Frequency characteristics of wavelets

被引：89

作者：

Parameswariah, C ^{[1
]}

Cox, M ^{[1
]}

机构：

[1] Louisiana Tech Univ, Dept Elect Engn, Ruston, LA 71272 USA

来源：

IEEE TRANSACTIONS ON POWER DELIVERY | 2002年 / 17卷 / 03期

关键词：

frequency; frequency response; power quality; transforms; wavelet transforms;

D O I：

10.1109/TPWRD.2002.1022806

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Wavelets detect and locate time of disturbances successfully, but for measurement of power/energy they also have to estimate and classify them accurately. This paper investigates the factors on choice of a certain wavelet function and qualitatively shows how the number of coefficients of the wavelets is an important number that affects output decomposition and energy distribution leakage. Wavelets provide an output in terms of the time-frequency scale. The frequency bandwidth characteristics of these individual wavelet levels provide better understanding of the wavelets. The sampling frequency and the number of data points are important parameters and must be carefully selected to avoid the frequency of interest falling into the end regions.

引用

页码：800 / 804

页数：5

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