Diagnosis of Power Quality Disturbances Using Wavelet Transforms

M. Sushama*, **, Dr. A. Jaya Laxmi***
*,*** Associate Professors, Department of Electrical and Electronics Engineering, JNTU college of Engineering, Hyderabad, INDIA.
** Professor, Department of Electrical and Electronics Engineering, JNTU college of Engineering, Hyderabad, INDIA.
Periodicity:April - June'2010
DOI : https://doi.org/10.26634/jee.3.4.1186


A new method for detection of power quality disturbance is proposed: first, the original signals are de-noised by the wavelet transform; second, the beginning and ending time of the disturbance can be detected in  time, third, determining the cause of power quality disturbances using various approaches such as Multi Resolution Analysis (MRA) or Discrete Wavelet Transforms (DWT) In this paper, wavelet transform is proposed to identify the power quality disturbance at its instance of occurrence. Power quality disturbances like sag, swell, interruption, DC offset, frequency variation and harmonics are considered and are decomposed up to 4 levels using Db4 wavelet. For some disturbances it is sufficient to have only second or third level of decomposition. The exact location of the disturbance can also be found on the time scale. The application to a case study shows that this method is fast, sensitive, and practical for detection and identification of power quality disturbance.


Power Quality (PQ), Multi Resolution Analysis (MRA), Daubechies (Db), Discrete Wavelet Transform (DWT).

How to Cite this Article?

M. Sushama, G. Tulasi Ram Das and A. Jaya Laxmi(2010). Diagnosis Of Power Quality Disturbances Using Wavelet Transforms. i-manager’s Journal on Electrical Engineering. 3(4) Apr-Jun 2010, Print ISSN 0973-8835, E-ISSN 2230-7176, pp. 29-34. https://doi.org/10.26634/jee.3.4.1186


[1]. M. Sushama, G. Tulasi Ram Das, A.Jaya Laxmi “Mitigation of Voltage Sags with Dynamic Voltage Restorer Using Wavelets” Presented at the International Confernce nd th “RACE2007” during MAR 22 -24 2007.
[2]. C. Sidney Bums, Ramesh A. Gopinath, Haitao Guo, “Introduction to Wavelets and Wavelet Transforms”. 1998.
[3]. O. Rioul and M. Vetterli, "Wavelets and Signal Processing," IEEE Signal Processing Magazine, Vol. 8, pp. 14-38, Oct. 1991.
[4]. Jaideva C. Goswami, Andrew K. Chan, “Fundamentals of Wavelets, Theory, Algorithms, and Applications”, 1999, IPEC, Tokyo, 1983, 1375-1382.EPE 1991, pp3-030 to 3-035.
[5]. M. Misiti, Y. Misiti, G. Oppenheim and J.-M Poggi, Wavelet Toolbox For Use With Matlab: User's guide version 3., Mathworks Inc., 2006.
[6]. M. Karimi, et al, “Wavelet based on-line disturbance detection for power quality applications,” lEEE Trans. on Power Delivery, 01.15, No. 4, pp.1212-1220 OCT'2000.
[7]. S. Santoso, et al, “Power quality assessment via wavelet transform analysis,” IEEE Trans. an Power Delivery, Vol.11, No. 2, pp. 924- 930, April 1996.
[8]. M. H. J. Bollen, “Understanding Power Quality Problems”. Piscataway,NJ: IEEE Press, 2000.
[9]. W. A. Wilkinson and M. D. Cox, “Discrete wavelet analysis of power system transients,” IEEE Trans. Power Syst., Vol. 11, No. 4, pp. 2038–2044, Nov. 1996.

Purchase Instant Access

Single Article

North Americas,UK,
Middle East,Europe
India Rest of world
Pdf 35 35 200 20
Online 35 35 200 15
Pdf & Online 35 35 400 25

If you have access to this article please login to view the article or kindly login to purchase the article
Options for accessing this content:
  • If you would like institutional access to this content, please recommend the title to your librarian.
    Library Recommendation Form
  • If you already have i-manager's user account: Login above and proceed to purchase the article.
  • New Users: Please register, then proceed to purchase the article.