基于FBD法的有源电力滤波器参考电流检测新方法

构建了一种基于模糊决策的复合低通滤波器(LPF),提出了一种基于FBD法的有源电力滤波器(APF)参考电流检测新方法.该方法利用锁相环(PLL)产生参考电压,将负载电流投影到参考电压上,通过LPF可以准确检测出基波有功电流和基波无功电流.设计了基于模糊决策的复合LPF,该LPF由截止频率为10 Hz和30 Hz的双二阶...

A New Reference Current Detecting Algorithm Based on FBD Method for Active Power Filter

Multiple low pass filter (LPF) with fuzzy reasoning was established, and a detecting algorithm based on S. Fryze, F. Buchholz, M. Dpenbrock (FBD) method was proposed for active power filter (APF). Reference voltage was generated by phase locked loop(PLL), and load current was projected to reference voltage, and then active power fundamental current and reactive power fundamental current could be detected accurately. The multiple LPF composed of two two order Butterworth LPFs was developed on the basis of fuzzy control, and the fuzzy controller was designed by taking into account the changing amplitude of load current and the lowest harmonic current. Compared with traditional current detecting algorithms, this new reference current detecting algorithm based on FBD method is much simpler and of higher accuracy and better dynamic performance even under unbalanced voltage circumstance. Theoretical analysis and MATLAB simulation results have proved the validity and effectiveness of the proposed reference current detecting algorithm.