To solve the problem of blade vibration in wind power generation systems,an active control method for suppressing blade in-plane vibration was proposed.Firstly,the blade was equated to a cantilever beam of uniform cross-section,and its deflection expressions in the cases of free vibration and forced vibration were solved based on the relevant theory of material mechanics.And then the vibration moment in the rotating plane was calculated according to the deflection expressions,and the moment transmission model from the blade end to the motor end was established.Finally,the moment for vibration damping was modulated at the motor end.The simulation results confirm that the proposed method can effectively reduce the displacement at the blade tip,and the vibration suppression rate can be above 70%.The experimental results show that the fluctuation amplitude of the motor torque is significantly reduced,and this method can greatly reduce the faults caused by the blade vibration of the wind power system.
关键词
振动与波/风力发电/叶片/力矩传导模型/抑制
Key words
vibration and wave/wind power/blade/moment transfer model/suppression
维普
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