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Power System Disturbance Recognition Using Wavelet and S-Transform Techniques

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Published/Copyright: November 22, 2004
International Journal of Emerging Electric Power Systems
From the journal International Journal of Emerging Electric Power Systems Volume 1 Issue 2

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.
Published Online: 2004-11-22

©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston

Articles in the same Issue

  1. Article
  2. Non-Linear Pricing in Transmission Constrained Electricity Markets: A Congestion Rents Application
  3. Power System Disturbance Recognition Using Wavelet and S-Transform Techniques
  4. Design of a Fuzzy Sliding Mode Controller by Genetic Algorithms for Induction Machine Speed Control
  5. Available Transfer Capability Determination Using Power Transfer Distribution Factors
  6. A Novel Approach for Classifying Transient Phenomena in Power Transformers
  7. Component Model for Multi- Area Power Systems On-Line Economic Load Dispatch
https://doi.org/10.2202/1553-779X.1007
Keywords for this article
Voltage sag; Voltage swell; S–transform; Wavelet transform; Momentary interruptions; Oscillatory transients.

Articles in the same Issue

  1. Article
  2. Non-Linear Pricing in Transmission Constrained Electricity Markets: A Congestion Rents Application
  3. Power System Disturbance Recognition Using Wavelet and S-Transform Techniques
  4. Design of a Fuzzy Sliding Mode Controller by Genetic Algorithms for Induction Machine Speed Control
  5. Available Transfer Capability Determination Using Power Transfer Distribution Factors
  6. A Novel Approach for Classifying Transient Phenomena in Power Transformers
  7. Component Model for Multi- Area Power Systems On-Line Economic Load Dispatch
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