Determination of thermal distribution in compact substations
Subject Areas : Multimedia Processing, Communications Systems, Intelligent Systems
1 - Research Director
Keywords: compact substations, temperature rise, Finite elements, Transformer, ANSYS,
Abstract :
Transformers are one of the most important components of compact substations, and the study of their magnetic and thermal behavior inside compact substations is very important. Determining the thermal distribution inside transformers is often difficult due to the geometric complexity of the transformer structure, the dependence of the properties of the materials used on the temperature, and the nonlinearity of their magnetic behavior. In the meantime, the use of numerical methods such as finite elements is an efficient method to determine the thermal distribution inside the transformer and also to determine the maximum temperature of the transformer windings. In this dissertation, using magnetic and two-dimensional thermal analysis of finite elements by Ansys software, the thermal distribution of transformer windings in normal outdoor operation conditions and also in conditions where the transformer is located inside the compact post is determined and according to The temperature difference of the maximum temperature of the coils in the two conditions determines the thermal class of the compact substation.
[1] مجموعه کاتالوگهای شرکت توسعه پستهای ایران ترانسفو
[2] مجموعه کاتالوگهای شرکت ایران ترانسفو
[3] S. C. Bell, P. S. Bodger, “Power Transformer Design Using Magnetic Circuit Theory and Finite Element Analysis-A Comparison of Techniques,” Australia Power Electric Conference, 2007; 607-612.
[4] N.E. Mastorakis, C. A. Bulucea, M. C. Popescu, “Transformer Electromagnetic and Thermal Models,” 9th WSEAS International Conference on Power Systems,108-116.
[5] G. Swift, T.S. Molinski, R. Bray, A. Manzies, Fundamental Approach to Transformer Thermal Modeling-Part II: Field Verification,” IEEE Transactions on Power Delivery, vol. 16, no. 2, pp. 176-180, 2001.
[6] G. L. Alegi, W. Z. Black, “Real Time Thermal Model for An Oil-Immersed Forced-Air Cooled Transformer,” IEEE Transactions on Power Delivery, vol. 5, no. 2, pp. 991-999, 1990.
[7] W. H. Tang, O.H. Wu, Z. J. Richardson, Equivalent Heat Circuit Based Power Transformer Thermal Model,” IEE Proceedings-Electric Power Applications, vol. 149, no. 2, pp. 87-92, 2004.
[8] D. Susa, M. Lehtomen, H. Nordman H, “Dynamic Thermal Modeling of Power Transformers,” IEEE Transactions on Power Delivery, vol.20, no. 1, pp. 197-204, 2010.
[9] K. M. Takami, J. Mahmoudi, “Numerical Modeling of Heat Generation and Distribution in the Core and Winding of Power Transformers,” International Journal of Emerging Electric Power Systems, vol. 9, no. 2, pp. 75-90, 2010.
[10] J. Faiz, M. B. Sharifian, A. Fakhri, “Oil- Immersed Transformer Thermal Modeling,” Euro. Transaction Electric Power, vol. 18, pp. 577-594, 2012.
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