Volume 26, Issue 12 pp. 2552-2572
Research Article

Wavelet-based technique for identification of harmonic source in distribution system

Pampa Sinha

Corresponding Author

Pampa Sinha

Electrical Engineering Department, Netaji Subhash Engineering College, Techno City, Garia, Kolkata, 700152 India

Correspondence to: Pampa Sinha, Electrical Engineering Department, Netaji Subhash Engineering College, Techno City, Garia, Kolkata 700152, India.

E-mail [email protected]

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Swapan Kumar Goswami

Swapan Kumar Goswami

Electrical Engineering Department, Jadavpur University, Kolkata, India

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Sudipta Nath

Sudipta Nath

Electrical Engineering Department, Jadavpur University, Kolkata, India

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First published: 11 May 2016
Citations: 14

Summary

A new method to identify the location and nature of the harmonic generating sources in a distribution system has been proposed. The method is based on wavelet decomposition of voltage and current signals at the point of measurement. Detail reactive power at level 1 of wavelet decomposition has been used. A harmonic generating load is identified by extracting its characterizing harmonics in the power system signals. The pseudo-frequency for the wavelet decomposition at level 1 is set at the characteristic frequency of the load, and the sampling frequency is so chosen that the desired harmonic information can be extracted at the detail level 1. Power systems signals are, however, captured at a higher sampling frequency. For the identification of the disturbing source, the required sampling frequency for level 1 decomposition is obtained using downsampling on the captured data. Applicability of the method has been demonstrated for both radial and non-radial power system networks. Copyright © 2016 John Wiley & Sons, Ltd.

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