Power Transformer and Environment Protection Enhancement

A. Zitouni

Abstract


The power transformer is considered not only as a vital and expensive component in power grid; but also the most dangerous element. Since it contains a great quantity of oil or gas SF6 in contact with high voltage elements, it may produce the risk of fire and explosion in case of abnormal circumstances or technical failures and hence affects on the envorinment. A differential protective relay that is very sensitive protection is generally used for protecting this power transformer. However, its operation may be affected by the disturbances such as inrush current, current transformer saturation and over-excitation due to external faults. Accordingly, false trips (mal-operation) of protective relay may be resulted in. This research work proposes root cause analysis based on fault tree analysis to be used for assessing disturbances that lead to false trips. When the critical root causes are identified, mitigation measures may be used. The model of security can help to quantify analytically the reliability of the considered protective relay and hence reinforcing it in order to reduce the failure risk. 


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References


Power Plant and Transmission System Protection Coordination, NERC Technical Report, July 2010.

Brunke, J. H.;. Fröhlich, J. K. Elimination of Transformer Inrush Currents by Controlled Switching. IEEE Transactions On Power Delivery, vol. 16 ( 2001) no. 2.

Guzmán, A.; Zocholl, S.; Altuve, H. Performance analysis of traditional and Improved differential Protective transformer relays. SEL Paper, (2000).

IEEE Standard C37.91- 2000. Guide for Protective Relay Applications to Power Transformers. The Institute of Electrical and Electronics Engineers, October (2000).

Bouderbala, R.; Bentarzi, H.; Ouadi, A. Digital Differential Relay Reliability Enhancement of Power Transformer. International Journal of Circuits, Systems and Signal processing 5 (2011) 263-270.

Bouderbala, R.; Bentarzi, H. Differential relay reliability enhancement using fourth harmonic for a large power transformer. International Journal of Syst. Assur. Engineering Mang., Springer, (2016).

Zitouni, A.; Ouadi, A.; Bentarzi, H. Measurement Quality Enhancement using Digital Filter in Power Grid integrating TCSC. EPE2015, Koutynad Desnou, Czech Republic, May 20 – 22, (2015).

Recioui, A.; Ouadi, A.; Bentarzi, H. Design of an IIR Digital Filter for Phasor Measurement Improvement Based on a Hybrid Optimization Algorithm. 3rd international conference on electric power end energy conversion systems, EPECS'2013, October 2-4, Istanbul, Turkey,( 2013).

Ouadi, A.; Bentarzi, H.; Recioui, A. Optimal Multi-Objective Design of Digital Filters Using Taguchi Optimization Technique. Journal of Electrical Engineering, Vol.65, N°1 (2014) 21-29.

Li, J.; Xie, X.; Xiao, J.; Wu, J. The framework and algorithm of a new phasor measurement unit. IEEE Int. Conf. on Elec. Util. Dereg., Restruc. And Power Tec. (DRPT2004), ( 2004) 826-831,.

Guzman, A.; Altuve, H.; Tziouvaras, D. Power Transformer Protection Improvements with Numerical Relays.

Mobley, R. K. Root cause failure analysis, Butterworth-Heinemann (1999).

Peng, P.; Liao, Z.; Wen, F.; Huang J. A Root-Cause-Analysis Based Method for Fault Diagnosis of Power System Digital Substations. In: Madani K., Dourado A., Rosa A., Filipe J. (eds) Computational Intelligence. Studies in Computational Intelligence, vol 465. Springer, Berlin, Heidelberg, (2013).

Haas, D.; Painter, F. D.; Wilkinson, M. Root-Cause Analysis of Simultaneous Faults on an Offshore FPSO Vessel. 59th Annual Petroleum and Chemical Industry Technical Conference, New Orleans, Louisiana, September 24–26, (2012).

Anderson, P. A.; Flemming, B.; Lee, T. J.; Schweitzer, E. O. Reliability Analysis of Transmission Protection Using Fault Tree Methods. Proceedings of the 24th Annual Western Protective Relay Conference, Washington, USA, (1997).

Sonalgaz Company internal report, Algiers, Algeria, (2013).

IEEE Power System Relay Committee Working Group I17 Report, Transmission Relay System Performance Comparison.

Moxley, R. Analyse relay fault data to improve service reliability. Schweitzer Engineering Laboratories, Inc. Pullman, WA USA, (2010).

Bogdan, K.; Ara, K. An Improved Transformer Inrush Restraint Algorithm Increases Security While Maintaining Fault Response Performance. 53rd Annual Conference for Protective Relay Engineers.

Phadke, A. G.; Thorp, J. S. Computer Relaying for Power Systems. New York: John Wiley and Sons, (1988).

Johns, A.T.; Salman, S.K. Digital protection for power system. IEE power series N° .15, London (1995).

Gavrilos, G.; Vitolina, S. Identification of Power Transformer’s Failure and Risk Sources. Proceeding of the 52th International Scientific Conference of RIGA Technical University on Power and Electrical Engineering, October (2011).


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