Abstract: A wind turbine tower configured to support a wind turbine nacelle and a rotor, and with a tower wall of an inner surface and an outer surface. The tower is tethered by a number of cables, each cable extending between a first end anchored to an anchoring element and an opposite, second end attached to the tower at an attachment element. Two cables extending from two different anchoring elements are attached to the tower such that longitudinal projection lines from the second ends of the two cables converge at a convergence point, which lies at a location at a certain height and inside the tower wall thickness. Alternatively, the convergence point lies inside the tower within a distance of three wall thicknesses from the wall inner surface as measured at the height and in a direction perpendicular to the central longitudinal axis of the tower.

Abstract: The present invention provides a foundation for a wind turbine. To reduce set-up time and to allow complete alignment of the platform which carries the base flange of the tower construction, the invention provides a foundation with a cage structure having an upper stress distribution flange connected by a plurality of tensioned anchor bolts to a lower flange. The flanges are separated by a number of distance elements whereby the shape of the cage structure becomes fixed by the combination between tensioned bolts and distance elements. Since the cage structure has a fixed shape, the upper stress distribution flange can be aligned before the cage structure is embedded in concrete, and it becomes unnecessary to wait for the concrete to harden.

Abstract: A method of mounting elements in a wind turbine tower, whereby the elements are partly or completely attached to the wind turbine tower by means of magnetic attraction forces. Wind turbine suspension units may be attached to the wind turbine tower, preferably completely or partly to the inner wall by means of magnetic attraction forces, which present structure-weakening attachments to the tower or part of the tower.

Abstract: The invention provides a method of laying a foundation of a tower construction which comprises a base flange. The method comprises the steps of: providing a number of anchor rods, providing a ring-shaped formwork, arranging the anchor rods in a pit in the ground, arranging the formwork in engagement with the anchor rods so as to be supported thereby, casting a concrete element, casting a second casting layer in a groove in the concrete element, the groove being provided by the formwork, lowering the base flange onto the second casting layer, and fixing the base flange to the concrete element.

Abstract: A method of mounting elements in a wind turbine tower, whereby the elements are partly or completely attached to the wind turbine tower by means of magnetic attraction forces. Wind turbine suspension units may be attached to the wind turbine tower, preferably completely or partly to the inner wall by means of magnetic attraction forces, which present structure-weakening attachments to the tower or part of the tower.

Abstract: The present invention relates to a wind turbine tower suspension arrangement comprising magnetic attachment means adapted to magnetically secure the suspension arrangement to an inner surface portion of the wind turbine tower. The suspension arrangement further comprises guiding means adapted to guide an element suspended in a substantially longitudinal direction of the wind turbine tower, the guiding means being connected to the magnetic attachments means. Moreover, the present invention relates to the method for applying a wind turbine tower suspension arrangement.

Abstract: The present invention relates to a wind turbine including a tower, a nacelle arranged on top of the tower and a slip ring assembly having at least one slip ring, wherein a first cable is extending from the nacelle to the tower via an interior bore of the slip ring assembly, and at least one second cable is extending from the nacelle to the tower via the at least one slip ring, whereby a shielding distance is formed between an outer periphery of said first cable and an inner circumference of the at least one slip ring. The present invention further relates to use of a slip ring assembly comprising at least one slip ring for shielding cables in a wind turbine.

Abstract: The invention provides a method of laying a foundation (2) of a tower construction (3) which comprises a base flange (4). The method comprises the steps of: providing a number of anchor rods (9), providing a ring-shaped formwork (1), arranging the anchor rods (9) in a pit in the ground, arranging the formwork (1) in engagement with the anchor rods (9) so as to be supported thereby, casting a concrete element (5), casting a second casting layer in a groove (8) in the concrete element, the groove (8) being provided by the formwork (1), lowering the base flange (4) onto the second casting layer, and fixing the base flange to the concrete element.

Abstract: The present invention relates to a wind turbine tower suspension arrangement comprising magnetic attachment means adapted to magnetically secure the suspension arrangement to an inner surface portion of the wind turbine tower. The suspension arrangement further comprises guiding means adapted to guide an element suspended in a substantially longitudinal direction of the wind turbine tower, the guiding means being connected to the magnetic attachments means. Moreover, the present invention relates to the method for applying a wind turbine tower suspension arrangement.

Abstract: Embodiments of the invention provide a foundation for a wind turbine. The foundation includes a section which is partly embedded in a concrete section and a cover which is arranged across an intersection between the embedded section and the concrete section. In that way, intrusion of water between the sections can be prevented effectively, and the lifetime of the foundation can be increased and/or the maintenance costs can be reduced. A method of making a foundation for a wind turbine and a wind turbine with the foundation are also disclosed.

Abstract: The present invention relates to a method for damping oscillations in a wind turbine comprising a wind turbine tower, a nacelle arranged on top of said wind turbine tower, and a number of rotor blades rotatably connected to the nacelle. The oscillations to be damped originate from forces induced on the nacelle and the wind turbine tower by the rotating rotor blades. The method comprises the steps of providing an internally suspended pendulum mass structure being operationally connected to an upper tower section, providing a platform being fixedly attached to the upper tower section, and providing damping means comprising one or more friction members being displaceably arranged relative to the platform, the one or more friction members being adapted to be displaced relative to the platform in response to relative movements between the suspended pendulum mass structure and the platform in order to dissipate energy from the suspended pendulum mass structure by friction.

Abstract: Embodiments of the invention provide a foundation for a wind turbine. The foundation includes a section which is partly embedded in a concrete section and a cover which is arranged across an intersection between the embedded section and the concrete section. In that way, intrusion of water between the sections can be prevented effectively, and the lifetime of the foundation can be increased and/or the maintenance costs can be reduced. A method of making a foundation for a wind turbine and a wind turbine with the foundation are also disclosed.

Abstract: A method of mounting elements in a wind turbine tower, whereby the elements are partly or completely attached to the wind turbine tower by means of magnetic attraction forces. Wind turbine suspension units may be attached to the wind turbine tower, preferably completely or partly to the inner wall by means of magnetic attraction forces, which present structure-weakening attachments to the tower or part of the tower.

Abstract: The invention relates to a wind turbine tower suspension arrangement including at least one first member including magnetic attachment means and at least one further mechanical member mechanically coupled to the first member by at least one coupling means, the coupling means providing at least one degree of freedom between the magnetic attachment means and the at least one further member. According to an embodiment of the invention, mutually displacement in at least direction may be absorbed or damped without transferring the invoking force into the magnetic attachment means.