Impeller galloping control method in aerodynamic performance experiment of horizontal axis wind turbine

Abstract

The invention discloses an impeller galloping control method in an aerodynamic performance experiment of a horizontal axis wind turbine. The method comprises steps that a reflective stripe is pasted on a transmission shaft of an experiment device in a wind tunnel, a laser rotating speed measuring instrument is arranged outside an observation window of the wind tunnel, and the reflective stripe is right opposite to the laser rotating speed measuring instrument; a wind tunnel is started, the rotating speed of the impeller is monitored through the laser rotating speed measuring instrument, a rotating speed change curve along with time is established in a computer, and the wind tunnel is closed till the impeller gallops; the galloping process is repeated after the blade mounting angle is adjusted; the computer automatically converts the rotation acceleration of the galloping at the moment before the galloping; an aerodynamic performance experiment is started, the rotating speed of an impeller is monitored in real time, the rotating acceleration at each moment is automatically converted by a computer, the rotating acceleration obtained in real time is compared with the rotating acceleration at the moment before galloping, and the output load capacity of an electric loader is controlled according to a comparison result; and when the real-time output load capacity of the electric loader reaches the total output load capacity set by the experiment, the comparison process is stopped, and the impeller enters a constant-speed rotation process from starting.

Description

technical field [0001] The invention belongs to the technical field of aerodynamic performance experiments of wind turbines, and in particular relates to a method for controlling an impeller flywheel in an aerodynamic performance experiment of a horizontal axis wind turbine. Background technique [0002] When carrying out the aerodynamic performance experiment of the horizontal axis wind turbine in the wind tunnel, the impeller must go through the process from stationary to starting, and before the impeller starts, the load output by the electric loader used to simulate the load in the horizontal axis wind turbine aerodynamic performance experimental device is 0, the resistance on the impeller is only the mechanical friction resistance of the experimental device itself. When the impeller starts, the impeller will gradually experience the process of rotational acceleration. As the impeller speed increases, the moment of inertia of the impeller itself also increases synchronous...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the prior art, the present invention provides a method for controlling the impeller flying in the aerodynamic performance experiment of the horizontal axis wind turbine. During the start-up process of the impeller, the rotational acceleration before the impeller flying is accurately monitored, and the output of the electric loader is automatically controlled. The load is used to adjust the real-time speed of the impeller to ensure that the impeller can smoothly enter the stage of uniform rotation, achieving the purpose of not only ensuring the smooth start of the impeller but also avoiding the phenomenon of impeller speeding, and effectively avoiding the traditional way of manually controlling the output load of the electric loader. untimely problem

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