Offshore wind turbine generator floating type foundation of grating type structure and construction method

Abstract

The invention provides an offshore wind turbine generator floating type foundation of a grating type structure and a construction method. The offshore wind turbine generator floating type foundation comprises a wind turbine generator cabin, wind turbine generator blades, a tower drum and an anchoring system, and the floating type foundation is provided with a grating type sector ring foundation, a center stand column and a lower water pressing plate. The grating type sector ring foundation is composed of a plurality of steel cabins with sector ring-shaped outer contours, the grid grating sector ring foundation surrounds the center stand column, and the center stand column and the grating type sector ring foundation are connected through a connecting structure; and the lower water pressing plate is mounted at the bottom of the floating foundation. Compared with a traditional floating type foundation, the floating type foundation has better hydrodynamic motion performance and higher stability.

Description

technical field [0001] The invention relates to a floating foundation of an offshore wind turbine with a grid structure, which is suitable for the field of offshore wind power development and has a wide range of water depth applications. Background technique [0002] The concept of offshore floating wind farms was first proposed in 1972. In the engineering field, it is generally believed that when the water depth exceeds 60 meters, the economic cost and engineering practicality of floating wind turbines will be better than fixed-based offshore wind turbines. At present, the application of floating wind turbines in offshore wind power is still in the exploratory stage. However, floating drilling platforms have been used for decades in the offshore oil and gas industry. The successful experience of the offshore oil and gas industry not only shows that the long-term operation of floating wind turbines is technically feasible, but also provides a variety of optional foundation...

AI Technical Summary

Problems solved by technology

However, a large number of research and project reports show that these floating foundations still have many problems in the application of offshore wind power development: the waterline of the single-column foundation contributes little to the stability, and the damping when rotation occurs is small, and its roll and The pitching motion is relatively large; in addition, its large main scale has high requirements for water depth, and its construction and installation are also difficult

The installation cost of the mooring system of the tension leg foundation is high, the water depth is shallow, the pretension of the tension tendon is greatly affected by the current and tide, and the frequency coupling between the upper structure and the mooring system is prone to resonance motion; Sensitive, prone to ringing phenomenon, and the tension tendons are prone to fatigue, high risk

Relatively speaking, the semi-submersible foundation has good stability and wide application water depth due to its large water surface area, but its relatively high construction cost

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