| DOI | Resolve DOI: https://doi.org/10.1109/ICDL.2019.8796825 |
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| Author | Search for: Hadjadj, Yazid1; Search for: Ghunem, Refat Atef1; Search for: Parks, Harold1 |
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| Affiliation | - National Research Council of Canada. Metrology Research Centre
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| Format | Text, Article |
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| Conference | 2019 IEEE 20th International Conference on Dielectric Liquids (ICDL), June 23-27, 2019, Roma, Italy |
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| Subject | polarization; depolarization current; high frequency component; power transformer; thermal transient; oil impregnated paper |
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| Abstract | Moisture in transformer paper insulation is one of the most important parameters to be monitored in order to assess the useful life of the transformer. Time domain spectroscopy based on polarization and depolarization current measurements is one of the methods that can be used for detection of moisture content in the transformer paper insulation. However, these measurements could be influenced by thermal transient during the application of voltage, which may lead to an inaccurate interpretation of the insulation condition. In this paper, a novel method is proposed in order to avoid this thermal transient effect by using the high frequency component of the of depolarization current acquired during the measurement. Preliminary results show a correlation between the high frequency component of the depolarization current waveform and the moisture content in the paper insulation within a moisture content range of about 3 %. At higher moisture content, a resistive leakage current seems to have a negative effect on the measured depolarization current. |
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| Publication date | 2019-08-15 |
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| Publisher | IEEE |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | a063af5d-f287-4983-808f-a66fbab972f1 |
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| Record created | 2019-09-26 |
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| Record modified | 2020-03-16 |
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