建立了电容中分式有源电力滤波器的数学模型，设计其双闭环控制系统，提出了一种改进的控制方案。%A mathematical model of mid-point capacitor active power filter with the double closed loop control system is established and an improved control scheme is proprosed.The ip-iq method which con-tains zero sequence processing links for harmonic detection is adopted.Based on Lagrange quadratic ex-trapolation interpolation,current loop predicts given current value of k+1 time,and the system control is realized by deadbeat manner;The balance of overall voltage is regulated by one PI controller in the dc side and the upper and lower capacitor voltage is regulated by another PI controller.The correctness and effectiveness of the control schemes proposed in this paper is verified by the simulation results.
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