一种新颖的用于单相逆变器的重复控制器

A novel repetitive controller used in single-phase inverter

单相逆变器越来越被广泛应用于不间断供电装置和其他工业设备中.为了让单相逆变器能够输出高质量及最低谐波总含量的正弦波电压,提出了一种新颖的数字重复控制算法.在这种方法中,重复控制器嵌套于状态反馈控制中,其中重复控制器能够消除周期性的扰动,跟踪周期或直流参考信号,实现无差跟踪.这里系统地阐述了该控制器的设计方法,并分析了采用该控制器的系统的稳定性.基于设计结果搭建仿真模型,仿真结果验证了该方法的有效性.

Single-phase inverters are more and more widely used in the uninterruptible power supplies and other industrial equipments. In this paper, a novel digital repetitive control scheme is proposed for the single-phase inverters to achieve the high-quality sinusoidal output voltages and the minimum total harmonics distortion. In the proposed control scheme, the repetitive controller is plugged into the stable state feedback controlled single-phase inverter system. The repetitive controller is designed to eliminate the periodic disturbance and track the periodic or DC reference signal with zero tracking error. The design method of the controller is described systematically, and the stability of the system is analyse＆ The simulation model was established based on the design and the simulation results illustrate the availability of the proposed scheme.