Semi-submersible type offshore floating wind turbine foundation

Abstract

The invention provides a semi-submersible type offshore floating wind turbine foundation, comprising three square vertical posts, a circular vertical post and a bottom pontoon, wherein each of the three square vertical posts is of a hollow structure and internally provided with a reinforcing member; the three square vertical posts are arranged at equal intervals in a regular triangle manner; the circular vertical post is arranged in the center position of the regular triangle formed by the three square vertical posts; a top flange of the circular vertical post is connected with a tower bottom flange of a tower of a floating wind turbine; the bottom pontoon is Y-shaped; three far ends of the bottom pontoon are respectively connected to the lower parts of the three square vertical posts; and the bottom end of the circular vertical post is arranged in the center position of the bottom pontoon.

Description

technical field [0001] The invention belongs to the field of wind power generation, and relates to an offshore floating wind turbine foundation with excellent comprehensive performance. Background technique [0002] In the deep sea area far away from the mainland, there are many high-quality wind resources that can be developed and utilized, and the market prospect is broad. To develop these deep-sea wind farms with a water depth of more than 50 meters, it is not advantageous to fix the various through-pile structures on the seabed according to the current offshore wind farms. This is because: as the water depth increases, the cost of fixed foundations rises linearly; The construction cost of fixed offshore wind turbines (referred to as wind turbines) is higher than that of floating offshore wind turbines. Therefore, in order to enable the construction of offshore wind farms to develop into deep sea areas, it is necessary to develop economical and practical floating wind tu...

AI Technical Summary

Problems solved by technology

However, the semi-submersible floating fan is installed on one of the buoys, and the gravity load acting on the foundation is asymmetrical. It is necessary to adjust the ballast in the three buoys to offset this part of the load, but in the actual operation of the fan, the wind direction will vary. If the wind turbine changes, the direction of the wind inclination moment on the entire fan will change, and the amount of ballast water needs to be dynamically adjusted. This requires higher requirements for the control strategy of the fan and the ballast pump, and the design is difficult and costly. Moreover, the structural form There are many pipe joints, which have a great influence on the fatigue life of the structure

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