Active power filter with a proportional recursive integral controller
有源电力滤波器的比例递推积分控制

In the use of active power filter for eliminating harmonics in the electric power system,the performance of active power filter is not satisfying due to the influence of detection accuracy,time delay of instruction current calculation and phase displacement of output filter.This paper presents proportional recursive integral controller applied for parallel active power filter to improve its steady_state and dynamic performance.The parameters of the controller are on_line tuned by fuzzy inference to enhance self_adaptive ability of the system.It can be applied to single phase,three phases three wires and three phases four wires active power filters. Experimental result confirms the validity of the proposed controller.