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Investigation of the Effect of Winding Clamping Structure on Frequency Response Signature of 11 kV Distribution Transformer

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  • Avinash Srikanta Murthy

    (Centre of Electromagnetics and Lightning Protection Research (CELP), Department of Electrical and Electronics Engineering, Faculty of Engineering, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia)

  • Norhafiz Azis

    (Centre of Electromagnetics and Lightning Protection Research (CELP), Department of Electrical and Electronics Engineering, Faculty of Engineering, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia
    Institute of Advanced Technology (ITMA), Department of Electrical and Electronics Engineering, Faculty of Engineering, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia)

  • Salem Al-Ameri

    (Faculty of Electrical and Electronics Engineering, Universiti Tun Hussein Onn Malaysia, Parit Raja, Johor 86400, Malaysia)

  • Mohd Fairouz Mohd Yousof

    (Faculty of Electrical and Electronics Engineering, Universiti Tun Hussein Onn Malaysia, Parit Raja, Johor 86400, Malaysia)

  • Jasronita Jasni

    (Centre of Electromagnetics and Lightning Protection Research (CELP), Department of Electrical and Electronics Engineering, Faculty of Engineering, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia)

  • Mohd Aizam Talib

    (TNB Research, Kajang, Selangor 43000, Malaysia)

Abstract

This paper presents an investigation on the sensitivity of frequency response of a 500 kVA, 11/0.433 kV distribution transformer with and without the presence of a winding clamping structure. Frequency response analysis (FRA) measurements of multiple test configurations were carried out with and without the presence of a winding clamping structure. Statistical analyses based on Pearson’s correlation coefficient (PCC), Spearman’s correlation coefficient (SCC), Kendall’s correlation coefficient (KCC), cross-correlation coefficient (CCF), root mean square error (RMSE), absolute sum of logarithmic error (ASLE), hypothesis test (F-test) and relative factor (RF) were applied to determine the effect of the winding clamping structure. It was found that the removal of the winding clamping structure has an impact on the frequency response signature at the frequency less than 2 kHz during offline measurement. It was found that ASLE and F-test are suitable methods that can be used to indicate the variation of frequency response caused by clamping structure removal of the distribution transformer under study.

Suggested Citation

  • Avinash Srikanta Murthy & Norhafiz Azis & Salem Al-Ameri & Mohd Fairouz Mohd Yousof & Jasronita Jasni & Mohd Aizam Talib, 2018. "Investigation of the Effect of Winding Clamping Structure on Frequency Response Signature of 11 kV Distribution Transformer," Energies, MDPI, vol. 11(9), pages 1-13, September.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:9:p:2307-:d:167272
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    References listed on IDEAS

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    1. Hauke Jan & Kossowski Tomasz, 2011. "Comparison of Values of Pearson's and Spearman's Correlation Coefficients on the Same Sets of Data," Quaestiones Geographicae, Sciendo, vol. 30(2), pages 87-93, June.
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    Cited by:

    1. Avinash Srikanta Murthy & Norhafiz Azis & Jasronita Jasni & Mohammad Lutfi Othman & Mohd Fairouz Mohd Yousof & Mohd Aizam Talib, 2020. "Extraction of winding parameters for 33/11 kV, 30 MVA transformer based on finite element method for frequency response modelling," PLOS ONE, Public Library of Science, vol. 15(8), pages 1-22, August.
    2. Szymon Banaszak & Konstanty Marek Gawrylczyk & Katarzyna Trela, 2020. "Frequency Response Modelling of Transformer Windings Connected in Parallel," Energies, MDPI, vol. 13(6), pages 1-13, March.

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