Comparison of Methods for Calculation of Core-Form Power Transformer’s Core Temperature Rise

The temperature rise calculation of core-type power transformers is an essential question in the design process however this is neglected during the preliminary optimization process. The methods of the calcula- tion methods are classified and introduced shortly and they applicability is examined for the preliminary design process. For comparison of the methods performance, two core arrangements were examined, the Roth’s transformer and a 50 MVA three-phase transformers’ core. The result shows that the FEM method provides the most accurate solution however according to its simplicity, the Ryder’s method has better performance in the preliminary design stage.

[1]  Gottfried Gotter.  Erwärmung und Kühlung elektrischer Maschinen , 1954 .

[2]  J. Cockcroft.  The temperature distribution in a transformer or other laminated core of rectangular cross section in which heat is generated at a uniform rate , 1925 .

[3]  Z. Andjelic,et al.  Applications of 3D Simulation to Solutions of Field Problems and Peformance Upgrades of Large Power Transformers , 2006, 2005/2006 IEEE/PES Transmission and Distribution Conference and Exhibition.

[4]  P. A. Abetti,et al.  Philosophy of applying digital computers to the design of electric apparatus , 1958, Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics.

[5]  Matthew N. O. Sadiku,et al.  Elements of Electromagnetics , 1989 .

[6]  S.A. Ryder,et al.  A simple method for calculating core temperature rise in power transformers , 2004, IEEE Transactions on Power Delivery.

[7]  B. Berger,et al.  An experimental approach to the cooling of transformer coils by natural convection , 1958 .

[8]  R. S. Girgis,et al.  Calculation of Core Hot-Spot Temperature in Power and Distribution Transformers , 2002, IEEE Power Engineering Review.

[9]  Antonios G. Kladas,et al.  Power transformer thermal analysis by using an advanced coupled 3D heat transfer and fluid flow FEM model , 2012 .

[10]  Zvonimir Valković.  SOME ASPECTS OF ADDITIONAL LOSSES IN STEP‐LAP JOINTS OF TRANSFORMER CORE , 1992 .

[11]  László Kiss,et al.  Large Power Transformers , 1987 .

[12]  H.M. Ryan.  High Voltage Engineering and Testing , 1995, IEEE Power Engineering Review.

[13]  E. Amoiralis,et al.  The state of the art in engineering methods for transformer design and optimization: a survey , 2008 .

[14]  E.I. Amoiralis,et al.  Transformer Design and Optimization: A Literature Survey , 2009, IEEE Transactions on Power Delivery.

[15]  Yan Li,et al.  Calculation and analysis of hot-spot temperature-rise of transformer structure parts based on magnetic-thermal coupling method , 2013, 2013 International Conference on Electrical Machines and Systems (ICEMS).

[16]  Bertrand Poulin,et al.  Transformer Design Principles: With Applications to Core-Form Power Transformers , 2001 .

[17]  Rudolf Küchler.  Die Transformatoren : Grundlagen für ihre Berechnung und Konstruktion , 1966 .

[18]  P. Hammond,et al.  Roth's method for the solution of boundary-value problems in electrical engineering , 1967 .

[19]  Sensitivity of Steady-State Temperatures of SF$_{6}$ Gas-Cooled-Insulated Power Transformers to Selected Parameters , 2009, IEEE Transactions on Power Delivery.

[21]  S. A. Khaparde,et al.  Transformer Engineering: Design and Practice , 2004 .

[22]  A. Rele,et al.  Cooling of Large Transformer Cores , 1972 .

[23]  A. Basak,et al.  Optimum Design of Transformer Cores by Analysing Flux and Iron Loss With the Aid of a Novel Software , 1992, Digest of the Fifth Biennial IEEE Conference on Electromagnetic Field Computation.

[24]  Pavlos S. Georgilakis,et al.  A Bibliographic Analysis of Transformer Literature 1990-2000 , 2012 .

[25]  Zoltan Adam Tamus,et al.  Metaheuristic Optimization Preliminary Design Process of Core-Form Autotransformers , 2016, IEEE Transactions on Magnetics.

[26]  Pavlos S. Georgilakis,et al.  A bibliographic analysis of transformer literature 2001-2010 , 2012 .

[27]  O. P. Rahi,et al.  Optimal Design of Power Transformer Using Genetic Algorithm , 2012, 2012 International Conference on Communication Systems and Network Technologies.