbine to effectively reduce blade root moments. The outer blade sections can be pitched out of the wind to reduce root moments due to the outer blade sections, while the increasing power capture of the inner blade section maintains nominal power output.

Wind turbine and wind turbine blade

A method for controlling the position of blades of a two-bladed wind turbine when extreme conditions are detected or forecast for the wind turbine. When extreme conditions are detected or forecast, the wind turbine blades are positioned in a horizontal arrangement, and actively yawed such that a tip of one of the wind turbine blades points into the wind direction. The blades are yawed such as to actively follow the changing wind direction, resulting in a reduced surface area of the blades exposed to the extreme wind forces, due to the spear-like arrangement of the turbine blades. This reduced surface area provides for a reduction in the extreme loads which may be experienced by the wind turbine in such extreme wind conditions.

A wind turbine having at least a blade comprising a first component () having an aerodynamic profile with a leading edge (), a trailing edge () and suction and pressure sides between the leading edge () and the trailing edge () and a second component () attached to the trailing edge () and/or to the leading edge () of the first component () in at least a part of the blade, in which the second component () comprises an upwards and/or downwards deflectable flap () that allows changing the flow over the blade and in which the means for deflecting the flap () comprise a stiff plate () inserted between the first component () and the flap () and stiff plate actuating means ().

Wind turbine blade with cambering flaps

A wind turbine having at least a blade comprising a first component having an aerodynamic profile with a leading edge, a trailing edge, and suction and pressure sides between the leading edge and the trailing edge, and a second component, attached to the trailing edge and/or to the leading edge of the first component in at least a part of the blade. An upwards and/or downwards deflectable flap allows changing the flow over the blade, in which the unit for deflecting the flap is a fluid inflatable unit placed in a flap inner chamber close to the first component and in which the wind turbine comprises a unit for controlling the inflatable unit depending on the wind situation and/or the blade loads.

Wind turbine blade with deflectable flaps

A wind turbine blade () having an aerodynamic profile with a leading edge (), a trailing edge () and suction and pressure sides () between the leading edge () and the trailing edge (), wherein the pressure side () includes a modified zone () shaped for reducing the negative lift coefficient which is done whether attaching a device () such as a stall strip to the blade () or attaching or inserting into the blade () a deformable device and actuator means for providing the shape and size changes in it.

A movable independent crane system for moving or replacing components during maintenance operations and for mounting wind generators, including an auxiliary portal crane providing a portal structure designed to be movable around a pod about a rotation shaft. The mobile independent crane system includes raising devices being part of the crane system and designed to allow self-raising of the crane system because the mobile independent crane system is anchored to the pod through an anchoring unit and because the mobile independent crane system is designed to operate over the pod and outside the pod sides.

Growing community of inventors

Silkeborg, Denmark

Michael Friedrich