基于改进RLS算法的谐波电流检测方法  

Harmonic current detection based on improved RLS algorithm

作　　者：刘国海[1] 吕汉闻[1] 刘颖[1] 陈兆岭[1] 刘慧[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《电力自动化设备》2010年第10期46-49,共4页Electric Power Automation Equipment

基　　金：江苏省科技攻关项目(BE2007069);镇江市社会发展项目(SH2008005)~~

摘　　要：在考虑有源电力滤波器(APF)的低信噪比特性的基础上,提出了一种基于自适应对消技术的改进型RLS检测谐波算法,采用二级滤波来彻底滤除间谐波,并通过权值梯度误差的变化来更新自适应过程。追踪一级滤波器权值W(n)的变化,调节RLS算法中的P(n)参数,以达到快速收敛的目的。利用Matlab软件建立仿真模型,进而在DSP芯片TMS320F240上实现该算法,验证了改进算法既能够检测间谐波又克服了传统RLS算法突变响应过慢的缺点。With the consideration of low APF signal-noise ratio,an RLS algorithm based on adaptive noise canceling technology is introduced for harmonic current detection,which adopts two-stage filter to remove interharmonies and updates the adaptive process by controlling the weight gradient error. The weight W（n） of first stage filter is tracked and the parameter P（n） of the algorithm adjusted to achieve fast convergence. The simulation model is established with Matlab and the algorithm implemented on TMS320F240 chip. The simulative results show that,the improved RLS algorithm detects the interharmonics with faster mutation response than that of traditional RLS algorithm.

关 键 词：电力谐波 自适应滤波 间谐波 有源电力滤波器 RLS算法 突变 

分 类 号：TM930.12[电气工程—电力电子与电力传动]