摘要
海上风电风速变化很大,采用PID控制难以在不同风速下有好的控制效果.本文在分析PID控制器缺点的基础上,提出灰色预测与模糊PID控制相结合的新型控制方法.模糊PID控制器能够保证在不同风速下均有较好的控制结果,而灰色预测则能够根据以往输出功率给出相应适当的补偿信号,提高控制系统的响应速度,确保最大功率的实时跟踪.对系统仿真表明,该方法在风速变化过程能中有效地跟踪最大功率,减小系统超调,缩短调节时间,具有较为满意的控制效果.
Because of the great variation of the sea wind speed, it is difficult to have a good control effect under different wind speeds using the PID control. This paper firstly analyzes the shortcomings of PID controller, then a new pitch control method combining with gray prediction and fuzzy PID controller is proposed. The fuzzy PID controller can produce a better control than PID control under the different wind speeds. With the previous power output signal, the gray prodiction can give corresponding and appropriate compensation signal and improve the rapidness of control system to ensure maximum power real-time tracking. With the simulation of the system at different wind speeds, the new pitch control strategy can effectively track maximum power and reduce regulation time; and it has a satisfactory control performance.
出处
《三峡大学学报（自然科学版）》
CAS
2011年第2期36-39,共4页
Journal of China Three Gorges University：Natural Sciences
