Novel self-adaptive vortex suppression control wind turbine tower structure

Abstract

The invention discloses a novel self-adaptive vortex suppression control wind turbine tower structure. The novel self-adaptive vortex suppression control wind turbine tower structure comprises a tower, a cabin fixedly connected with the tower, a hub arranged on the cabin, blades fixedly connected to the hub, a plurality of bearings connected to the tower in a sleeving mode and side plates fixedly connected to the bearings. The tower is fixedly connected with two oppositely-arranged connecting rods, the connecting rods extend into the cabin, and the ends, located in the cabin, of the connecting rods are fixedly connected with tail vanes. According to the invention, the generation of the periodic Karman vortex street is limited, resonance is avoided, the stability of the tower is enhanced, external energy input is not needed, the structure is simple, and the method is simple and feasible.

Description

technical field [0001] The invention relates to the technical field of wind turbine towers, in particular to a novel wind turbine tower structure with adaptive vortex suppression control. Background technique [0002] Wind power generation is currently one of the most mature technologies, the largest development and application scale and the highest commercialization of power generation methods in the utilization of renewable energy. As the key equipment of wind power system, wind turbine plays a vital role in the development of wind power industry. [0003] In recent years, in order to reduce the cost of electricity, the size of the tower / blade of the wind turbine has been increasing, and the load on the tower is also positively correlated with the height of the tower. As the main load-bearing structure of the wind turbine, the safety of the tower is the normal of the wind turbine prerequisite for work. On the other hand, when the fluid bypasses the cylindrical tower, the...

AI Technical Summary

Problems solved by technology

On the other hand, when the fluid bypasses the cylindrical tower, the fluid will periodically fall off from both sides of the tower, forming double-column linear vortices with opposite directions of rotation, and interfering with each other as they move, forming a nonlinear Karman vortex street , when a vortex street occurs, if the frequency of the periodic alternating lateral force generated by the fluid on the tower is close to the natural frequency of the tower, resonance will occur, which will have an adverse effect on the tower, and in severe cases will cause damage to the tower; and due to commercial wind The wind turbines are all concentrated in the wind field with superior wind resources. The vortex wake generated by the upstream wind turbine tower will seriously affect the normal operation of the downstream wind turbine. The speed loss and high turbulence in the wake area will lead to a significant reduction in the output power of the downstream wind turbine. , waste wind energy and land resources, increase the cost of wind power

Images