风力发电机传动系统随机风速下的载荷特性研究

摘要

A load model of wind turbine transmission system under random wind speed was established,based on simulation method of random wind speed,calculation method of aerodynamic load,vector control method of generator and electromechanical coupling model of wind turbine transmission system.Valid sample of random load of wind turbine transmission system was obtained by example calculation of the load model,and compared with the random wind speed sequence.The results indicate that random load sequence and random wind speed sequence have the same changing tendency,good correlation and similar spectrum characteristics.The results provide the basis for further research of load characteristic and compilation of load spectrum of wind turbine transmission system in complex working condition.%根据随机风速模拟方法、风力机气动载荷计算方法、发电机矢量控制方法和风力发电机传动系统的机电耦合模型,建立了风力发电机传动系统在随机风速下的载荷模型,利用该模型对风力发电机进行实例计算,得到了风力发电机传动系统随机载荷的有效样本。随机风速序列和随机载荷序列的对比分析表明,随机载荷序列与随机风速序列有相同的变化趋势和较好的相关性,并有类似的频谱特性,从而为进一步研究风力发电机传动系统在复杂工况下的载荷变化规律及进行载荷谱的编制奠定了基础。