A novel approach to transformer differential protection using sequence component based algorithm

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Published Sep 2, 2015
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Volume 11, Issue 3, September 2015

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Dharmesh D. Patel
Research Scholar, Department of Electrical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat - 395007
K. D. Mistry
Assistant Professor, Department of Electrical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat-395007
N. G. Chothani
Associate Professor, Department of Electrical Engineering, A. D. Patel Institute of Technology, New Vallabh Vidhyanagar - 388121

Abstract

This paper presents a new unit type protection for power transformer by combining differential protection and phase angle comparison of sequence components of currents. The simple differential protection scheme alone may ma-operation during current transformer (CT) saturation and high resistance internal fault conditions. Hence, the sequence component based phase angle comparison technique is combined with percentage biased differential protection scheme. Discrete Fourier Transform (DFT) is used to calculate the phase angles of sequence components and harmonics of primary and secondary current signals of transformer. Low pass butter worth filter is used to correct the current signals before passing it to DFT. During internal fault, the phase angle difference of primary and secondary current is very low whereas large angle difference observed during external fault/other conditions. The performance of the proposed algorithm has been evaluated by considering various transformer and system parameters. Numerous simulations are carried out on three phase power transformer using PSCAD/EMTDCTM software to validate the technique. The proposed algorithm perfectly distinguishes internal fault and external fault condition. Moreover, various situations such as magnetizing inrush current, high resistance internal fault and CT saturation conditions are also tested for validation.

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How to Cite
Patel, D. D., Mistry, K. D., & Chothani, N. G. (2015). A novel approach to transformer differential protection using sequence component based algorithm. Power Research - A Journal of CPRI, 517–530. Retrieved from https://node6473.myfcloud.com/~geosocin/CPRI/index.php/pr/article/view/708

References

  1. H W Beaty, Handbook of Electric Power Calculations, Third edition, McGRAW-hill, USA, 2001.
  2. A Hosny and V K Sood, Transformer differential protection with phase angle difference based inrush restraint, Electr. Power Syst. Res., Vol. 115, pp. 57-64, 2014.
  3. S Wagh, S Kumar and V Sreeram, Extraction of DC component and harmonic analysis for protection of power transformer, 8th IEEE Conf. on ICIEA, held at MelbourneVIC, pp. 32-37, 2013.
  4. E Madzikanda and M Negnevitsky, A practical look at harmonics in power transformer differential protection, IEEE Int. Conf. on POWERCON, held at Auckland, pp. 1-6, 2012.
  5. A Hooshyar, S A fsharnia, M S Pasand and B M Ebrahimi, A new algorithm to identify magnetizing inrush conditions based on instantaneous frequency of differential power signal, IEEE Trans. PD, Vol. 25, pp. 2223-2233, 2010.
  6. A Guzman, S Zochol, G Benmouyal, and H Altuve, A current-based solution for transformer differential protection. Part I: Problem statement, IEEE on Power Engineering Review, Vol. 21, pp. 61-61, 2001.
  7. A Guzman, S Zocholl, G Benmouyal, and H J Altuve, A current-based solution for transformer differential protection. II. Relay description and evaluation, IEEE Trans. PD, Vol. 17, pp. 886-893, 2002.
  8. B A Fakhri, A unique transformer protection which eliminates over-voltage, over-fluxing, and CT saturation protection, in Transmission and Distribution Conf. and Exhibition, Asia Pacific. IEEE /PE S, pp. 142-147, 2002.
  9. K Narendra, D Fedirchuk, N Zhang, R Midence, N Perera, and V Sood, Phase angle comparison and differential rate of change methods used for differential protection of busbars and transformers, in 2011 IEEE Electrical Power and Energy Conf. (EPEC ), held at Winnipeg-MB , pp. 134-139, 2011.
  10. U N Khan and T S Sidhu, A Phase-Shifting Transformer Protection Technique Based on Directional Comparison Approach, IEEE Trans. PD, Vol. 29, pp. 2315-2323, 2014.
  11. M Ahmadi, H Samet, and T Ghanbari, Discrimination of internal fault from magnetising inrush current in power transformers based on sine-wave leastsquares curve fitting method, IET Science, Measurement & Technology, Vol. 9, pp. 7384, 2014.
  12. R Hamilton, Analysis of transformer inrush current and comparison of harmonic restraint methods in transformer protection, IEEE Transactions on Industry Applications, Vol. 49, pp. 1890-1899, 2013.
  13. C Jettanasen and A Ngaopitakkul, The spectrum comparison technique of DWT for discriminating between external fault and internal fault in power transformer, Journal of International Council on Electrical Engineering, Vol. 2, pp. 302-308, 2012.
  14. Z Moravej and A Abdoos, An improved fault detection scheme for power transformer protection, Electr Power Compon Syst, Vol. 40, pp. 1183-1207, 2012.
  15. M A Shaher and M Saied, Recognition and location of transformer winding faults using the input impedance, Electr Power Compon Syst, Vol. 35, pp. 785-802, 2007.
  16. M Tripathy, R. Maheshwari, and H. Verma, Advances in transformer protection: a review, Electr Power Compon Syst, Vol. 33, pp. 1203-1209, 2005.
  17. B Fani, M E H Golshan, and H A Abyaneh, Waveform feature monitoring scheme for transformer differential protection, Journal of Zhejiang University Science, Vol. 12, pp. 116-123, 2011.
  18. PSCAD/EMTDCTM User’s Manual: Version-4.2, Manitoba HVDC Research Centre, Winnipeg, MB , Canada, 2005.
  19. W D Stevenson Jr., Element of Power system Analysis, Forth Edition, McGrawHill, chapter-12, Singapore, 1982.
  20. N Chothani and B Bhalja, Development of a New Bus Zone Identification Algorithm Based on Phase Angle Comparison Using Sequence Components of Currents, Electr Power Compon Syst, Vol. 42, pp. 215-226, 2014.
  21. B Bhalja, N Chothani and R P Maheshwari, protection and switchgear, Oxford university press, 2011.