基于预测PI的级联H桥整流器准比例谐振控制研究

文章以单相级联H桥整流器为研究对象,主要从系统双闭环控制和直流侧电容电压平衡控制方面入手对其实现方法进行优化,以解决现有控制方案电流谐波含量大,电容电压均衡效果差等缺点。文章中电流环控制采用准PR控制,电容电压均衡采用预测PI控制,并通过仿真分析验证了文章所提优化控制方案的优越性。

In this paper,the single-phase cascaded H-bridge rectifier is taken as the research object,and its realization method is optimized mainly from the aspects of double closed-loop control and DC-side capacitor voltage balance control,in order to solve the shortcomings of the existing control schemes,such as high current harmonic content and poor capacitor voltage balance effect.In this paper,quasi PR control is used for current loop control and predictive PI control is used for capacitor voltage equalization.The superiority of the optimal control scheme proposed in this paper is verified by simulation analysis.