The Transactions of the Korean Institute of Electrical Engineers B (대한전기학회논문지:전기기기및에너지변환시스템부문B)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

10kVA high $T_c$ Superconducting Power Transformer with Double Pancake Windings

더블팬케이크 권선형 10kVA 고온초전도 변압기

  • Published : 2001.02.01
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Abstract

This paper presents the design and test results of a 10kVA single phase HTS transformer which is operating at 77K. Double pancake windings with BSCCO -2223 HTS tape and GFRP cryostat with room temperature bore are used in the transformer. Four double pan cake windings were used in pancake windings are connected in parallel to conduct the secondary current of 45.4A. the rated voltages of each winding are 440/220V. Numerical calculation using Finite Element Method was used to evaluated the performance of each arrangement. Considering the magnetizing reactance, leakage reactance, electrical insulation and the circulating current in low voltage winding which had two windings in parallel, HLLH arrangement was finally chosen. Estimation of the AC loss, magnetizing loss and self field loss, in the design stage, where effects of perpendicular field and parallel field are considered. Room temperature bore type cryostat has been constructed and its heat loss was measured.

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References

  1. Sam P. Mehta, Nicola A versa, and Michael S. Walker, 'Transforming transformers,' IEEE Spectrum, Vol.34, No.7, pp. 43-49, July 1997 https://doi.org/10.1109/6.609815
  2. S.W.Schwenrerly, et al., 'Performance of a 1-MVA Demonstration Transformer,' IEEE Trans. Applied Superconductivity, Vol.9, No.2, pp.680-684, 1999 https://doi.org/10.1109/77.783387
  3. K. Funaki et al., 'Preliminary Tests of A 500kVA-Class Oxide Superconducting Transformer Cooled by Subcooled Nitrogen,' Trans. on IEEE Applied Superconductivity, Vol.7, No.2, pp.824-827, 1997 https://doi.org/10.1109/77.614630
  4. J. Lee, W. Kim, K. Choi, S. Hahn, G. Cha and S. Chang, 'Development of a Three Phase 100kVA Superconducting Power Transformer with Amorphous Core,' IEEE, Trans. Applied Superconductivity, Vol.9, No.2, 1999, pp.1293-1296 https://doi.org/10.1109/77.783538
  5. J.K.Sykulski, et al., 'Design and Construction of an High Temperature Superconducting Transformer,' ICEM'98, Istanbul, Turkey, pp.971-975, Sept., 1998
  6. C. P. Bean, 'Magnetization of Hard Superconductor,' Physical Review Letters, Vol.8, No.6, pp.250-253, 1962 https://doi.org/10.1103/PhysRevLett.8.250
  7. Martin N. Wilson, Clareadon Press, Oxford, Superconducting Magnets, pp.159-199, 1983
  8. W.T.Norris, 'Calculation of Hysteresis Losses in Hard Superconductors carrying AC: isolated conductors and edges of thin sheets,' Jour. of Physics. D, vol.3, pp.489-507, 1970 https://doi.org/10.1088/0022-3727/3/4/308