基于模糊PI调节器的双馈风力发电机转速观测器设计

Design of Speed Observer of Doubly-Fed Wind Generator Based on Fuzzy PI Controller

针对双馈风力发电机基于常规PI调节器的转速观测器输出超调大,动态响应慢等问题,设计了基于模糊PI调节器的转速观测器,对比基于常规PI调节器的转速观测器进行了仿真。基于双馈风力发电机定子电压无速度传感器的闭环检测方法,分析了基于模糊PI调节器的转速观测器的结构,并设计了模糊PI控制器,在MATLAB/Simulink仿真环境下,建立了基于模糊PI调节器的转速观测器仿真模型。仿真结果表明,基于模糊PI调节器的转速观测器,相对基于常规PI调节器的转速观测器,可以在更短的时间内达到稳定状态,抗干扰能力也更强。

Aiming at the problem of large output overshoot and slow dynamic response of speed observer based on conventional PI controller for double-fed wind generator,speed observer based on fuzzy PI controller was proposed and simulation were carried out compared with conventional PI controller.Based on sensorless control strategy of DFIG,structure of speed observer based on fuzzy PI controller was analyzed.Fuzzy PI controller was designed,and simulation model was established in Matlab/Simulink environment.The simulation results indicate that speed observer based on fuzzy PI controller can reduce setting time efficiently and have more anti-interference ability in comparison with speed observer based on conventional PI controller.