风速突变下直驱永磁风力发电机输出转矩特性

Output Torque Characteristics of Direct-drive Permanent Magnet Wind Turbine Under Wind Speed Mutation

以某型2 MW直驱永磁风力发电机为研究对象,采用仿真方法获取风速突变下直驱永磁风力发电机输出转矩特性.建立了突变风和风力发电机输出力矩仿真模型,获取了不同风况下风力发电机输出转矩特性,结果表明:建立的风速模型和风力发电机轴系模型可以用于仿真研究,发电机输出转矩峰值与突变风的峰值成正比,发电机输出转矩波动幅度与突变风的持续时间成反比,发电机输出转矩峰值随突变风扰动范围增大而缓慢上升,发电机输出转矩频谱特性与突变风频谱显示频率主要集中在0~5 Hz,风速频率为0.665 Hz时振幅突增,转矩频率在0.605 Hz时振幅最大.

A 2MW direct-drive permanent magnet wind turbine is used to obtain the output torque characteristics of a direct-drive permanent magnet wind turbine under wind speed mutation using simulation methods.A simulation model of wind mutation and wind turbine output torque is established to obtain the wind turbine output torque characteristics under different wind conditions.The results show that the wind mutation model and the wind turbine shaft system model can be used for simulation studies;the peak generator output torque is proportional to the peak of the sudden wind change;the fluctuation of the generator output torque is inversely proportional to the duration of the sudden wind change,and the peak generator output torque rises slowly with the increase of the disturbance range of the sudden wind change.The output torque spectrum characteristics of the generator are basically the same as the sudden change wind spectrum characteristics.The frequency is mainly concentrated in 0~5 Hz with maximum value being 0.605 Hz.