【摘要】 首先通过对数字PI调节器的仿真和实验指出了它在有源滤波中的局限性,提出将重复控制引入到电流环中以提高稳态性能。进而将重复控制和PI控制器并联用于并联型有源电力滤波器输出电流波形控制,其中PI控制保证系统动态性能,而重复控制提高输出电流波形跟踪精度。文中详细分析了控制器的设计思路和频率特性,实验和仿真表明采用该方法后,可以显著改善滤波效果。更多还原

【Abstract】 The paper has pointed out the limitation of PI conditioner in active power filtering through simulation and experimental results, and then proposed applying repetitive control into current loop as to better the steady characteristics. So the paper adopted proportional integral control and repetitive control algorithm to correct the output current waveform of the shunt active power filter. In this control strategy, the proportional integral control is used to guarantee system dynamic performance and the repetitive control is to improve current waveform quality. The controller design procedure and frequency characteristic are analyzed in detail. By this control method, filtering performance is improved. Theoretical analysis is verified by simulation and experimental result.更多还原