基于电流环复合控制的有源电力滤波器的研究

Research on Shunt Active Power Filter Based on Compound Control of Current Loop

有源电力滤波器通常用于动态抑制谐波、补偿无功。本文采用基于瞬时无功功率理论的自适应闭环检测拓扑结构进行谐波检测,构造出一种鲁棒性好和响应速度快的结构。为了进一步改善系统的性能,提出了基于PI控制和重复控制并联结构的电流控制方法。利用重复控制对于周期扰动信号无差跟踪的特点减小系统的稳态误差,利用PI控制改善系统动态性能。理论分析和仿真结果均证明该方法的可行性。

Three-phase shunt active power filter（APF） is often used to eliminate harmonic and compensate reactive current dynamically.An adaptive close-loop detecting topological structure based on instantaneous reactive power theory is introduced into harmonic detecting in this paper.In order to further improve the performance of the system,a kind of novel output current control architecture with PI and repetitive controller in parallel is presented.The repetitive controller is used to reduce the steady current tracking error caused by cyclic disturbance signal and the PI controller is used to improve dynamic performance.The feasibility of this method is verified completely by theoretic analysis and experimental results in detail.