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Performance of modified S-transform for power quality disturbance detection and classification

M. Noh , Faridah Hanim and Ab. Rahman, Munirah and Yaakub, M. Faizal (2017) Performance of modified S-transform for power quality disturbance detection and classification. Indonesian Journal of Electrical Engineering and Computer Science, 2 (3). pp. 401-408. ISSN 25024760

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Abstract

Detection and classification of power quality (PQ) disturbances are an important consideration to electrical utility companies and many industrial customers so that diagnosis and mitigation of such disturbance can be implemented quickly. Power quality signal consists of stationary and non-stationary events which need a robust signal processing technique to analyse the signals. In this paper, Modified S-Transform (MST) was used to analyse single and multiple power quality signals. MST is a modified version of S-transform with improved time-frequency resolution. The power quality signals that are considered in this study are voltage swell, sag, interruption, harmonic, interharmonic, transient, sag plus harmonic and swell plus harmonics. The performance of the proposed method has been studied under noisy and unnoisy condition. Hard thresholding technique has been applied with MST while analysing noisy PQ signals. The result shows that MST is able to give higher classification rate with better time and frequency distribution (TFD) spectrum of the PQ disturbances.

Item Type: Article
Uncontrolled Keywords: Detection and classification; power quality disturbances; MST; time and frequency distribution
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1001-1841 Production of electric energy or power. Powerplants. Central stations
Divisions: Faculty of Engineering Technology > Department of Electrical Engineering Technology
Depositing User: Mr. Mohammad Shaifulrip Ithnin
Date Deposited: 18 Feb 2019 06:54
Last Modified: 18 Feb 2019 06:54
URI: http://eprints.uthm.edu.my/id/eprint/10613
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