Wind-powered electrical generator and blade pitch control method therefor

Abstract

Disclosed is a wind-powered electrical generator that improves the aerodynamic balance of a turbine rotor during shutdown, thereby decreasing the maximum load on the turbine and reducing the weight and cost of the generator. Also disclosed is a blade pitch control method for said generator. The disclosed wind-powered electrical generator is provided with: a reference pitch control unit (11) which generates a reference pitch value common to all the blades on the turbine; an independent pitch generation unit (13) which generates independent pitch values specific to each blade; multipliers (21 to 23) which multiply each independent pitch value by an independent-pitch gain; a gain generator (14); and adders (24 to 26) which add the reference pitch value to the output from each multiplier (21 to 23) and supply the results to pitch actuators (31 to 33), one for each blade. When the disclosed generator is shut down, the gain generator (14) brings the independent-pitch gain down from a prescribed pre-shutdown value to zero over a set first length of time.

Description

Technical field [0001] The present invention relates to a wind power generation device with an independent tilt angle control method and a wing tilt angle control method, and in particular to further reducing the aerodynamic imbalance of the wind turbine rotor when the operation is stopped, and further reducing the maximum load that becomes the design constraint of the wind turbine, and can achieve A wind power generation device with light weight and low cost of the device and its wing tilt angle control method. Background technique [0002] Such as figure 2 As shown, the propeller-type windmill used in the wind power generation device has multiple windmill blades (usually three, and the structure with three windmill blades is described in this specification), and the inclination angle of the wings is controlled according to the wind conditions to obtain The specified rotation speed and output. In addition, in wind turbines in recent years, as the blade length of the wind turbin...

AI Technical Summary

Problems solved by technology

Therefore, there is a disadvantage that the excessive load is reflected in the strength design of the mechanical parts, resulting in an increase in the weight of the device and an increase in cost.

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