风力发电机齿轮故障诊断仿真与模拟试验

为了探讨无传感器故障诊断方法在风力发电机传动系统故障中的感应机理,在SIMULINK环境下,建立了一个双馈风力发电机仿真模型,对风力发电机传动系统故障在发电机定子电流中的响应过程进行理论分析。研制专用的风力发电机组模拟试验台,进行传动系统的断齿故障模拟试验与验证。利用Hilbert变换的幅值和频率解调方法,分析仿真及模拟试验结果,表明定子电流主要反映传动系统的扭矩或速度波动特征,将其用于风力发电机传动系统齿轮断齿类故障的监测与诊断是可行的。

Wind Turbine Gear Fault Simulation and Experiment Research

In order toinvestigate the sensing principle of the sensorless fault diagnosis method used in the fault of the wind turbine drive system, a double-fed induction generator prototype has been built in the environment of SIMULINK. A theoretical analysis for the fault of the wind generator transmission system is used in the response process of the generator stator current. An appropriative simulation test rig for the wind turbine group is established for broken teeth fault simulation and verification of the drive train system. The frequency and amplitude modulation methods of Hilbert transformation are used to analyze the results collected from the simulation experiments. The experimental results indicate that the current in the stator mainly reacts to the torque or velocity fluctuation of the drive train system. Therefore, it is feasible for this approach to be used in wind turbine drive systems of gear teeth broken fault monitoring and diagnosis.