Offshore wind turbine composite skirt type foundation structure with active control system and construction method

Abstract

The invention relates to an offshore wind turbine composite skirt type foundation structure with an active control system and a construction method. The offshore wind turbine composite skirt type foundation structure comprises a wind turbine tower drum, a transition section tower drum, an inclined leg support and a skirt type suction bucket, a plurality of anchor rods which are uniformly distributed and embedded into a rock layer are annularly arranged on the skirt type suction bucket, prestress is applied to the anchor rods through an anchoring tensioning device mounted on the skirt type suction bucket, and therefore, the skirt type suction bucket is prevented from inclining; and an acceleration sensor and a main control device are installed on the wind turbine tower drum, the acceleration sensor is used for recording the acceleration of the wind turbine tower drum and transmitting a signal to the main control device, the main control device adjusts the pretension of the anchor rods by controlling the anchoring tensioning device after receiving the signal, and the overall stability of the foundation structure is ensured. According to the offshore wind turbine composite skirt type foundation structure with the active control system and the construction method, through an active control technology, the system rigidity and the natural vibration frequency of a wind turbine foundation are adjusted, efficient and stable grid-connected power generation of a wind turbine under the strong wind condition is achieved, the perpendicularity and displacement of the wind turbine are corrected in time, and the power generation efficiency of the wind turbine is improved.

Description

technical field [0001] The invention relates to the field of foundation installation equipment for offshore wind turbines, in particular to a composite skirt foundation structure and construction method for offshore wind turbines with an active control system. Background technique [0002] In recent years, in the face of increasingly severe environmental and resource problems, the development of renewable energy has been paid more and more attention. In my country's energy consumption, traditional fossil energy accounts for a large proportion, energy utilization efficiency is low, and waste and pollution are large. Therefore, it is particularly urgent to develop new renewable energy. Among them, offshore wind power has little impact on the environment, high resource utilization rate, and relatively mature technology. It has developed in recent years. fast. [0003] At present, the pile foundation is widely used in the foundation form of offshore wind turbines. In the seabed ...

AI Technical Summary

Problems solved by technology

When the wind force is small, the natural vibration frequency of the foundation is between 1P frequency and 3P frequency, and the structure is relatively safe; but when the wind force is strong, the 1P frequency is large, or the foundation stiffness becomes smaller under cyclic loads, and the foundation natural vibration frequency may be close to 1P frequency, causing resonance

When a strong typhoon passes by, in order to ensure structural safety, traditional wind turbines reduce their own wind resistance and 1P frequency through the yaw system and blade pitch, so the wind turbines cannot generate power at full power or choose to stop directly, resulting in low working efficiency of wind turbines

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