Wind turbine tower transition piece

Abstract

A transition piece (140) for a wind turbine tower (110) is provided, that is configured to be installed on a tower foundation (111) and to carry a tower piece (113). The transition piece comprises a high voltage joint (10) with grid input and output terminals (11, 12) and WTG connecting input and output terminals (14, 13). The grid input terminal (11) is configured for receiving and connecting to an array cable (21) from a power grid (20). The WTG connecting output terminal (13) is operatively connected to the grid input terminal (11) for receiving and connecting to an input cable (23) leading to a switchgear (30). The WTG connecting input terminal (14) is configured for receiving and connecting to an output cable (24) from the switchgear (30). The grid output terminal (12) is operatively connected to the WTG connecting input terminal (14) for receiving and connecting to an array cable (22) leading to the power grid (20). Further, installation, testing, connecting and maintenance methods taking advantage of the high voltage joint (10) are provided.

Description

technical field [0001] The present invention relates to a transition piece for a wind turbine tower configured to be mounted on a tower foundation and to carry tower elements. The invention also relates to a wind turbine tower, a wind turbine, a method of installing a wind turbine, a method of testing an electrical grid for connecting a plurality of wind turbines, and a method of connecting at least two wind turbines to approach to the same grid. Background technique [0002] The use of wind power to generate electricity has increased significantly over the past few decades. At the same time, the wind turbines and their blades become taller, further increasing the electrical output of each wind turbine. Many of the larger rotors are installed in offshore wind turbine parks, where they experience higher wind speeds and generally interfere less with public view. Depending on the depth of water in which the wind turbine is installed, the wind turbine may have an underwater f...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this approach is that expensive and sensitive switchgear exists while the heavy construction work is still going on and will be exposed to the offshore environment for a period of time

Also, when the switchgear is installed with the transition piece, it will not be available for onshore testing and preparation of the wind turbine prior to transporting the wind turbine to the location where it will be deployed

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