Browse > Article

Evaluation of Insulating Oil by Terahertz Time Domain Spectroscopy  

Kim Geun-Ju (한국전기연구원 THz파 전문연구랩)
Jeon Seok-Gy (한국전기연구원 THz파 전문연구랩)
Sun Jong-Ho (한국전기연구원 전력설비진단그룹)
Jin Yun-Sik (한국전기연구원 THz파 전문연구랩)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers C / v.55, no.8, 2006 , pp. 411-416 More about this Journal
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
Terahertz Time-Domain Spectroscopy; Terahertz Wave; Insulating Oil; Refractive Index; Absorption; Dielectric Constant;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 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   DOI   ScienceOn
2 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
3 Q. Wu and X.-C. Zhang, 'Free-Space Electro-Optic Sampling of Terahertz Beam', Appl, Phys. Lett. Vol. 67, pp. 3523, 1995   DOI
4 진윤식, 전석기, 김근주, 손채화, 정순신, 'ZnTe결정을 이용한 테라헤르츠파의 발생 및 검출특성' 한국광학회지, 제16권 제6호, pp. 553-599, 2005   과학기술학회마을   DOI
5 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   DOI
6 D. Dragoman and M. Dragoman, 'Terahertz fields and applications', Prog. Quantum Electronics, Vol. 28, pp. 1-66, 2004   DOI   ScienceOn
7 Tae-In jeon and D. Grischkowsky, 'Nature of Conduction in Doped Silicon', Phys, Rev. Lett., Vol. 78, pp. 1106-1109, 1997   DOI   ScienceOn
8 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   DOI
9 진윤식, 김근주, 손채화, 정순신, 김지현, 전석기, '광전도 안테나에 의한 광대역 테라헤르츠파의 발생특성' Trans. KIEE. Vol. 54C, pp. 286-292, 2005   과학기술학회마을
10 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   DOI
11 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   DOI
12 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   DOI   ScienceOn
13 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   DOI
14 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   DOI
15 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   DOI