基于风力发电机组传动链扭转频率的研究与应用

Study and Application on Drive Train Torsional Frequency Based on Wind Turbine

为了准确地分析风力发电机组传动链扭转频率,考虑风力机与发电机之间传动轴扭转柔性的作用,通过等效的两质量块模型,建立了风力发电机组传动链数学模型,结合模态分析法,计算出了该模型的2个模态频率,并通过实际物理意义,获得了表征传动链扭转频率的计算公式。并以FD70B风力发电机组设计为例,将所得计算公式应用到实际测量数据中,分析出实际传动链扭转频率,并依据传动链扭转频率计算公式来指导模型参数校正,更好地为风力发电机的设计和应用提供理论依据和技术支撑。

In order to accurately analyze wind turbine drive train torsional frequency,considering the factor of the drive train shaft tensional flexibility between a wind turbine and a generator,a wind turbine drive train mathematical model was established by using two equivalent lump mass models in this paper.Then combining with the modal analysis method to calculate two modal frequencies of the model,the calculation formula of drive train torsional frequency was received by the actual physical meaning.Taking FD70 B wind turbine as an example,it was easy to apply the formula to the actual measurement data and analyze the actual drive train torsional frequency,then guide the model parameter calibration based on the drive train torsional frequency calculation formula.It was better to provide theoretical basis and technical support for the design and application of wind turbine.