一种新颖的含有谐振控制器的CVCF逆变器多环反馈控制方法

A novel multi-loop control method with resonant controller for CVCF inverter

多环反馈控制方法以其设计实现过程简单、优越的动态性能而受到特别的关注。它一般包括一个电压外环与一个电流内环,电流内环的给定由电压外环给出。传统多环反馈控制每一环路中使用的都是PID控制器,在稳态精度方面存在缺陷。本文将谐振控制器引入到这种逆变器的多环反馈控制方法中,在电压环控制器中加入了谐振控制器。与传统使用PID控制器的多环反馈控制方法比较,含有谐振控制器的多环反馈控制能获得更高的稳态精度,并且它具有设计简单、易于实现的优点。将含有谐振控制器的多环反馈控制方法用于CVCF(恒压恒频)逆变器,实验结果证明了这种控制方法的有效性。

Multi-loop feedback control is the key strategy for the CVCF inverter due to its ease of implementation and excellent dynamic performance. Multi-loop systems usually include an inner current regulation feedback loop and an outer voltage regulation feedback loop. The reference for the inner current loop is generated by the outer voltage loop. Steady-state error can not be eliminated because controller used in each control loop is usually a PID controller. A novel multi-loop control method with resonant controller for the CVCF inverter is introduced here. The elimination of steady-state error is achieved by the implementation of a resonant controller in the outer voltage loop. The whole design process is described in detail. Experimental result of CVCF inverter using a resonant controller verified the proposed control scheme.