摘要
三电平逆变器存在冗余开关量,且控制系统较复杂,对此文中提出一种智能PR控制的三电平逆变器。模糊控制自适应直流母线变化,提高系统响应速度。控制内环采用比例谐振(PR)控制直接对交流指令信号做无静差控制,避免了旋转坐标变换引入的角度计算。三电平中点引出型(NPP)逆变拓扑均衡了各电平的有源器件,简化逆变系统。从功率拓扑电路工作机理角度做了分析,该拓扑均衡了各电平开关器件的损耗,采用智能PR控制相比传统比例积分(PI)控制器,提升了三电平逆变系统的动态响应性能,同时降低了逆变系统的复杂性。仿真和实验结果验证了该系统方案的有效性,且系统的响应速度优于传统的PI双闭环控制系统。
Since the three⁃level inverter has abundant switching value and complex control system,a three⁃level inverter based on intelligent proportional⁃resonant(PR)control is proposed.Fuzzy control for self⁃adaption DC bus change can improve the response speed of the system.The PR control is adopted for the control inner ring to directly execute non⁃static control to the AC instruction signal,which can avoid angle calculation introduced by rotate coordinate conversion.A novel three⁃level neutral point piloted(NPP)inverting topology can balance the active components in every level and simplify the inverting system.The operation principle of the power topology circuit is analyzed in detail.The topology can balance the wastage of all power switches.In comparison with the tradition proportional integral(PI)controller,the three⁃level inverter based on PR control can improve the performance of dynamic response of the three⁃level inverter system and reduce the complexity of the inverter system.The simulation and experiment results verify the effectiveness of the inverter system and show that its response speed is superior to that of the traditional PI control system.
作者
常雨芳
钟擎天
CHANG Yufang;ZHONG Qingtian(Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System,Hubei University of Technology,Wuhan 430068,China;Hubei Power Grid Intelligent Control and Equipment Engineering Technology Research Center,Hubei University of Technology,Wuhan 430068,China)
出处
《现代电子技术》
2021年第20期121-126,共6页
Modern Electronics Technique
基金
国家自然科学基金资助项目(61903129)。
关键词
三电平逆变器
智能控制
比例谐振控制
模糊控制
损耗均衡
拓扑系统
空间矢量调制
three⁃level inverter
intelligent control
proportional⁃resonant control
fuzzy control
wastage equilibrium
topology system
spatial vector modulation
