Dielectric spectroscopy and gas chromatography methods applied on high-voltage transformer oils |
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| Authors: | Dervos CT Paraskevas CD Skafidas PD Stefanou N |
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| Affiliation: | Dept. of Electr. & Comput. Eng., Nat. Tech. Univ. of Athens, Greece; |
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| Abstract: | This paper points out the advantages offered by the temperature dependent dielectric spectroscopy in frequency domain, as an additional diagnostic technique for insulation testing of power transformers for life-time prediction. Complex permittivity measurements have been carried out as a function of operating frequency and oil temperature for a wide selection of high voltage transformers and the gaseous byproduct concentrations were also monitored. The work correlates dielectrometry data to the gas chromatography ones. |
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