有源电力滤波器电流控制研究

Current Control Research for Parallel Active Power Filter

传统PI无法实现有源电力滤波器无静差谐波补偿,本文提出了两种输出电流控制策略:PI控制和重复控制并联运行的复合控制技术与指定次数无静差控制技术。PI控制和重复控制并联运行的复合控制技术利用重复控制对于周期扰动信号无差跟踪的特点来提高有源滤波的稳态精度,PI控制保证有源电力滤波器的动态性能。指定次数无静差控制技术对单频率谐波进行无静差调节。仿真与实验结果证明了所提出的两种控制技术的有效性。

Since traditional PI controller cannot realize zero steady-error harmonic compensation for active power filter, two methods, composed controller with PI controller and repetitive controller parallel running are proposed and specified order zero steady-error controller, are proposed. Composed controller with PI controller and repetitive controller parallel running improves steady performance since repetitive controller can follow periodic disturbance with zero steady-error, while PI controller ensures rapidly responding to big change. Specified order zero steady-error technology can realize zero steady-error control for single frequency harmonic. Simulation and experiment show these two methods are very useful, however they should be tested in applications of industry field.