双Buck逆变器嵌入式PI+重复控制研究

摘要

Firstly,dual Buck inverter model based on sinusoidal pulse width modulation (SPWM)is analysed.It is not good in consideration of single prportional integral(P I) control effect.The embedded PI+repetitive control method of dual Buck inverter is studied and the state feedback decoupling of the inverter is carried out.Stability criterions,and compensation methods of PI+repetitive control are respectively analyzed and compared both before and after inverter decoupling.It is concluded that the design of the equivalent control object and compensator of the repetitive control after inverter decoupling is simpler.Finally,simulation and experimental results show that the theoretical analysis is correct and the proposed control scheme is effective.%首先分析了基于正选脉宽调制(SPWM)的双Buck逆变器模型.考虑到单一的比例积分(PI)控制控制效果不佳,此处对双Buck逆变器引入嵌入式PI+重复控制方法进行研究,并对逆变器进行了状态反馈解耦.针对逆变器解耦前后的两种PI+重复控制的稳定性条件和补偿函数设计进行了理论分析和比较,总结出逆变器解耦后的重复控制等效控制对象和补偿器的设计更简单.最后通过仿真和实验表明理论分析的正确性和控制策略的有效性.