Power quality issues and minimization of Magnetizing Inrush Current by Controlled Switching in Three Phase Transformers
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International Journal of Engineering Trends and Technology (IJETT) |  |
| © 2019 by IJETT Journal | ||
| Volume-67 Issue-10 |
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| Year of Publication : 2019 | ||
| Authors : Renukadevi S. M. |
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| DOI : 10.14445/22315381/IJETT-V67I10P211 |
Citation
MLA Style: Renukadevi S. M. "Power quality issues and minimization of Magnetizing Inrush Current by Controlled Switching in Three Phase Transformers" International Journal of Engineering Trends and Technology 67.10 (2019):58-65.
APA Style:Renukadevi S. M.. Power quality issues and minimization of Magnetizing Inrush Current by Controlled Switching in Three Phase Transformers International Journal of Engineering Trends and Technology, 67(10),58-65.
Abstract
Three phase power Transformers are key equipment in power systems and power plants.Security,power quality and stability of three phase transformers are both important and necessary to system operation Energization of unloaded transformer results in magnetizing inrush current very often with high amplitude ,harmonic rich currents generated when transformer cores are driven into saturation .These currents have many unfavorable effects, including operation failure of transformer differential protection, deterioration of the insulation and mechanical support structure of windings and reduced power quality of the system. The inrush currents are always unbalanced among three phases. The amplitude of the magnetizing current depends mainly on two factors; the residual flux in the magnetic core and the transient flux produced by the integral of the sinusoidal supply voltage. To satisfy the principle of the flux steadiness, it is necessary to build an equalizing flux with the same magnitude, but opposite polarity to the prospective flux. Inrush currents from transformer and reactor energization have always been concern in power industry. So it is needed to find simpler and low cost scheme to limit these currents. Independent power producers are especially interested in such techniques. Different methods are used for minimizing the transient current. In this Simultaneous closing of circuit breaker and sequential closing of circuit breakers are used for reduce this large current Electric utilities and end users of electrical power are becoming increasingly concerned about the quality of electric power. A neutral resistor could provide some damping to the currents. The idea is further improved by introducing controlled energization of each phase of the transformer. The performance and characteristics of the proposed scheme is investigated using MAT LAB simulations.
Reference
[1] Allen Greenwood, ?Electrical Transients in Power Systems? Second edition,John Willey&Sons,Inc.NewYork,ISBN 978-0-471-62058-7
[2] C. Sankaran, ?Power Quality?, Taylor&Fransis Group, The Electric Power Engineering Series, ISBN-9780849310409, 216pp.
[3] Bharat Heavy Electricals Limited, ?Transformers?, Second edition, Tata McGraw-Hill,ISBN 0-07-048315-9,2007
[4] William.M.Flanagan, ?Hand book of Transformer Design &Applications? Second Edition ,MC Graw-Hill J.H.Brunke,K.J.Frohlich. ?Elimination of transformer inrush currents by controlled switching-Part I :Theoretical considerations? IEEE Trans. Power Del., vol.16, no.2, pp. 276-280, Apr.2001.
[5] J.H.Brunke ,K.J.Frohlich, ?Elimination of transformer inrush currents by controlled switching - Part II: Application and performance considerations? IEEE Trans.Power Del., vol.16, no.2, pp. 281-285, Apr.2001.
[6] Y.Cui, S.G. Abdulsalam, Y ?A sequential phase engergization technique for transformer inrush current reduction –part I: simulation and experimental result?,IEEE Transactions on power Delivery, Vol.20,No-2 April 2005,pp.943-949.
[7] Sami G. Abdulsalam, Wilsum XU, ?Analytical study of transformer Inrush current Transients and its applications? IPST05 in Montreal Canada on June19-23,2005 paper No.IPST05-140
[8] Paul C. Y. Ling, A. K. Al-Khalifah, ?Investigation of Magnetizing Inrush Current in a Single-Phase Transformer?, IEEE Transaction on Magnetics, vol. 24, No. 6, Nov. 1988, pp. 3217-3222.
[9] W. Xu, S.G. Abdulsalam, Y. Cui, S. and X. Liu, ?A Sequential Phase Energization Method for transformer inrush current reduction, Part II: Theoretical Analysis and Design Guide", IEEE Trans. Power Delivery, vol. 20, pp. 950-957, April 2005.
[10] Fleming J.A:?Experimental Researches on Alternate Current Transformers? Journel of the IEEE,Vol.21.sec V111(1892) pp.677-685.
[11] Chen Zhe, Wen Yuanfang, Lu Guojun ?Improved Modeling and Calculation on electctro magnetic transient of power Transformer.’’ IPEMC 2006
[12] Andreas Ebner ,ETH Zurich: ?Transient Transformer inrush currents due to Closing Time-and Residual Flux Measurements- Deviations if Controlled Switching is used.?-A real case study,cigre session 2002,N0.13-201.
[13] Laszlo Prikler, Gyorgy Banfai, Gabor Ban and Peter Becker, ?Reducing the Magnetizing Inrush current by means of Controlled Energization and de-Energization of Large Power Transformers,? International Conference on Power System Transients, IPST 2003.
[14] Juei-Lung- Shyru, Chung shan, ?A Novel control strategy to reduce transformer inrush current by series compensator?. IEEE proceedings Electric Power application Vol.151.pp 289-295, 2005.
[15] Li Dongxia, Wang Zanji, Liu Xiucheng ?Modeling and simulation of magnetizing inrush current of large power transformers?. Proceedings of POWERCON 2000, 4-7 December, 2000, Perth, Australia, pp795-800.
[16] K.P.Basu.Ali AsgharR. ?Reduction of magnetising inrush current in a delta connected transformer? .Conference on power electronics,Drives and Energy systems for Industrial Growth (PEDES2006), pp 1-4.
[17] Yacamini and H.Bronzeado, ?Transformer inrush calculation using a coupled electromagnetic model?, IEE Proc.Sci.Meas.Technol., V.141, No. 06, November/1994.
[18] A.C.Carvalho, J.H.Sawada, D.F.Peelo, ?Experiences with improving Power Quality by Controlled Switching.?CIGRE W G A 3.07.Seminar and workshop on controlled switching FL, USA, 7 May 2003.
[19] Liana Cipcigan,WilsunXu,Venkata Dinavahi, ?A New Technique to Mitigate Inrush Current Caused by Transformer Energization’’ in Proc. IEEE 2002 PES Summer meeting ,Chicago ,USA, Jul. 2002.
[20] A.L.J.Jansen, J.H.Brunke, W.Lanz ?Studies on the reliability of single pressure SF6-gas High voltage circuit Breakers.?IEEE Transactions on power delivery vol.11. No-1 January1996.
Keywords
Inrush current, power quality, controlled switching