基于模糊PI的机侧变流器控制研究  

作　　者：李春亚[1] 吕蒙[1] 

机构地区：[1]郑州铁路职业技术学院,河南郑州451460

出　　处：《科技创新与应用》2018年第22期87-89,共3页Technology Innovation and Application

摘　　要：由于风速的随机性及直驱永磁风电机组的非线性和强耦合性,PI控制无法实现良好的动态性能。文章在机侧变流器传统双闭环控制策略的基础上,将模糊控制理论与PI控制相结合,速度外环采用模糊PI控制器,能够根据实际工况实时对PI参数进行调节。并基于Matlab/Simulink仿真平台搭建仿真模型对提出的控制策略进行验证。仿真结果表明,当风速发生变化时,相比于传统的PI控制器,模糊PI控制有效地改善了PI控制器响应速度慢、超调大等缺陷,提高系统的动态性能和抗干扰能力。该方法用于直驱永磁风力发电系统是可行的。Because of the randonmess of wind speed and the nonlinearity and strong coupling of direct-drive permanent magnet wind turbine PI control can not achieve good dynamic performance. On the basis of traditional double closed loop control strategy of machine side converter, this paper combines fuzzy control theory with PI control, adopts fuzzy PI controller in speed outer loop, and can adjust PI parameters in real time according to actual working conditions. Based on Matlab/Simulink simulation plarform, a simu- lation model is built to verify- the proposed control strategy. The simulation results show that compared with the traditional PI con- troller, fuzzy PI controller can effectively improve the system dynamic performance and anti-jamming ability by improving the slow re- sponse speed and large overshoot of the PI controller when the wind speed changes. The method is feasible for direct-drive permanent magnet wind power generation system.

关 键 词：风力发电 变流器 模糊PI 

分 类 号：TM46[电气工程—电器]