The Transactions of the Korean Institute of Electrical Engineers C (대한전기학회논문지:전기물성ㆍ응용부문C)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

Evaluation of Insulating Oil by Terahertz Time Domain Spectroscopy

테라헤르츠파 분광법에 의한 절연유 특성 평가

  • 김근주 (한국전기연구원 THz파 전문연구랩) ;
  • 전석기 (한국전기연구원 THz파 전문연구랩) ;
  • 선종호 (한국전기연구원 전력설비진단그룹) ;
  • 진윤식 (한국전기연구원 THz파 전문연구랩)
  • Published : 2006.08.01
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Abstract

A new method on the evaluation of insulation oil was proposed. Terahertz time-domain spectroscopy (THz-TDS) was applied to investigate the properties of the insulating oil. For the diagnostics of oil degradation, three kinds of oils have been analyzed by THz-TDS. The degraded oil showed different optical and electrical constants compared with a new one. Generally, the power absorption coefficient, the refractive index, the dielectric constant and loss $tan{\delta}$ of the oil increase as the aging of insulating oil proceed. And the characteristics of two kind of insulation oil, 1-4 and 7-4, was compared in terahertz spectral region. Difference in refractive index and complex dielectric constant has been observed between the samples. The results of this study suggest that THz-TDS is a promising new means for evaluating degradation and identification of insulating oil.

Keywords

References

  1. V. G. Arakelian, 'The Long Way to the Automatic Chromatographic Analysis of Gases Dissolved in Insulating Oil', IEEE electrical insulation magazine : a publication of the IEEE Electrical Insulation Society, Vol. 20, No.6, pp. 8-25, 2004 https://doi.org/10.1109/MEI.2004.1367506
  2. Kan. H., Miyamoto. T., Makino. Y., Namba. S., Hara. T., 'Absorption of C02 and CO gases and furfural in insulating oil into paper insulation in oil-immersed transformers', Electrical Insulation Conference Record of the 1994 IEEE International Symposium on, pp. 41-44, 1944 https://doi.org/10.1109/ELINSL.1994.401472
  3. Nagamune. K., Kobashi. S., Kondo. K., Rata. Y., Taniguchi. K., 'An ultrasonic evaluation for degradation Ultrasonics of insulating oil using fuzzy inference', 2003 IEEE Symposium on, pp. 893-896, 2003 https://doi.org/10.1109/ULTSYM.2003.1293543
  4. Hosier. I.L., Vaughan. A.S., Sutton. S.J., Davis. F.J., 'Chemical and physical properties of aged dodecylbenzene insulating oil' Electrical Insulation and Dielectric Phenomena, 2005, pp. 225-228, 2005 https://doi.org/10.1109/CEIDP.2005.1560662
  5. Aka-Ngnui. T., Benounis. M., Jaffrezic-Renault. N., Stevenson. I., Beroual. A., 'In situ monitoring of the degradation of insulating oil under AC voltage', Electrical Insulation and Dielectric Phenomena, 2005, pp. 253-256, 2005 https://doi.org/10.1109/CEIDP.2005.1560669
  6. Tae-In jeon and D. Grischkowsky, 'Nature of Conduction in Doped Silicon', Phys, Rev. Lett., Vol. 78, pp. 1106-1109, 1997 https://doi.org/10.1103/PhysRevLett.78.1106
  7. G. Gallot, Jiangquan Zhang, R. W. McGowan, Tae-In. Jeon, and D. Grischkowsky, 'Measurements of the THz absorption and dispersion of ZnTe and their relevance to the electro-optic detection of THz radiation', Appl, Phys. Lett., Vol. 74., pp, 3450-3452, 1999 https://doi.org/10.1063/1.124124
  8. Al-Douseri, F.M., Liu, Haibo, Jin Yun-Sik, Chen, Yunqin, Zhang, X.C, 'Applications of THz-time domain spectroscopy and far-infrared Fourier transform spectroscopy on petroleum products analysis', Infrared and Millimeter Waves, 12th International Conference on Terahertz Electronics, 2004. pp. 401-402, 2004 https://doi.org/10.1109/ICIMW.2004.1422131
  9. D. Dragoman and M. Dragoman, 'Terahertz fields and applications', Prog. Quantum Electronics, Vol. 28, pp. 1-66, 2004 https://doi.org/10.1016/S0079-6727(03)00058-2
  10. Stephen E. Ralph and D. Grischkowsky, 'Trap-enhanced electric fields in semi-insulators : The role of electrical and optical carrier injection', Appl, Phys. Lett. Vol. 59. pp. 1972-1974, 1991 https://doi.org/10.1063/1.106153
  11. 진윤식, 김근주, 손채화, 정순신, 김지현, 전석기, '광전도 안테나에 의한 광대역 테라헤르츠파의 발생특성' Trans. KIEE. Vol. 54C, pp. 286-292, 2005
  12. Q. Wu and X.-C. Zhang, 'Free-Space Electro-Optic Sampling of Terahertz Beam', Appl, Phys. Lett. Vol. 67, pp. 3523, 1995 https://doi.org/10.1063/1.114909
  13. 진윤식, 전석기, 김근주, 손채화, 정순신, 'ZnTe결정을 이용한 테라헤르츠파의 발생 및 검출특성' 한국광학회지, 제16권 제6호, pp. 553-599, 2005 https://doi.org/10.3807/KJOP.2005.16.6.553
  14. S.P.Mickan and X.-C. Zhang, 'T-Ray Sensing and Imaging', Int'l J. High Speed Electronics and systems, Vol. 13, pp. 601-676, 2003 https://doi.org/10.1142/S0129156403001843
  15. 講談社 サイエンティフィク, '電氣絶緣油ハンドブック石油學會/編' Chapter 1, 1989