A fully submersible separated fan foundation

Abstract

The invention discloses a full-submersible separation type fan foundation and relates to the technical field of offshore wind power generation. Through the full-submersible separation type fan foundation, influence on a buoy by wave load is directly avoided, and the whole power response of a fan is obviously lowered. The full-submersible separation type fan foundation mainly comprises two parts including a submerging and surfacing type foundation and a fan system. The submerging and surfacing type foundation is composed of a sleeve, a supporting frame, submerging and surfacing drums, tensioning wires and catenaries; the fan system is composed of a fan and a tower drum; the tower drum penetrates through a middle sleeve, capable of realizing floating up and down; the sleeve is fixedly connected with a submerging and surfacing box through the supporting frame; the sleeve, the supporting frame and the submerging and surfacing drums are fixed beneath the ocean surface to form the submerging and surfacing type foundation, serving as a directed supporting seat of the tower drum, through the tensioning wires and the catenaries; and the bottom of the tower drum is connected with a seabed through the tensioning wires. The full-submersible separation type fan foundation is in a completely-new offshore fan foundation structure form and is suitable for building an offshore fan foundation.

Description

technical field [0001] The invention relates to the technical field of offshore wind power generation, in particular to a submersible-floating wind turbine foundation. Background technique [0002] So far, research on floating wind turbines in my country is still in its infancy. The development of offshore wind farms is currently mostly located in shallow seas with a water depth of 0-30 meters, within 20km from the coast, such as Xiangshui Wind Farm, Donghai Bridge Wind Farm, etc., all adopt fixed support foundations. According to the latest offshore wind resource survey results of the China Meteorological Administration, the installed capacity of wind power in my country's offshore areas within the 5m to 25m water depth line and 50m above sea level is about 200 million kW, and the transitional area within 25m to 50m, sea level The installed capacity of more than 70m above is about 500 million kW, and the wind energy resources in the deep sea area above 100m are more abundan...

AI Technical Summary

Problems solved by technology

Wind energy has not been developed and utilized in sea areas above 30 meters deep

Advantages: small waterline area is less affected by wave loads; Disadvantages: underwater structure has a deep draft, a lot of consumables, and is uneconomical. At the same time, the stiffness of the catenary line is not enough for rolling, pitching, and swaying. This structure is not suitable for within 100 meters Development of Wind Energy in Water Areas

Advantages: This form of foundation has a large water surface area, large restoring moment, and good stability; Disadvantages: The large-scale buoy structure is subjected to large wave loads, and the volume of the foundation structure is huge and uneconomical

Advantages: The tension leg floating foundation has good heave and sway characteristics; Disadvantages: The tension leg structure is complicated, expensive, and installation cost is high

[0007] At present, many floating foundations have been applied to wind power generation all over the world, but due to technical limitations, high cost, and complex loading of floating foundations, they have not been vigorously promoted like fixed foundations in shallow seas.

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