Leveling arrangement for a tower

1. A leveling arrangement for a tower, the leveling arrangement having a leveling ring configured to be placed between a tower foundation and the tower, and a leveling apparatus, the leveling apparatus comprising:

a connection means for detachably connecting the leveling apparatus to the leveling ring during a leveling procedure; and

a plurality of adjustment legs, the plurality of adjustment legs being vertically extendable, wherein the plurality of adjustment legs are configured to effect a displacement of the leveling ring relative to the tower foundation during the leveling procedure by at least one of extending and retracting in a vertical direction.

2. A leveling arrangement according to claim 1 , wherein the plurality of adjustment legs comprise a foot for resting on the foundation and a gripper for gripping the leveling apparatus.

3. A leveling arrangement according to claim 1 , wherein the plurality of adjustment legs comprises three adjustment legs.

4. A leveling arrangement according to claim 1 , wherein the plurality of adjustment legs include a height adjustment means for effecting the displacement of the leveling ring relative to the tower foundation.

5. A leveling arrangement according to claim 1 , wherein the leveling apparatus comprises a cylindrical body, wherein the plurality of adjustment legs are connected directly to the cylindrical body by one or more gripper elements.

6. A leveling arrangement according to claim 1 , wherein the connection means of the leveling apparatus for detachably connecting to the leveling ring comprises a flange with an annular arrangement of through-holes.

7. A leveling arrangement according to claim 6 , wherein the annular arrangement of through-holes of the leveling ring corresponds to a tower flange annular through-hole arrangement.

8. A leveling arrangement according to claim 1 , wherein the leveling ring comprises a plurality of leveling ring segments.

9. A leveling arrangement according to claim 1 , comprising an offset detector for detecting an offset between an actual position of the leveling ring and a desired position of the leveling ring, wherein the offset detector communicates with a controller to actuate the plurality of adjustment legs.

10. A method of providing a level mounting interface for a tower, the method comprising:

detachably connecting a leveling ring to a leveling apparatus;

arranging the leveling apparatus over a tower foundation;

operating the leveling apparatus to vertically extend or retract at least one of a plurality of adjustment legs of the leveling apparatus to effect a displacement of the leveling ring relative to the tower foundation until the leveling ring presents an essentially level mounting surface;

bonding the leveling ring to the tower foundation; and

disconnecting and removing the leveling apparatus from the leveling ring.

11. A method according to claim 10 , wherein the step of arranging the leveling apparatus over the tower foundation comprises mating the leveling ring with a plurality of anchor bolt connectors protruding from the tower foundation.

12. A method according to claim 10 , wherein the step of bonding the leveling ring to the tower foundation comprises filling any spaces between the leveling ring and the tower foundation with a grout layer.

13. A method according to claim 12 , wherein the grout layer comprises a low strength grout material.

14. A method of erecting a wind turbine tower, the method comprising:

providing a level mounting interface for the wind turbine tower using the method according to claim 10 , the level mounting interface comprising a leveling ring connected to a tower foundation and a plurality of connectors protruding through the leveling ring; and

connecting a lower tower flange to the connectors of the level mounting interface.