有源电力滤波器电流控制策略研究

针对传统PI无法实现有源电力滤波器无静差谐波补偿的问题,提出了两种输出电流控制策略:PI控制与重复控制并联运行的复合控制技术和指定次数无静差控制技术.前者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.后者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,但其工业现场的应用仍需进一步验证.

Current Control Strategy Research for Parallel Active Power Filter

Since traditional PI controller cannot realize zero steady-error harmonic compensation for active power filter.Two improved methods are proposed,one is composed controller with PI controller and repetitive controller parallel running,the other is specified order zero steady-error controller.The former 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 exper-imental results show these two methods are very useful,however they should be tested in applications of industry field.