caa a22 4500 378935240 CHVBK 20180305123639.0 cr unu---uuuuu 161128e20041122xx s 000 0 eng 10.2202/1553-779X.1007 doi (NATIONALLICENCE)gruyter-10.2202/1553-779X.1007 Power System Disturbance Recognition Using Wavelet and S-Transform Techniques [Elektronische Daten] [Jaya Bharata Reddy, Dusmanta Kumar Mohanta, B.M. Karan] Power quality issues have been a source of major concern in recent years due to extensive use of power electronic devices and non-linear loads in electrical power system and consequently sensitive detection and accurate classification of power disturbances have become very much necessary. To monitor electrical power quality disturbances, short time discrete Fourier transform (STFT) is most often used. But for non- stationary signals, the STFT does not track the signal dynamics properly due to the limitations of a fixed window width chosen a priori. This paper presents a new approach for power quality analysis using a modified wavelet transform, known as S–transform and the analysis of several power quality problems using both S–transform as well as discrete wavelet transform validates the superiority of S–transform. ©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston Voltage sag nationallicence Voltage swell nationallicence S-transform nationallicence Wavelet transform nationallicence Momentary interruptions nationallicence Oscillatory transients nationallicence Reddy Jaya Bharata Electrical and Electronics Engineering Department, Birla Institute of Technology, Mesra, Ranchi-835215, India aut Mohanta Dusmanta Kumar Electrical and Electronics Engineering Department, Birla institute of Technology, Mesra, Ranchi 835215, India aut Karan B.M. Electrical and Electronics Engineering Department, Birla Institute of Technology, Mesra, Ranchi-835215, India aut International Journal of Emerging Electric Power Systems De Gruyter 1/2(2004-11-22) 1:2 2004 1 ijeeps https://doi.org/10.2202/1553-779X.1007 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.2202/1553-779X.1007 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Reddy Jaya Bharata Electrical and Electronics Engineering Department, Birla Institute of Technology, Mesra, Ranchi-835215, India aut NATIONALLICENCE 700 1- Mohanta Dusmanta Kumar Electrical and Electronics Engineering Department, Birla institute of Technology, Mesra, Ranchi 835215, India aut NATIONALLICENCE 700 1- Karan B.M. Electrical and Electronics Engineering Department, Birla Institute of Technology, Mesra, Ranchi-835215, India aut NATIONALLICENCE 773 0- International Journal of Emerging Electric Power Systems De Gruyter 1/2(2004-11-22) 1:2 2004 1 ijeeps CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter