关键词: 风电实验台, 柔性主轴, 拖动电机, 参数辨识

Abstract: The small-capacity wind power test bench is widely used as a key device for wind power grid connection research. However, the existing small-power counter-rotating test bench has not fully considered the dominant torsional mode of the actual MW-level wind turbine shaft system, and thus cannot accurately reproduce the dynamic impact of the shaft system on the unit and the power grid. To improve the simulation accuracy of the test bench, this paper proposes an equivalent stiffness identification method for the test bench drive shaft based on the model reference adaptive system. On this basis, considering the differences between the ideal small-power test bench shaft system model scaled down from the
parameters of large-power wind turbines and the actual test bench shaft system model, a speed control strategy for the wind power test bench drive motor is proposed, which takes into account the influence of drive shaft parameter deviations and moment of inertia deviations. The effectiveness and correctness of the control method proposed in this paper are verified through Simulink simulation. The simulation results show that it can accurately reproduce the torsional dynamics of the actual unit.

Key words: wind power test bench, flexible shafting, drag motor, parameter identification