Insulating Design and Test of 22.9kV Class Mini-Model Transformer Considering AC Loss

AC Loss를 고려한 22.9kV급 Mini-Model 변압기의 절연 설계 및 시험

  • 백승명 (경상대 전기전자공학부) ;
  • 정종만 (한국전력공사 전력연구원 배전기술그) ;
  • 곽동순 (경상대 전기전자공학) ;
  • 김해종 (한국전기연구원 초전도응용연구그) ;
  • 석복렬 (현대중공업 기계전기연구) ;
  • 김상현 (경상대 전기전자공학부)
  • Published : 2004.08.01


This paper presents experimental data from model windings with different arrangement of coil in order to provide information to design a 22.9kV class HTS transformer. Before experiment, the composite insulation of two different type of HTS transformers are investigated. The first basic of investigation is a breakdown characteristic of liquid nitrogen and flashover characteristic on the GFRP surface under ac and impulse, The second investigation is insulation design, manufacture and test of model windings. These include a AC withstand voltage test of 50 kV rms and a lighting impulse test of 150 kV at peak.


  1. M. Polak, P. Usak, J. Pitel, L. Jansak, Z. Timoransky, F. Zizdl, and H. Piel, 'Comparison of Solenoidal and Pancake Model windings for a Superconducting Transformer', IEEE Transaction on Applied Superconductivity, Vol. 11, No. 1, pp. 1478-1481, 2001
  2. Ho-Myung Chang, Yeon Suk Choi, Steven W. Van Sciver, and Thomas L. Baldwin, 'Cryogenic Cooling Temperature of HTS Transformers for Compactness and Efficiency', IEEE Transaction on Applied Superconductivity, Vol. 13, No. 2, pp. 1478-1481, 2003
  3. S. H. Kim, W. S. Kim, J. T. Kim, K. D. Choi, H. G. Joo, G. W. Hong, J. H. Han, S. J. Lee and S. Hahn, 'Assembling and Insulation Test of IMVA Single Phase HTS Transformer for Power Distribution', Journal of the Korea Institute of Applied Superconductivity and Cryogenics, Vol. 5, No. 3, pp. 30-33, 2003
  4. S.W.Schwenterly, et al., 'Development of HTS power transformers for the 21st century: Waukesha Electric Systems/IGC-SuperPower/RG&E/ORNL SPI collaboration', Physica C 382, pp. 1-6, 2002
  5. B.W. McConnell, 'Transformers - A successful Application of High Temperature Supereconductors', IEEE Transation on Applied Superconductivity, Vol. 10, No. 1, pp. 716-720, 2000
  6. Osami Tsukamoto, et al, 'Overview of R&D activities on application of superconductivity to power apparatus in Japan', Cryogenics 42, pp. 337-344, 2002