基于柔性传动链的风力机功率控制

针对风力机变桨系统特性,研究功率控制策略。首先分析风力机能量转换理论,确定影响功率输出的重要因素;再建立变桨系统闭环传递函数模型;以低速轴和高速轴为纽带,考虑柔性,建立柔性传动链系统模型。由于作用在风轮上的风速难于准确实时测量,以最小二乘支持向量机方法对风速进行预测,然后采用变论域模糊方法实现变桨过程中的功率控制,提高系统的自适应能力。仿真验证了所提方法的适用性和有效性。

Wind Turbine Power Control Based on Flexible Drive Train

Power control strategies of wind turbine are researched considering pitch system characteristics.Firstly,the energy conversion theory of wind turbine is analysed and the important factors of output power are determined.Then,the closed loop transfer function model of pitch system and the flexible transmission chain system model are builted.The wind speed is forecasted by least squares support vector machine method,with the actual wind speed on the wind wheel is difficult to be accurately measured.To realize power control and improve adaptive ability of system,the power is controlled through variable universe fuzzy control method. The simulation shows that the proposed methods are applicable and effective.