一种快速重复控制策略在单相逆变电源中的应用

Fast Repetitive Control Scheme for the Application of Single phase Inverter

输出电压总谐波失真是逆变电源的一项重要指标,因此抑制谐波失真一直是逆变领域的研究热点。引起逆变系统输出电压谐波失真的扰动信号主要由奇次谐波组成,偶次谐波的含量很小。利用此特点逆变系统,提出一种奇次谐波重复控制方法。建立了被控系统模型,基于性能分析及稳定性设计准则,并结合奇次谐波周期信号发生器,设计了相应的零相移补偿器及辅助补偿器。实验结果表明此方法不但可以有效衰减系统奇次谐波干扰,还可以有效地缩短误差收敛时间,提高系统的动态响应速度。

The total harmonic distortion of the output voltage is an important performance index for inverter. Thus, the suppression of harmonic distortion is a research focus in the inverting field. The disturbance that caused the harmonies distortion of the output voltage in the inverter system is mainly composed by odd harmonies while even harmonics content is relatively low. Therefore, an odd-harmonic repetitive control scheme was proposed for pulse width modulation inverter system. This method improves the overall system error convergence rate by sacrificing the even harmonics suppression. Combined with an odd- harmonic periodic generator, a zero- phase compensator was designed for the controlled system. Experimental results verify the odd-harmonic repetitive control can effectively reduce the time of the error convergence and improve the dynamic response speed of the system.