康家玉,曹志威,王旭,刘甲琛

• 1:陕西科技大学电气与信息工程学院

摘要(Abstract)：

小波变换(WT)具有可变的时-频窗口,能够聚焦信号的任意细节,适用于非稳态及瞬变信号的分析和处理,但因存在小波混叠现象,导致其分析的精度低、鲁棒性差。针对db20小波消失矩阶数大的特性和良好的频带划分效果,同时为满足电力系统谐波有效分析的要求,提出基于db20小波变换抗混叠的谐波分析方法。该方法首先将信号按频带分解成子频带信号,再利用连续小波变换分析子频带信号,获取谐波信息。经Matlab仿真表明,所提方法能够有效地分析电力系统谐波信号。

关键词(KeyWords)： 小波变换;db20小波;小波混叠;子频带信号;抗混叠;电力系统谐波

Abstract:

Keywords:

基金项目(Foundation): 陕西省科技厅工业攻关项目(2015GY038)~~

作者(Author): 康家玉,曹志威,王旭,刘甲琛

DOI: 10.16652/j.issn.1004-373x.2018.19.012

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