DFT and Wavelet Based Smart Virtual Measurement and Assessment of Harmonics in Distribution Sector
This paper presents MATLAB based VI measurement for harmonics using DFT and WT. Results of both the techniques are compared and validated against the standard power analyzer. It is proved that DWT based VI have promising performance. For Data collection fifteen field visits are done to IT Industries, Steel Industries, Paper Industries, workshops etc. Sample of the readings are considered for analysis purpose. It is observed that the current harmonics generated are beyond the tolerable limits and many literatures are available in the area of Harmonic measurements but they do not have the capacity to identify the limits of harmonics as per the standards. In this paper GUI is developed in connection with MATLAB simulation to assess the harmonics and identify the normal and abnormal presence of harmonics with green and red colors respectively. Through this colour coding technique an unskilled worker can easily identify the objectionable presence of harmonics. It creates the awareness in the utility for measurement and control of harmonics which in turn helps to improve the PQ.
KeywordsDiscrete Fourier transform Wavelet transform Power quality Graphical user interface Virtual instrument
The project work is being carried out in Bharti Vidyapeeth Deemed University COE, Pune. The Authors wish to thank authorities of BVDUCOE, Pune for granting permission to publish the work. Special Thanks to MSEDCL and MSETCL for collection of data at Consumer end.
- 1.Fuchs, E.F., Masoum, M.A.S.: Power Quality in Power Systems and Electrical Machines. Academic Press, Waltham (2011)Google Scholar
- 2.Arrilaga, J., Watson, N.R.: Power System Harmonics, 1st edn. Wiley, Chichester (2004)Google Scholar
- 3.Dugan, R.C., McGrangahan, F.M.: Electrical Power System Quality, 2nd edn. Tata McGraw-Hill, New York (1996)Google Scholar
- 4.Rao, R.M., Bopardikar, A.S.: Wavelet Transforms-Introduction to Theory and Applications. Addison-Wesley Longman Inc., Massachusetts (1998)Google Scholar
- 5.IEEE Working Group.: IEEE Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems (1992)Google Scholar
- 6.IEC Working Group.: Testing and Measurement Techniques—General Guide on Harmonics and Interharmonics Measurement and Instrumentation, for Power Supply Systems and Equipment Connected Thereto, 2002. IEC 61000-4-7 (2002)Google Scholar
- 7.Waje, V.B., Gudaru, U.: Analysis of harmonics in power system using wavelet transform. In: IEEE Students Conference on Electrical, Electronics and Computer Science, pp. 1–5 (2012)Google Scholar
- 8.Chen, C., Yang, X., Xie, W.: A wavelet packet transform power harmonic detection method based on DSP and LabVIEW. In: IEEE Information and Automation (ICIA), pp. 2219–2214 (2010)Google Scholar
- 9.Alles, M.L., Schrimpf, R.D., Fleetwood, D.M., Pasternak, R., Tolk, N.H., Standley, R.W.: Experimental evaluation of second harmonic generation for non-invasive contamination detection in SOI wafers. In: Advanced Semiconductor Manufacturing Conference (ASMC), pp. 1–5 (2006)Google Scholar
- 10.Li, T., Chen, Y., Li, G.M.: An optimized method for electric power system harmonic measurement based on back-propagation neural network and modified genetic algorithm. In: Power Electronics Systems and Applications, pp. 1–5 (2009)Google Scholar
- 11.Xie, W., Yang, X.: A power harmonic measurement system based on wavelet packet transform and ARM9. In: Advanced Computer Control (ICACC), vol. 3, pp. 445–450 (2010)Google Scholar
- 12.Koch, A.S., Myrzik, J.M.A., Wiesner, T., Jendernalik, L.: Harmonic measurement and modeling for mass implementation of nonlinear appliances. In: IEEE Power and Energy Society General Meeting, pp. 1–6 (2012)Google Scholar