基于提升小波变换的并联型有源滤波器的研究

Research of Shunt Active Power Filter Based on Wavelet Transform Lifting

并联型有源电力滤波器可较好地补偿电流源产生的谐波。根据电力系统要求实时性跟踪的特点,提出了一种基于提升小波变换的实时检测电力系统中谐波电流的新方法,构建了系统的仿真模型。仿真结果表明,此方法可以很好地跟踪时变谐波,准确检测出闪变电流信号,可以满足有源滤波器(APF)的实时检测要求。

The shunt active power filter can be used to compensate the harmonics generated by current source.In the paper,based on characteristic of dynamic chasing of electric power system,this paper presents a means with which wavelet transform lifting can be used to detect harmonic current real-time in power system.In this paper,simulation model of system is found.Simulation results show that this method can track the harmonic current quickly,detect the flash current nicety,and meet the realtime detecting need of active power filter(APF).