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System for controlling wind turbine power, consisting in varying the coefficient and size of the swept areas

A technology of wind turbines and control systems, applied in the direction of wind turbines, control of wind turbines, engines, etc., to achieve the effect of less space

Inactive Publication Date: 2007-07-18
ESDRAS AUTOMATICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, stall control represents a very complex aerodynamic design problem, and its associated design challenges the structural dynamics of the entire wind turbine

Method used

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  • System for controlling wind turbine power, consisting in varying the coefficient and size of the swept areas
  • System for controlling wind turbine power, consisting in varying the coefficient and size of the swept areas
  • System for controlling wind turbine power, consisting in varying the coefficient and size of the swept areas

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Embodiment Construction

[0025] This system can be applied to wind turbines with one, two or more blades. Figure 3 is a hybrid model of single-bladed and three-bladed wind turbines. Its main blade has two blade segments S1 and S2, and its swept zone areas are A1 and A2, respectively. They form a pair of dynamic blade segments, the cover segment S2 can slide over the S1 segment. S1 is a support structure with a low aerodynamic profile. The movement from the coupling structure of the S2 segment to the S1 segment is generated by the motor drive, or the power transmission is carried out through the cable at other positions. Segment S1 acts as a support structure and guide for movement. Motor rotation is converted to linear motion on the guide. In this way segment S2 can move on the guide. Another option is to use electric linear actuators or hydraulic cylinders. In these cases, the actuator moves along the S1 segment. The moving head of the actuator is attached to the coupling structure of the S2 s...

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Abstract

The invention relates to a system for controlling the power of wind turbines, comprising the active dynamic modification of the power coefficient and the size of the swept areas. According to the invention, at low wind speeds, the turbine operates with the maximum swept areas and with high power coefficients. At high wind speeds, the swept areas (A) are reduced by means of relative movements between the blade segments (S) that form dynamic pairs (D). In addition, the angle of attack of the segments and blades can be controlled. The purpose of the system is to increase the annual electric power production of wind turbines.

Description

technical field [0001] Although such a system can be applied in any field where control of turbine power is required, its main field of application is for wind turbines to generate electricity. The size and speed of such turbines technically make implementing such a system easier, and the added complexity is compensated by capturing more energy from the wind. Background technique [0002] Over the past few decades, several control systems have been developed to deal with the high variability of wind speed. We can divide them into two categories: active systems and passive systems. Stall control is widely used in passive systems. In passive stall controlled wind turbines, the rotor blades are bolted to the hub at a fixed angle. The geometry of the rotor blade profile should conform to the aerodynamic design to ensure gas turbulence on the leeward side of the rotor blade when the wind speed is too high. This stall reduces the lift force on the moving blades on the rotor. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00F03D7/02
CPCY02E10/723F05B2240/2021F03D7/0236Y02E10/72
Inventor 胡安安东尼奥·塔拉沃若马丁
Owner ESDRAS AUTOMATICA
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