单相中频逆变器中的双分数阶重复控制策略  

Double Fractional Repetitive Control Strategy in Single Phase IF Inverter

作　　者：王晓雷[1] 张臣 郭飞亚 Wang Xiaolei;Zhang Chen;Guo Feiya(School of Electronic Information,Zhongyuan University of Technology,Zhengzhou 450007,China)

机构地区：[1]中原工学院电子信息学院,郑州450007

出　　处：《机电工程技术》2023年第11期52-55,129,共5页Mechanical & Electrical Engineering Technology

摘　　要：当360~800 Hz单相变频逆变器调频时,输出频率大范围变化会使得系统采样频率与输出频率比值可能不为整数。传统重复控制器此时无法精确跟踪输入信号,输出存在较大的静差,最终会导致系统输出的电能质量变差。为此采用了一种基于有限脉冲响应(FIR)滤波器的分数阶重复控制的控制策略,该策略既能实现分数延迟也能应用到相位超前设计上,利用分数阶相位超前解决了控制系统相位超前校正精度不高的问题。给出了控制系统的结构对其进行了理论分析,也给出了控制器的设计思路。最后,在MATLAB/Simulink工具中搭建了仿真模型,将重复控制与双分数阶重复控制两种控制方案做了对比,结果表明:双分数阶重复控制系统输出稳态误差更小,输出波形质量更好。When a 360~800Hz single-phase inverter is frequency tuned,the large range of changes in the output frequency will make the ratio of the system sampling frequency to the output frequency may not be an integer.The traditional repetitive controller will not be able to accurately track the input signal,and there will be a large static difference in the output,which will eventually lead to poor power quality of the system output.To solve this problem,a control strategy based on fractional order repetitive control based on finite impulse response(FIR)filter is adopted,which can not only realize fractional delay but also be applied to phase lead design,and use fractional order phase advance to solve the problem of low phase advance correction accuracy of control system.The structure of the control system is introduced,the theoretical analysis is carried out,and the design ideas of the controller are also given.Finally,a simulation model is built in the MATLAB/Simulink tool,and the two control schemes of repeated control and double-fractional repetitive control are compared and experimented,and the experiments confirm that the output steady-state error of the double-order repeated control system is smaller and the output waveform quality is better.

关 键 词：变频逆变器 分数阶重复控制 分数延迟 分数阶相位超前 

分 类 号：TM464[电气工程—电器]