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: Indicator device (90), for indicating proper alignment of bolt-and-nut holes of two abutting flanges (72,72?) of two tower sections (2,5) of a wind turbine tower structure (1), the indicator device (90) comprising a connector (122) for connecting the indicator device (90) to an inner face (71) of one of the flanges, and a body (100) having a first body end (101) and an opposite second body end (112) closer to the connector (122), the indicator device (90) including a resiliently deformable part (150), a pneumatic system or a hydraulic system allowing for the indicator device (90) to assume a normal configuration wherein the first body end (101) is distant from the connector (122), and a second configuration wherein the first body end (101) is located closer to the connector (122), the resiliently deformable part or pneumatic system or hydraulic system urging the first body end (101) from the second configuration towards the first configuration.

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: Indicator device (90), for indicating proper alignment of bolt-and-nut holes of two abutting flanges (72,72?) of two tower sections (2,5) of a wind turbine tower structure (1), the indicator device (90) comprising a connector (122) for connecting the indicator device (90) to an inner face (71) of one of the flanges, and a body (100) having a first body end (101) and an opposite second body end (112) closer to the connector (122), the indicator device (90) including a resiliently deformable part (150), a pneumatic system or a hydraulic system allowing for the indicator device (90) to assume a normal configuration wherein the first body end (101) is distant from the connector (122), and a second configuration wherein the first body end (101) is located closer to the connector (122), the resiliently deformable part or pneumatic system or hydraulic system urging the first body end (101) from the second configuration towards the first configuration.

Abstract: A method of damping oscillations in a wind turbine tower comprises connecting a bag of material or liquid to a tower component at a first lateral distance away from a tower wall. The bag is also suspended from the tower component by a first vertical distance. The height of the tower component is known such that the first vertical distance corresponds to a particular height within the tower. The first lateral distance, first vertical distance, and mass of the bag are such that the bag is configured to hit said tower wall during oscillations in said wind turbine tower, in order to damp said oscillations in said wind turbine tower.

Abstract: The present invention relates to wind turbine towers and in particular to such towers having a damper for use when erecting the tower and prior to installing a nacelle on the top of the tower. The invention also relates to a method for damping wind turbine towers.

Abstract: The present invention generally relates to a hollow structural part (2) configured to form part of a wind turbine (1), said structural part (2) having a first end (2?) and a second end, with an inwardly directed annular flange (70) at said first end (2?), said flange (70) having a plurality of holes (72), at least one alignment device (10) being mounted to said hollow structural part (2), a first connector (22) being connected with said structural part (2) to connect said alignment device (10) to said structural part (2), said alignment device (10) having a guide portion (35) with a protracted guiding surface part (38) extending in the general direction away from said opposite second end and towards a centre line (CL) of said hollow structural part (2), said guiding surface part (38) being for directional guiding of another structural part (5) of said wind turbine (1) during assembly thereof, an elongated bar (40) connected with said guide portion (35), said bar (40) having a portion extending from said botto

Abstract: A method of damping oscillations in a wind turbine tower comprises connecting a bag of material or liquid to a tower component at a first lateral distance away from a tower wall. The bag is also suspended from the tower component by a first vertical distance. The height of the tower component is known such that the first vertical distance corresponds to a particular height within the tower. The first lateral distance, first vertical distance, and mass of the bag are such that the bag is configured to hit said tower wall during oscillations in said wind turbine tower, in order to damp said oscillations in said wind turbine tower.

Abstract: The present invention relates to wind turbine towers and in particular to such towers having a damper for use when erecting the tower and prior to installing a nacelle on the top of the tower. The invention also relates to a method for damping wind turbine towers. One aspect of the invention involves a wind turbine tower (2) with an upper tower structure (24) and a damper (5) comprising, —a liquidless damper housing (7,8) fixed to the upper structure, —a cylindrical interior surface of the damper housing, and—a damper mass having a horizontal extent which is less than a horizontal extent of the cylindrical interior surface of the damper housing, and—at least one shock absorbing structure, where the damper mass is arranged to, when the tower oscillates, essentially stay in a standstill location, whereby a relative movement between the tower and the damper mass may cause an impact with between the tower mass and the shock absorbing structure dependent on the magnitude of the amplitude of the tower oscillation.

Abstract: The present invention generally relates to a hollow structural part (2) configured to form part of a wind turbine (1), said structural part (2) having a first end (2?) and a second end, with an inwardly directed annular flange (70) at said first end (2?), said flange (70) having a plurality of holes (72), at least one alignment device (10) being mounted to said hollow structural part (2), a first connector (22) being connected with said structural part (2) to connect said alignment device (10) to said structural part (2), said alignment device (10) having a guide portion (35) with a protracted guiding surface part (38) extending in the general direction away from said opposite second end and towards a centre line (CL) of said hollow structural part (2), said guiding surface part (38) being for directional guiding of another structural part (5) of said wind turbine (1) during assembly thereof, an elongated bar (40) connected with said guide portion (35), said bar (40) having a portion extending from said botto

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 having a wind turbine tower having a tower wall, a wind turbine nacelle positioned on top of the tower and noise reducer for reducing noise emission from the tower. The noise reducer including a beam formed as an elongated strengthening member and one or more dampers, where the dampers are arranged between the tower wall and the beam, the dampers being arranged so that relative movement between the tower wall and the beam results in dissipation of energy via the dampers in order to reduce noise emission. The invention further relates to a method for reducing noise emission from a wind turbine tower.

Abstract: The present invention relates to an arrangement (1) for cable guiding, comprising a first guide member (40) adapted to enclose a first cable (10) along at least a part of the length of said first cable. The first guide member (40) has an outside surface adapted to form at least one first guide surface (41) supporting at least one second cable (20) along at least a part of the length of said first cable. The present invention further relates to a wind turbine comprising such an arrangement and to the use of such an arrangement.

Abstract: The present invention relates to a tower for a wind power installation. The tower comprises a wall extending from a foundation in an upwards direction towards a nacelle and defines an enclosed space. Furthermore, the tower comprises a safety blanket which is distended across the tower interior along an inner surface of the wall to thereby split the enclosed space into an upper compartment above the blanket and a lower compartment below the blanket. The safety blanket is flexible.

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 tower for a wind power installation. The tower comprises a wall extending from a foundation in an upwards direction towards a nacelle and defines an enclosed space. Furthermore, the tower comprises a safety blanket which is distended across the tower interior along an inner surface of the wall to thereby split the enclosed space into an upper compartment above the blanket and a lower compartment below the blanket. The safety blanket is flexible.

Abstract: The present invention relates to a wind turbine (2) comprising a tower (3), a nacelle (4) arranged on top of said tower (3) and a slip ring assembly (1) having at least one slip ring (11), wherein a first cable (6) is extending from the nacelle (4) to the tower (3) via an interior bore (12) of the slip ring assembly (1), and at least one second cable (7a, 7b) is extending from the nacelle (4) to the tower (3) via said at least one slip ring (11), whereby a shielding distance is formed between an outer periphery of said first cable (6) and an inner circumference of said at least one slip ring (11). The present invention further relates to use of a slip ring assembly (1) comprising at least one slip ring (11) for shielding cables (6, 7a, 7b) in a wind turbine (2).

Abstract: The present invention relates to an arrangement (1) for cable guiding, comprising a first guide member (40) adapted to enclose a first cable (10) along at least a part of the length of said first cable. The first guide member (40) has an outside surface adapted to form at least one first guide surface (41) supporting at least one second cable (20) along at least a part of the length of said first cable. The present invention further relates to a wind turbine comprising such an arrangement and to the use of such an arrangement.

Abstract: The invention relates to a wind turbine tower comprising at least two annular tower rings placed vertically on top of each other. The wind turbine tower is characterized in that, a first tower ring overlaps at least a further tower ring of the at least two tower rings. The invention further relates to a wind turbine, a wind turbine tower elevator for use in a wind turbine tower and a method for assembling a wind turbine tower.

Abstract: The invention relates to a wind turbine (1) comprising a wind turbine tower (2) having a tower wall (22), a wind turbine nacelle (3) positioned on top of the tower (2) and noise reducing means (8) for reducing noise emission from the tower (2). The noise reducing means (8) comprises a beam (9) formed as an elongated strengthening member and one or more damping means (20), where the damping means (20) are arranged between the tower wall (22) and the beam (9), the damping means (20) being arranged so that relative movement between the tower wall (22) and the beam (9) result in dissipation of energy via the damping means (20) in order to reduce noise emission. The invention further relates to a method for reducing noise emission from a wind turbine tower (2) and use of a wind turbine (1).