Three-stand-column semi-submersible type offshore wind turbine foundation

Abstract

The invention provides a three-stand-column semi-submersible type offshore wind turbine foundation which serves offshore wind energy development. The three-stand-column semi-submersible type offshorewind turbine foundation comprises three vertical stand columns arranged in a triangular shape, the overwater height of the stand columns is about 1 / 3-1 / 4 of the total height of the foundation, a winddriven generator is mounted at the top of the main stand column, the underwater bottom end of the main stand column is connected with the two peripheral secondary stand columns through floating barrels, and the included angle between the two floating barrels ranges from 60 degrees to 90 degrees. The structural style is simple, and the force transferring route is clear. The stand columns are hollow, and stiffening ribs and ballast cabins are arranged. Anchor gears are arranged on decks of the three stand columns, fair leads are fixed to column bodies, and tension ribs are connected with external ballast on the seabed. The contact degree of the externally hung ballast and the seabed, the inclination angle of a fan-foundation system is controlled, and efficient wind energy collection is guaranteed. A braced chain is adopted by the foundation for mooring, and connected with a pull type anchor on the seabed.

Description

technical field [0001] The invention belongs to the field of wind power generation and relates to an offshore floating wind turbine foundation. Background technique [0002] The gradual depletion of land wind resources has shifted human attention to a new direction of clean energy—offshore wind power. Offshore wind power has the advantages of high wind speed, large power, stable operation, and is suitable for large-scale development. Moreover, the southeast coastal areas with the most abundant offshore wind energy resources are adjacent to economically developed areas with large demand for electricity, which can realize nearby consumption of electricity and reduce transportation costs. , great potential for development. It is estimated that the energy efficiency of offshore wind energy resources is 20% to 40% higher than that of onshore wind power. [0003] For deep-water marine environments with a water depth greater than 40 meters, the basic economy of floating wind turb...

AI Technical Summary

Problems solved by technology

[0018] In order to solve the problem of offshore wind energy utilization at a water depth of 40 meters to 200 meters, the present invention provides a three-column semi-submersible offshore wind turbine foundation, which has a simple structure and clear force transmission path, and can be constructed with high-strength steel or cast-in-place high-strength concrete. It is suitable for construction and assembly in shallow water ports on the shore, and can support the current mainstream wind turbines above 5MW level, ensuring normal operation, structural strength and wind energy conversion efficiency under the limit of self-storage

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