摘要
介绍了永磁直驱风力发电系统控制研究。针对传统矢量控制中PI控制器存在参数不易整定,对外界扰动及参数摄动鲁棒性差的问题,引入了滑模变结构控制器。为了减小滑模控制中的抖振现象提高系统的动态品质,提出了一种基于变速变指数趋近律的滑模变结构控制策略。为了使变速变指数趋近律在大幅度削弱抖振的同时,依然使系统具有较强的鲁棒性,对滑模增益进行分段设计,得出基于变增益变速变指数趋近律的滑模变结构控制器。最后在永磁同步风力发电矢量传统线性PI控制的基础上,结合上述滑模变结构控制策略在Matlab/Simulink环境下进行了仿真实验,仿真实验验证了新型滑模控制策略的优越性。
The control of permanent magnet direct drive wind power system was described. As the parameters of PI controller in traditional vector control is difficult to setting and poor robustness in external disturbance and parameter change. Sliding mode variable structure controller was introduced. In order to reduce chattering in the sliding mode control to improve dynamic performance of the system, a new type of a variable speed and exponential reaching law was used to overcome the shortcoming of conventional exponential reaching law. Effectively restrained the inherent chattering of sliding mode control. In order to make the new type of variable speed and exponential reaching law still remain the strong robustness in weaken chattering, the sliding mode gain has been designed step by step. Finally, at last we get variable gain variable speed index reaching law sliding mode controller. On the basis of traditional vector control combining the sliding mode control strategy are simulated in Matlab/Simulink, simulation verify the superiority of the improved control strategy.
出处
《电气传动》
北大核心
2014年第9期49-53,共5页
Electric Drive
基金
教育部博士点基金(20106118110009)
