逆变器数字多环控制技术研究

本文提出了一种逆变器数字多环控制技术,该方案在电流环和瞬时电压环之外附加了一个重复控制环。在实现输出电压解耦和扰动电流补偿后,根据无差拍原理设计的电流环和瞬时电压环控制器极大地改善了逆变器的动态性能,位于外层的重复控制器则提高了稳态精度。该方案在一台基于DSPTMS320F240控制系统的PWM逆变器上得到验证。

Study on digital multiple-loop control technology of inverters

This paper presents a digital multiple-loop control technology of inverters. The scheme incorporates a current loop with an instantaneous voltage loop, while a repetitive control outer loop is added. Since both an output voltage decoupling mechanism and a load disturbance compensation have been added, the current loop and instantaneous voltage loop controller is designed through deadbeat theory, so that the inverter's dynamic performance is much improved, and the repetitive control outer loop improves the steady-state performance. The scheme is proved on a PWM inverter whose control system is based on DSP TMS320F240.