Wind turbine and method for constructing a wind turbine

1. A wind turbine comprising:

a tower;

a tower adapter attached to the tower; and

a nacelle attached to the tower adapter, wherein the tower adapter houses at least one electrical device of the wind turbine for conditioning or switching power provided by a generator of the wind turbine;

wherein the tower adapter is connected to the tower by a slip joint or a flange connection, and when connected to the tower, the tower adapter forms an external wall structure of the wind turbine from the tower to the nacelle.

2. The wind turbine according to claim 1 , wherein a switch gear and/or a converter and/or a transformer are housed in the tower adapter as electrical equipment.

3. The wind turbine according to claim 1 , wherein the wind turbine comprises at least one power cable for transferring the power generated by the generator to an external facility and/or a communication cable for communication with the external facility, further wherein the power cable and/or the communication cable terminate in the tower adapter or in a connector that is attached to the tower and connected to a further cable that is connected to at least one electrical device housed in the tower adapter.

4. The wind turbine according to claim 3 , wherein the tower comprises a cable holder below the tower adapter for holding the power and/or communication cable prior to the installation of the tower adapter.

5. The wind turbine according to claim 1 , wherein the tower comprises a service platform below the tower adapter that is accessible via an opening in the tower adapter.

6. The wind turbine according to claim 1 , further comprising an opening connecting the nacelle to the tower adapter.

7. The wind turbine according to claim 1 , wherein the tower adapter further houses a battery back-up device and/or cooling equipment and/or a cable support to support the power and/or communication cable and/or a controller and/or a tower adapter platform.

8. The wind turbine according to claim 1 , wherein the tower adapter houses an insert module comprising at least two tower adapter platforms connected by a connection element, further wherein at least one of the tower adapter platforms carries the electrical device or at least one of the electrical devices.

9. A method for constructing a wind turbine, wherein a tower adapter that is connected to a nacelle of the wind turbine and that houses at least one electrical device of the wind turbine for conditioning or switching power provided by a generator of the wind turbine is attached to a provided tower of the wind turbine, further wherein the tower adapter is connected to the tower by a slip joint or a flange connection, and when connected to the tower, the tower adapter forms an external wall structure of the wind turbine from the tower to the nacelle.

10. The method according to claim 9 , wherein the wind turbine is an offshore wind turbine, and the electrical device or devices installed in the tower adapter are tested onshore before transferring the tower adapter to the offshore location of the tower.

11. The method according to claim 9 , wherein at least one power and/or communication cable is pre-installed in the tower and connected to a connector of the tower adapter after the tower adapter is mounted to the tower.

12. The method according to claim 9 , wherein multiple power and/or communication cables are pre-installed in the tower and connected to a common connector attached to the tower prior to the mounting of the tower adapter on the tower, wherein multiple further cables attached to the electrical devices, especially to a switch gear, are connected to the common connector after the tower adapter is mounted to the tower.