Search

EP-3879094-B1 - WIND TURBINE

EP3879094B1EP 3879094 B1EP3879094 B1EP 3879094B1EP-3879094-B1

Inventors

  • PEDERSEN, Frederik Sig
  • Rasmussen, Anders Nygaard
  • Gagein, Amandeep
  • NARANG, Pankaj
  • Sendwal, Vipin

Dates

Publication Date
20260506
Application Date
20200309

Claims (14)

  1. A wind turbine (1), comprising a nacelle (3), a tower (4), a foundation (14), a transition piece (15), which is arranged between the tower (4) and the foundation (14) and which connects the tower (4) to the foundation (14), a platform (19), which is arranged inside the transition piece (15), a service lift (31) for transporting technicians from the platform (19) to the nacelle (3), wherein the service lift (31) can be lowered to the platform (19), and a permanent working platform (32) which is arranged below the platform (19) and in a distance (d) thereof, wherein the working platform (32) comprises a service space (39) positioned below the service lift (31) for mounting and/or maintaining the service lift (31) and to provide access below the service lift (31) for accessing a bottom of the service lift (31).
  2. The wind turbine according to claim 1, wherein the distance (d) is between 2 m and 3 m, preferably 2.5 m.
  3. The wind turbine according to claim 1 or 2, further comprising a plurality of support beams (22 - 27) which run along a longitudinal direction (L) of the tower (4), wherein the platform (19) and the working platform (32) are both attached to the support beams (22 - 27).
  4. The wind turbine according to claim 3, wherein the support beams (22 - 27) are connected to a flange (17) of the transition piece (15).
  5. The wind turbine according to claim 3 or 4, wherein the platform (19) is supported by means of a first support structure (44), wherein the working platform (32) is supported by means of a second support structure (46), and wherein the first support structure (44) and the second support structure (46) are both connected to the support beams (22 - 27).
  6. The wind turbine according to one of claims 3 - 5, further comprising a platform arrangement (18) which is suspended in the transition piece (15), wherein the platform arrangement (18) comprises the platform (19), the working platform (32) and the support beams (22 - 27).
  7. The wind turbine according to one of claims 1 - 6, wherein the platform (19) and the working platform (32) are attached to a wall (42) of the transition piece (15).
  8. The wind turbine according to one of claims 1 - 7, further comprising a switch gear (21) which is arranged on the platform (19).
  9. The wind turbine according to claim 8, wherein the working platform (32) has an elevated working section (48) which is arranged below the switch gear (21).
  10. The wind turbine according to claim 9, wherein the working section (48) is elevated 100 mm to 500 mm, preferably 300 mm, above the working platform (32).
  11. The wind turbine according to one of claims 1 - 10, wherein the platform (19) comprises a centrally arranged hatch (43) which can be opened and closed.
  12. The wind turbine according to one of claims 1 - 11, wherein the working platform (32) comprises openings (40, 41) for pulling in array cables.
  13. The wind turbine according to one of claims 1 - 12, wherein the working platform (32) has a circular shape.
  14. The wind turbine according to one of claims 1 - 12, wherein the working platform (32) has a semi-circular shape.

Description

The present invention relates to a wind turbine. A wind turbine has a tower, a nacelle, which is arranged on top of the tower, a hub with rotor blades being rotatable supported at the nacelle and a generator being provided inside the nacelle and being driven by the hub. Inside the tower can be arranged electrical equipment like a switch gear or a service lift which can be arranged on a switch gear platform. According to internal knowledge of the applicant, there can be provided a temporary scaffold below the switch gear platform to get access to the electrical equipment. US 2019/0249647 A1 describes a transition piece for a wind turbine for connecting a wind turbine to a foundation, wherein the transition piece includes a connection area to be connected to the foundation. EP 3 438 449 A1 describes a self-supporting support structure for wind turbine equipment. The support structure can be accommodated in a hollow transition piece for connecting a tower of an offshore wind turbine to a foundation pile, or in a foundation pile itself. The support structure comprises two or more floors placed vertically above each other and supported by upright supports. At least one floor connects substantially fittingly to an internal peripheral wall of the transition piece or the foundation pile, and said floor is provided with means for reducing its surface area, for instance foldable edge parts. EP 3 502 353 A1 describes a foundation building system for an offshore wind turbine, whereby a monopile to be placed on the seabed, having an upper portion with a first attachment interface for attaching a foundation platform unit, at least one internal, second attachment interface in an interior cavity of the monopile for attaching at least one electrical platform unit, and a third attachment interface for attaching a tower of the offshore wind turbine atop the at least one electrical platform unit, wherein the upper portion is to be placed at least partly above sea level, the foundation platform unit providing at least one foundation platform extending around the tower when installed, and the at least one electrical platform unit comprising at least one platform for electrical equipment for guiding and/or connecting of an connection cable for connecting the offshore wind turbine. EP 3 546 742 A1 describes a tower assembly for a wind turbine including a tower and a freestanding internal tower structure assembly. The tower has a tower wall defining an inner surface and an outer surface separated by a tower wall thickness, with the inner surface defining a tower interior. The internal tower structure assembly is positioned within the tower interior. The tower structure assembly includes a plurality of stackable support structures configured to support one or more internal tower components. Further, the tower structure assembly is freestanding within the tower interior. EP 3 690 235 A1 describes a lifting apparatus for an offshore wind turbine comprising a lift and a plurality of wires and tensioners. The lift can be moved between an upper end and a bottom of a tower of the wind turbine. Using another configuration, it permits to move the lift to another platform within a transition piece, connecting the tower with a foundation. It is one object of the present invention to provide an improved wind turbine. Accordingly, a wind turbine, according to claim 1 is provided, comprising a tower, a foundation, a transition piece, which is arranged between the tower and the foundation and which connects the tower to the foundation, a platform, which is arranged inside the transition piece, a service lift, which can be lowered to the platform, and a permanent working platform, which is arranged below the platform and in a distance thereof, is provided. The wind turbine has a service lift for transporting technicians from the platform to the nacelle. The working platform comprises a service space positioned below the service lift for mounting and/or maintaining the service lift and to provide access below the service lift for accessing a bottom of the service lift. Due to the permanent working platform, the service lift is easily accessible from below. The labor- and cost-intensive installation of a temporary scaffold below the platform is expendable. Advantageously, the working platform can also be used for array cable installation. The wind turbine comprises a nacelle that is mounted on or at the tower. Rotor blades are connected to a hub that is supported at the nacelle. A generator is placed inside the nacelle. The generator is connected to the hub. The generator is coupled to a switch gear. The switch gear is supported inside the transition piece. The foundation is preferably mounted in the seabed. Preferably, the tower comprises a plurality of tower sections that are stacked on each other and that are connected to each other. A lowest tower section is connected to the transition piece. The nacelle is supported by means of a topmost tower