基于虚拟磁链的PWM整流器模糊自适应反推控制  

Fuzzy Adaptive Backstepping Control of PWM Rectifiers Based on Virtual Flux Linkage

作　　者：吉培荣[1,2] 刘超 张赟宁[1,2] 韩国栋[1,2] JI Peirong;LIU Chao;ZHANG Yunning;HAN Guodong(School of Electrical Engineering&New Energy,China Three Gorges University,Yichang 443002,Hubei,China;Hubei Collaborative Innovation Center of New Energy Microgrid,China Three Gorges University,Yichang 443002,Hubei,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]三峡大学新能源微电网湖北省协同创新中心,湖北宜昌443002

出　　处：《电网与清洁能源》2021年第9期27-33,44,共8页Power System and Clean Energy

基　　金：国家自然科学基金项目(61603212)。

摘　　要：三相PWM整流器传统双闭环PI控制参数整定困难且抗干扰能力较弱,控制器稳定性不高,跟踪速度较慢。提出一种新型的控制策略,针对传统虚拟磁链观测器存在的观测误差提出改进方案,利用改进的虚拟磁链观测器替代交流电压传感器,在降低系统复杂度和成本的同时,很好地解决了反推控制存在稳态扰动误差这一问题;根据非线性系统Lyapunov稳定理论设计电压外环和电流内环反推控制器来代替传统的PI控制器,将模糊控制与反推控制相结合,对控制器中的关键参数进行实时优化。通过MATLAB/Simulink进行仿真,引入不同的扰动进行测试,结果表明,所提方法能有效提高系统的抗干扰能力和反应速度,具有良好的动态性能。The parameters of the traditional double closed loop PI control of three-phase PWM rectifiers are difficult to be set and the anti-interference ability is weak,the stability of the controller is poor,and the tracking speed is slow.This paper proposes a new control strategy to improve the observation error of the traditional virtual flux observer.The improved virtual flux observer is used to replace the AC voltage sensor,which can reduce the system complexity and cost of the system and better solve the problem of steady-state disturbance error in the backstepping control.According to the Lyapunov stability theory of nonlinear system,the voltage outer loop and current inner loop backstepping controller are designed to replace the traditional PI controller.The fuzzy control and backstepping control are combined to optimize the key parameters of the controller in real time.Finally,the simulation is built by MATLAB/Simulink,and different disturbances are introduced to the test.It is proved that the method can effectively improve the anti-interference ability and reaction speed of the system,and it has good dynamic performance.

关 键 词：虚拟磁链 反推控制 模糊控制 抗干扰 

分 类 号：TM461[电气工程—电器]