A New Variable Step-size LMS Algorithm of Harmonic Current Detection

被引：0
|
作者：
Zhou Xiao-xia [1 ]
机构：
[1] Jiangsu Univ, Sch Elect & Informat Engn, Zhenjiang 212013, Peoples R China
来源：
PROCEEDINGS OF 2008 INTERNATIONAL CONFERENCE ON INFORMATIONIZATION, AUTOMATION AND ELECTRIFICATION IN AGRICULTURE | 2008年
关键词：
Harmonic current detection; Adaptive filter; Variable Step-size; Approximate normalization;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In order to improve the quality of electric energy, the harmonics of power system is restrained and compensated, which effects is determined by precision of detection and its dynamic response characteristics. Considering the low Signal-to-Noise characteristic of the load current, a novel variable step-size LMS (least mean square) algorithm of harmonic current detection is introduced in this paper. This algorithm uses the coherence average estimation of T(n) to control the updating of the step size, where T(n) is the approximate normalization of the error signal to the total signal. It can provide a fast dynamic response while ensuring high detecting precision, and be fit for harmonic current detection of single-phase and three-phase power system. Based on the MATLAB simulation and DSP experiment of the load current, both results have verified the effectiveness.
引用
收藏
页码：379 / 384
页数：6
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