Variable speed drive control policy for cylindrical rotor blade of vertical axis wind turbine

Abstract

The invention relates to a variable speed drive control policy for a wheel track cylindrical rotor blade of a vertical axis wind turbine driven by magnus effect. The wind turbine is composed of an annular track, a track trolley, a cylindrical rotor blade, a power generation wheel and corresponding supporting facilities. In a wind field, the cylindrical rotor blade is driven by a variable frequencycontrolled motor to rotate, and the magnus effect generated thereon generates a lift force vertical to the cylindrical rotor and resistance opposite to the wind speed; the rotating direction of the rotor blade is changed at two combined points of upper and lower tuyeres of the annular track, so that the lift force of the rotor blade drives the track trolley to move continuously along the track; the lift force of the blade and the rotating speed of the rotor are in direct proportion and lift force extremity is available; and the benefit of the lift force to the wind turbine and the azimuth angle of the blade have a cosine function relationship. Therefore, the variable speed drive control policy is provided for the rotor blade, the acceleration region of the rotor is prolonged by adopting acosine frequency variable function, the energy consumption of rotor reversing drive is reduced, and the defect that the blade is excessive in energy consumption is overcome.

Description

technical field [0001] The invention relates to the field of vertical-axis wind turbines, in particular to a wheel-rail type vertical-axis wind turbine driven by Magnus effect force, and a variable-speed drive control strategy for cylindrical rotor blades. Background technique [0002] In the history of the development of wind power technology, there has been a vertical axis lift wind turbine based on the Magnus effect ( figure 1 shown), the power blades that generate lift are rotating cylinders (rotor blades) mounted on rail cars. The trolley is placed on the circular track. When the incoming wind blows to the cylinder, the Magnus effect will be generated on the rotating cylinder, that is, on one side of the cylinder, the direction of the wind flow is the same as that of the cylinder surface, and on the other side it is opposite. , the induced circulation around the rotating cylinder will generate a lift perpendicular to the direction of wind flow (hereinafter referred to ...

AI Technical Summary

Problems solved by technology

[0011] Technical issues: The problem of driving the cylindrical rotor must be completed when the Magnus effect vertical axis wind turbine is working, and the rotor needs to change the direction of rotation (rotation) twice during the ci...

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