Degradation diagnosis of transformer insulating oils with terahertz time-domain spectroscopy
| Autor: | Seung Beom Kang, Won Seok Kim, Dong Chul Chung, Jong Man Joung, Min Hwan Kwak |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Terahertz radiation business.industry Transformer oil General Physics and Astronomy 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology 01 natural sciences Relaxation behavior law.invention law 0103 physical sciences Optoelectronics 0210 nano-technology Spectroscopy Terahertz time-domain spectroscopy business Transformer Refractive index |
| Zdroj: | Journal of the Korean Physical Society. 71:986-992 |
| ISSN: | 1976-8524 0374-4884 |
| DOI: | 10.3938/jkps.71.986 |
| Popis: | We report the frequency-dependent complex optical constants, refractive index and absorption, and complex dielectric properties over the frequency range from 0.2 to 3.0 THz for aged power transformer mineral insulating oils. These results have been obtained using terahertz time-domain spectroscopy (THz-TDS) and demonstrate the double-Debye relaxation behavior of the mineral insulating oil. The measured complex optical and dielectric characteristics can be important benchmarks for liquid molecular dynamics and theoretical studies of insulating oils. Due to clear differences in THz responses of aged mineral insulating oils, THz-TDS can be used as a novel on-site diagnostic technique to monitor the insulation condition in aged power transformers and may be valuable alternative to characterize other developing eco-friendly insulating oils and industrial liquids. |
| Databáze: | OpenAIRE |
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