Composite skirt foundation structure and construction method for offshore wind turbine with active control system

Abstract

The invention relates to a composite skirt-type foundation structure of an offshore fan with an active control system and a construction method, including a fan tower, a transition-section tower, inclined leg supports and a skirt-type suction barrel, and a ring is arranged on the skirt-type suction barrel A number of evenly distributed anchor rods embedded in the rock layer, and prestressing is applied to the anchor rods through the anchor tension device installed on the skirt-type suction bucket to prevent the skirt-type suction bucket from tilting; the wind tower is equipped with an acceleration sensor And the main control equipment, where the acceleration sensor is used to record the acceleration of the wind turbine tower and transmit the signal to the main control equipment. After receiving the signal, the main control equipment adjusts the pre-tension of the anchor rod by controlling the anchor tension device to ensure the overall stability. The invention adjusts the system stiffness and natural vibration frequency of the fan foundation through a set of active control technology, realizes efficient and stable grid-connected power generation of the fan under strong wind conditions, and timely corrects the verticality and displacement of the fan to improve the power generation efficiency of the fan.

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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