摘要
在一定的工作环境下,参数的变化使直驱式永磁同步发电机(D-PMSG)处于混沌运动状态,这将危及整个风力发电系统的稳定运行。设计了一种跟踪控制器消除D-PMSG的混沌运动现象。推导了D-PMSG的简化数学模型,并分析了D-PMSG系统的混沌吸引子和分岔图,证明了D-PMSG混沌运动现象的存在。采用T-S模糊模型对D-PMSG非线性系统进行建模,用线性模型作为后件来表达每条模糊语句所表征D-PMSG的局部动态特性,通过模糊隶属函数将这些线性模型综合起来而构成全局模糊模型。利用并行分布补偿方法设计全局渐进稳定的跟踪控制器将混沌运动稳定于期望平衡状态。仿真结果表明所设计的跟踪控制器响应速度快,能够有效地消除D-PMSG的混沌运动现象,具有较好的控制效果。
The parameter change under certain conditions may induce the D-PMSG（Directly driven Permanent Magnet Synchronous Generator） to operate in chaos motion condition,which threatens the stable operation of wind power generation system.A tracking controller is designed for it.A simplified mathematical model of D-PMSG is established and the chaos behaviors of D-PMSG are analyzed by the strange attractor and bifurcation diagram.The nonlinear D-PMSG chaotic system is modeled based on T-S fuzzy model.The local dynamic behavior of D-PMSG is presented by the fuzzy statement based on linear model and these linear models are integrated by the fuzzy membership function to form the global fuzzy model.A tracking controller is designed with the parallel distributed compensation method to stabilize the chaos motion.Simulative results demonstrate that the tracking controller effectively eliminates the chaos motion with quick response and excellent control effect.
出处
《电力自动化设备》
EI
CSCD
北大核心
2011年第6期45-49,共5页
Electric Power Automation Equipment
