有源滤波器参考电流的无延时的生成方法  

Delayless Method to Generate Current Reference for Active Power Filter

作　　者：王莉娜[1] 姜勇[1] 

机构地区：[1]中南大学

出　　处：《电气传动》2003年第1期61-64,共4页Electric Drive

基　　金：湖南省重点攻关项目

摘　　要：文章介绍了一种多级自适应滤波系统 ,用于无时延地生成有源滤波器 ( APF )参考电流。该滤波系统主要包括前置低通滤波器和自适应预测滤波器 ,可以从频率和幅值均变化的畸变波形中提取正弦有功电流 ,而不引起任何附加相移。通常 APF只能对基波频率为恒值的电网进行谐波补偿 ,文章提出的 APF结构也可用于输入信号基波频率变化的情况。This paper presents a multilevel adaptive filter system which generates the current reference delaylessly and accurately.Our filter system combines a low-pass prefilter and an adaptive filter,making it possible to extract the sinusoidal current from the distorted waveform without harmful phase shift,even when the frequency and amplitude alter simultaneously.Although active filters are typically used to compensate for the supply harmonics,where the fundamental frequency remains almost constant ,we will show that our filter structure can also be applied to where the frequency alters rapidly.

关 键 词：有源滤波器 参考电流 多级自适应滤波系统 谐波畸变 电网 谐波补偿 

分 类 号：TN713.8[电子电信—电路与系统] TM714.3[电气工程—电力系统及自动化]