Visualizing time-varying power system harmonics using a Morlet wavelet transform approach

被引：17
|
作者：
Huang, SJ [1 ]
Hsieh, CT [1 ]
机构：
[1] Natl Cheng Kung Univ, Dept Elect Engn, Tainan 70101, Taiwan
来源：
ELECTRIC POWER SYSTEMS RESEARCH | 2001年 / 58卷 / 02期
关键词：
Morlet wavelet; time-varying harmonics; time-frequency localization;
D O I：
10.1016/S0378-7796(01)00122-5
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：
In this paper, a Morlet wavelet transform approach for the study of time-varying power system harmonics is proposed. By this method, because the time-frequency localization characteristics are embedded in wavelets, the time and frequency information of a waveform can be simultaneously presented as a visualized scheme. Different from the fast Fourier transform, the wavelet transform approach is more efficient in monitoring the signals of interest when time varies. The proposed method has been applied to visualize inrush current harmonics of transformers and to investigate arc-furnace-generated signals. From the test results. the merits of the proposed method have been demonstrated for applications. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：81 / 88
页数：8
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