基于瞬时无功理论的检测方法中低通滤波器的优化设计  

Optimized Design of Low-Pass Filter for Detecting with Instantaneous Reactive Power Theory

作　　者：付青[1] 罗安[1] 汤赐[1] 刘尧[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2006年第2期55-58,共4页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(60474041)

摘　　要：针对瞬时无功理论的检测方法中Butterworth低通滤波器存在动、静态特性难以兼顾的弱点,选用Butterworth滤波器和均值滤波器串联的形式作为优化低通滤波器,通过均值滤波器抑制Butterworth滤波器的输出纹波,选用2阶Butterworth滤波器以加快检测速度.实验表明,该优化低通滤波器既可以保证畸变电流的检测精度,又具有较快的响应速度.For aberrance current detecing based on the instantaneous reactive power theory, it＇s difficult for Butterworth filter to acquire famous dynamic and static state characteristics at the same time, This paper pro- posed an optimized design using Butterworth filter and FIR filter in series, which utilized FIR filter to suppress the output ripple of 2 order Butterworth filter. Experimental results showed that this optimized filter can achieve both high precision and heart-stirring dynamic response simultaneously.

关 键 词：瞬时无功理论 谐波及无功检测 低通滤波器 

分 类 号：TP732[自动化与计算机技术—检测技术与自动化装置]