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Article
Power System Disturbance Recognition Using Wavelet and S-Transform Techniques
International Journal of Emerging Electric Power Systems (2010)
  • Jaya Bharata Reddy
  • Dusmanta Kumar Mohanta
  • B.M. Karan
Abstract
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.
Keywords
  • Voltage sag,
  • Voltage swell,
  • S–transform,
  • Wavelet transform,
  • Momentary interruptions,
  • Oscillatory transients.
Publication Date
March 31, 2010
Citation Information
Jaya Bharata Reddy, Dusmanta Kumar Mohanta and B.M. Karan. "Power System Disturbance Recognition Using Wavelet and S-Transform Techniques" International Journal of Emerging Electric Power Systems Vol. 1 Iss. 2 (2010)
Available at: http://works.bepress.com/dusmanta_mohanta/2/