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Entropy 2015, 17(8), 5811-5828; doi:10.3390/e17085811

Combined Power Quality Disturbances Recognition Using Wavelet Packet Entropies and S-Transform

School of Electrical Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
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Academic Editor: Raúl Alcaraz Martínez
Received: 29 May 2015 / Revised: 30 July 2015 / Accepted: 10 August 2015 / Published: 12 August 2015
(This article belongs to the Special Issue Wavelet Entropy: Computation and Applications)
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Abstract

Aiming at the combined power quality +disturbance recognition, an automated recognition method based on wavelet packet entropy (WPE) and modified incomplete S-transform (MIST) is proposed in this paper. By combining wavelet packet Tsallis singular entropy, energy entropy and MIST, a 13-dimension vector of different power quality (PQ) disturbances including single disturbances and combined disturbances is extracted. Then, a ruled decision tree is designed to recognize the combined disturbances. The proposed method is tested and evaluated using a large number of simulated PQ disturbances and some real-life signals, which include voltage sag, swell, interruption, oscillation transient, impulsive transient, harmonics, voltage fluctuation and their combinations. In addition, the comparison of the proposed recognition approach with some existing techniques is made. The experimental results show that the proposed method can effectively recognize the single and combined PQ disturbances. View Full-Text
Keywords: wavelet packet; Shannon entropy; Tsallis entropy; modified incomplete S-transform; combined disturbances; recognition wavelet packet; Shannon entropy; Tsallis entropy; modified incomplete S-transform; combined disturbances; recognition
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Liu, Z.; Cui, Y.; Li, W. Combined Power Quality Disturbances Recognition Using Wavelet Packet Entropies and S-Transform. Entropy 2015, 17, 5811-5828.

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