A vertical resistance-increasing combined offshore wind turbine support structure system

Abstract

The invention discloses a vertical drag increase combined offshore wind turbine support structure system. The system is based on an existing tension leg type offshore wind turbine support structure and is formed by additionally arranging a Spar cylinder, a vertical drag increase device and a catenary tension key on the existing structure. The support structure is composed of a tower, a float, theSpar cylinder, the vertical drag increase device and the tension key, wherein the variation amplitude of internal force of the tension key during movement of the structure is eliminated through the catenary tension key, and the failure probability of the tension key is lowered; the Spar cylinder is arranged under the tower, and structural construction strengthening and structure gravity center height adjustment can be conducted; and the vertical drag increase device is a drum without a bottom cover and is inverted in water for increasing the vertical damping of the structure, and the influenceof heave on the structure is reduced. The advantages of catenary mooring, the Spar cylinder and the vertical drag increase device are incorporated, and the novel offshore floating type wind turbine support structure system with convenient construction, low failure probability of the tension key and high vertical damping and structural stability.

Description

technical field [0001] The invention relates to a vertical resistance-increasing combined offshore wind turbine support structure system, specifically optimizes and improves the traditional tension leg type offshore wind turbine support structure system, absorbs the Spar tube and the catenary type tension key Advantages, and combined with the vertical resistance increasing device to form a support structure system, this new support structure system can better ensure the safe service of the wind turbine. Background technique [0002] Compared with onshore wind power, offshore wind power has the following unique advantages, such as wide wind field, stable wind force, large wind turbine unit capacity, less restriction by noise standards, saving land resources, and facilitating the realization of scale. Tension Leg Platform Wind Turbine (TLPWT) is evolved from the tension leg platform and is suitable for sea areas with medium water depth. It is fixed by vertical tension key moor...

AI Technical Summary

Problems solved by technology

[0003] 1) The internal force of the vertical tension key is more sensitive to the change of the external load, especially for the change of the lateral load. The internal force of the tension key is easy to increase under the action of the harsh sea conditions and there is a risk of failure. The failure of the tension key must be It will lead to the overall collapse of the wind turbine, therefore, the safety of the tension key will directly affect the service life of the entire wind turbine

[0004] 2) The overall stability of the wind turbine structure is poor

The support structure system of the wind turbine is under the action of large wind, wave, and current loads. Once the tension bond in the tension state fails, the entire structural system will tilt and roll over, and the upper wind turbine will fall into the water and fail.

Moreover, offshore wind turbines are often arranged in large areas to form a wind field. The breaking of a single tension bond will cause the structure to roll over and cause other tension bonds to break successively. The structure will drift without restraint, which will endanger other wind forces in the wind field. machine security

[0005] 3) The phenomenon of heave will occur during the service period of the wind turbine. The occurrence of heave will lead to the change of the tension of the tension bond. The amplitude of the heave is closely related to the change of the tension of the tension bond. Failure probability affects the normal service of wind turbines, so controlling and mitigating the impact of heave is also an effective measure to improve the service life of wind turbines

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