Abstract: The invention relates to a device (100), a system (10) and a method for modifying the cross section of a tower section (1) of a wind turbine, wherein the tower section comprises a flange (4) located at an end (3) of the tower section having a plurality of through holes (5) spaced around its circumference for securing said tower section to another wind turbine section. The method comprises securing tensioning mechanism (14) to each of a pair of said plurality of through holes in the flange of the tower section, said pair of holes being generally opposed; and applying a tensile force between said pair of holes in the flange of the tower section.

Abstract: The invention relates to a method of installing rotor blades (5) on an offshore wind turbine (2). The method comprises arranging a tower (1) of the wind turbine at an offshore installation site. Then a first end (6) of a tensioner (7) is fastened to at least one of the tower (1), the nacelle (3), and the hub (4) at a distance above sea level. A second end (8) of the tensioner is fastened to a holding device (9,15) floating in the sea at a distance from the tower. Then a pulling force (F) is applied to the tensioner from the holding device at least part of the time while the rotor blades are being mounted to the hub, so that oscillations (M) of the tower due to external forces are dampened during installation of the rotor blades.

Abstract: An assembly, installation package and method for installing a wind turbine tower. The assembly (139) comprises an installation unit (114) having unit guides (140), each configured to engage a corresponding engagement guide (130) adjacent to an upper inner edge of the tower section (110) to guide the assembly while it is lowered into the tower section. The assembly also includes a yoke (136) releasably connected to the installation unit and comprising yoke guides (146), each configured to engage a corresponding engagement guide (130) adjacent to the upper inner edge of the tower section to guide the assembly while it is lowered into the tower section (110). The assembly (139) is configured such that at least one of the unit guides (140) and/or the yoke guides (146) is or are substantially continuously engaged with the engagement guides (130) from when the assembly (139) enters the tower section (110) until the assembly reaches its installation position within the tower section.

Abstract: An assembly, installation package and method for installing a wind turbine tower. The assembly (139) comprises an installation unit (114) having unit guides (140), each configured to engage a corresponding engagement guide (130) adjacent to an upper inner edge of the tower section (110) to guide the assembly while it is lowered into the tower section. The assembly also includes a yoke (136) releasably connected to the installation unit and comprising yoke guides (146), each configured to engage a corresponding engagement guide (130) adjacent to the upper inner edge of the tower section to guide the assembly while it is lowered into the tower section (110). The assembly (139) is configured such that at least one of the unit guides (140) and/or the yoke guides (146) is or are substantially continuously engaged with the engagement guides (130) from when the assembly (139) enters the tower section (110) until the assembly reaches its installation position within the tower section.

Abstract: An alignment tool for the alignment of a pair of vertical flanges for the connection of the longitudinal edges of adjacent segments of a cylindrical section of a wind turbine tower, comprises mounting means for connecting the alignment tool to a portion of a vertical flange of a tower segment; and a longitudinal alignment head for aligning the vertical flange with an opposing vertical flange of an adjacent tower segment. The alignment head comprises a front portion extending in a forwards direction from the mounting means, the front portion comprising a lower guiding surface adapted to abut with a top guiding edge of the opposing vertical flange or a bracket or tool mounted thereon and to guide the alignment head over the top edge of the opposing flange, bracket or tool as the vertical flanges are brought towards each other during connection of the adjacent tower segments.

Abstract: A method for moving a wind turbine component (42) relative to a wind turbine (16) having a tower (18) with a door (26) for closing off an opening (90) through the tower (18) includes removably positioning a transport system (40) relative to the wind turbine (16), the transport system (40) having a track (44) and a powered drive device (118), such that a first end (78) of the track (44) is positioned outside the tower (18), a second end (80) of the track (44) is positioned inside the tower (18), and the track (44) extends through the opening (90) in the tower (18). The transport system (40) is configured to facilitate movement of the wind turbine component (42) between an inside of the tower (18) and an outside of the tower (18) through the opening (90). The method further comprises moving the wind turbine component (42) vertically within the tower (18) away from or toward the track (44) using the powered drive device (118) of the transport system (40).

Abstract: A method for moving a wind turbine component (42) relative to a wind turbine (16) having a tower (18) with a door (26) for closing off an opening (90) through the tower (18) includes removably positioning a transport system (40) relative to the wind turbine (16), the transport system (40) having a track (44) and a powered drive device (118), such that a first end (78) of the track (44) is positioned outside the tower (18), a second end (80) of the track (44) is positioned inside the tower (18), and the track (44) extends through the opening (90) in the tower (18). The transport system (40) is configured to facilitate movement of the wind turbine component (42) between an inside of the tower (18) and an outside of the tower (18) through the opening (90). The method further comprises moving the wind turbine component (42) vertically within the tower (18) away from or toward the track (44) using the powered drive device (118) of the transport system (40).

Abstract: Tooling and a method of using the tooling for aligning flanges of a wind turbine tower segment of a tower section to correct deformities that might otherwise prevent fasteners from passing through apertures of adjacent flanges to gather the segments into tower sections.

Abstract: A wind turbine tower (10) with a guide system for guiding an internal installation unit (20) displaced relative to the inside of said tower (10) to a final mounting position inside said tower (10), said tower (10) having a first end (3) and an opposite second end (5), said first end (3) defining an entry opening for receiving said unit (20), said guide system comprising at least two parallel stays (32) for said guiding being mounted to the inside of the wall (8) of said tower (10) and extending from said first end (3) towards said second end (5), and engagement elements (35) mounted externally on said unit (20), said engagement elements (35) being configured for receiving a respective one of said stays (32).

Abstract: Tooling and a method of using the tooling for aligning flanges of a wind turbine tower segment of a tower section to correct deformities that might otherwise prevent fasteners from passing through apertures of adjacent flanges to gather the segments into tower sections.

Abstract: The application relates to an alignment tool (200) for the alignment of a pair of vertical flanges for the connection of the longitudinal edges of adjacent segments of a cylindrical section of a wind turbine tower, and to a system and method utilising one or more such alignment tools (200). The alignment tool comprises mounting means (202) for connecting the alignment tool to a portion of a vertical flange of a tower segment; and a longitudinal alignment head (204) for aligning the vertical flange with an op posing vertical flange of an adjacent tower segment.

Abstract: A wind turbine tower (10) with a guide system for guiding an internal installation unit (20) displaced relative to the inside of said tower (10) to a final mounting position inside said tower (10), said tower (10) having a first end (3) and an opposite second end (5), said first end (3) defining an entry opening for receiving said unit (20), said guide system comprising at least two parallel stays (32) for said guiding being mounted to the inside of the wall (8) of said tower (10) and extending from said first end (3) towards said second end (5), and engagement elements (35) mounted externally on said unit (20), said engagement elements (35) being configured for receiving a respective one of said stays (32).