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Analysis on the magnetic shunt structure of large power transformer

Analysis on the magnetic shunt structure of large power transformer

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Installing magnetic shunts on the surfaces of tank and clamps of power transformer is able to reduce the eddy current losses and decrease the temperature rise effectively. Here, the three-dimensional transient finite element method and the magnetic thermal coupling method are used to calculate and analyse the effect of magnetic shunts with different structures. The non-linear magnetic property of both the transformer structural parts and the magnetic shunts are considered in the analysis. The lamination structure of the shunt is also considered, which is simulated by a thick plate with anisotropic magnetic property. A 334 MVA single-phase transformer is taken as an example in the analysis. The optimisation shunt structure is obtained. By comparing the L-shaped, the inverted L-shaped, and the U-shaped magnetic shunts for the clamps, it is proved that the U-shaped shunt is more effective in reducing the eddy current loss and temperature rise.

References

    1. 1)
      • 1. Kumbhar, G.B., Mahajan, S.M., Collett, W.L.: ‘Reduction of loss and local overheating in the tank of a current transformer’, IEEE Trans. Power Deliv., 2010, 25, (4), pp. 25192525.
    2. 2)
      • 2. Olivares, J.C., Escarela-Perez, R., Kulkarni, S.V., et al: ‘Improved insert geometry for reducing tank-wall losses in pad-mounted transformers’, IEEE Trans. Power Deliv., 2004, 19, (3), pp. 11201126.
    3. 3)
      • 3. Lotfi, A., Høidalen, H.K., Agheb, E., et al: ‘Characterization of magnetic losses in the transformer tank steel’, IEEE Trans. Magn., 2016, 52, (5), p. 6301104.
    4. 4)
      • 4. Song, Z., Wang, Y., Mou, S., et al: ‘Tank losses and magnetic shunts in a three phase power transformer’. Int. Conf. on Electrical Machines and Systems (ICEMS), Beijing, China, August 2011.
    5. 5)
      • 5. de Leon, F., Semlyen, A.: ‘Detailed modeling of eddy current effects for transformer transients’, IEEE Trans. Power Deliv., 1994, 9, (2), pp. 11431150.
    6. 6)
      • 6. Rizzo, M., Savini, A., Turowski, J.: ‘Influence of flux collectors on stray losses in transformers’, IEEE Trans. Magn., 2000, 36, (4), pp. 19151918.
    7. 7)
      • 7. Yan, X., Yu, X., Shen, M., et al: ‘Research on calculating eddy-current losses in power transformer tank walls using finite-element method combined with analytical method’, IEEE Trans. Magn., 2016, 52, (3), p. 6300704.
    8. 8)
      • 8. Holland, S., O'Connell, G.P., Haydock, L.: ‘Calculating stray losses in power transformers using surface impedance with finite elements’, IEEE Trans. Magn., 1992, 28, (2), pp. 13551358.
    9. 9)
      • 9. Milagre, A.M., Ferreira Da Luz, M.V., Cangane, G.M., et al: ‘3D calculation and modeling of eddy current losses in a large power transformer’. Int. Conf. on Electrical Machines (ICEM), Marseille, France, 2012, pp. 22822286.
    10. 10)
      • 10. Li, Y., Eerhemubayaer, , Sun, X., et al: ‘Calculation and analysis of 3-D nonlinear eddy current field and structure losses in transformer’. Int. Conf. on Electrical Machines and Systems (ICEMS), Beijing, China, August 2011.
    11. 11)
      • 11. Zhang, Y., Yan, B., Cao, F., et al: ‘Analysis of eddy current loss and local overheating in oil tank of a large transformer using 3-D FEM’. Int. Conf. on Electrical Machines and Systems (ICEMS), Beijing, China, August 2011.
    12. 12)
      • 12. Maximov, S., Olivares-Galvan, J.C., Magdaleno-Adame, S., et al: ‘New analytical formulas for electromagnetic field and eddy current losses in bushing regions of transformers’, IEEE Trans. Magn., 2015, 51, (4), p. 6300710.
    13. 13)
      • 13. Ho, S.L., Li, Y., Tang, R.Y., et al: ‘Calculation of eddy current field in the ascending flange for the bushings and tank wall of a large power transformer’, IEEE Trans. Magn., 2008, 44, (6), pp. 15221525.
    14. 14)
      • 14. Li, L., Fu, W.N., Ho, S.L., et al: ‘Numerical analysis and optimization of lobe-type magnetic shielding in a 334 MVA single-phase auto-transformer’, IEEE Trans. Magn., 2014, 50, (11), p. 8500504.
    15. 15)
      • 15. Moghaddami, M., Sarwat, A.I., de Leon, F.: ‘Reduction of stray loss in power transformers using horizontal magnetic wall shunts’, IEEE Trans. Magn., 2017, 53, (2), p. 8100607.
    16. 16)
      • 16. Susa, D., Palola, J., Lehtonen, M., et al: ‘Temperature rises in an OFAF transformer at OFAN cooling mode in service’, IEEE Trans. Power Deliv., 2005, 20, (4), pp. 25172525.
    17. 17)
      • 17. Farahmand, F., Dawson, F.P., Douglas Lavers, J.: ‘Temperature rise and free-convection heat-transfer coefficient for two-dimensional pot-core inductors and transformers’, IEEE Trans. Ind. Appl., 2009, 45, (6), pp. 20802089.
    18. 18)
      • 18. Susa, D., Nordman, H.: ‘A simple model for calculating transformer hot-spot temperature’, IEEE Trans. Power Deliv., 2009, 24, (3), pp. 12571265.
    19. 19)
      • 19. Li, J., Luo, L., Xu, J.: ‘Finite element analysis of the 3D thermal field of main transformer oil tank of electric locomotive’, High Volt. Eng., 2005, 31, (8), pp. 2123.
    20. 20)
      • 20. Cheng, Z., Takahashi, N., Forghani, B., et al: ‘Electromagnetic and thermal field modeling and application in electrical engineering’ (Beijing Science Press, Beijing, China, 2009, 1st edn.).
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