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http://dx.doi.org/10.5370/JEET.2014.9.4.1210

An Applicability of Teager Energy Operator and Energy Separation Algorithm for Waveform Distortion Analysis : Harmonics, Inter-harmonics and Frequency Variation  

Cho, Soo-Hwan (Dept. of Energy Grid, Sangmyung University)
Hur, Jin (Dept. of Energy Grid, Sangmyung University)
Chung, Il-Yop (School of Electrical Engineering, Kookmin University)
Publication Information
Journal of Electrical Engineering and Technology / v.9, no.4, 2014 , pp. 1210-1216 More about this Journal
Abstract
This paper deals with an application of Teager Energy Operator (TEO) and Energy Separation Algorithm(ESA) to detect and determine various voltage waveform distortions like harmonics, inter-harmonics and frequency variation. Because the TEO and DESA algorithm was initially proposed for speech or communication analysis, its applications are limited to some types of waveform in the power quality analysis area. For example, an undistorted voltage signal is similar with a pure sinusoid. A voltage fluctuation is very similar with an amplitude-modulated signal, from the viewpoint of signal theory. And a continuous frequency variation is similar with a frequency-modulated signal, which is also known as a chirp signal. This paper is written to show that the TEO and DESA algorithm can be used for detecting occurrences of the representative waveform distortions and determining their instantaneous information of amplitude and frequency.
Keywords
Event detection; Teager Energy Operator (TEO); Waveform distortions; Harmonics & Inter-harmonics; Frequency variation;
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