双馈异步风力发电机偏航静态误差自动修正算法

Automatic correction algorithm for yaw static error of doubly fed asynchronous wind turbines

为了提高风力发电机的风能捕获效率,增加发电量,提出双馈异步风力发电机偏航静态误差自动化修正算法。结合经验算法对风向仪采集的实时风况数据展开分析,明确了风力发电机偏航静态误差所在区间。引入动量-叶素理论,计算出双馈异步风力发电机偏航静态误差。将偏航静态误差的校正问题转化为发电机的转速的自动控制问题,结合固定时间理论,完成滑模控制器的构建,进而实现双馈异步风力发电机偏航静态误差的自动化修正。实验结果表明,所提方法能够在持续稳定控制的前提下,有效实现偏航静态误差的校正,对于提高风力发电机的性能、稳定性和经济效益具有重要意义。

In order to improve the wind energy capture efficiency and increase the power generation of wind turbines,an automatic correction algorithm for the yaw static error of doubly fed asynchronous wind turbines is proposed.By combining empirical algorithms,the real-time wind condition data collected by the wind vane was analyzed,and the range of static yaw error of the wind turbine was clarified.Introduce momentum blade element theory to calculate the yaw static error of doubly fed asynchronous wind turbines.Transforming the correction problem of yaw static error into an automatic control problem of generator speed,combined with fixed time theory,the construction of a sliding mode controller is completed to achieve automatic correction of yaw static error in doubly fed asynchronous wind turbines.The experimental results show that the proposed method can effectively correct the static error of yaw under the premise of continuous stable control,which is of great significance for improving the performance,stability,and economic benefits of wind turbines.