Cellulose Ester Insulation of Power Transformers:Researching the Influence of Moisture on the PhaseShift Angle and Admittance
Artykuł w czasopiśmie
MNiSW
140
Lista 2021
| Status: | |
| Autorzy: | Żukowski Paweł, Rogalski Przemysław, Kołtunowicz Tomasz, Kierczyński Konrad, Subocz Jan, Zenker Marek |
| Dyscypliny: | |
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| Rok wydania: | 2020 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 20 |
| Wolumen/Tom: | 13 |
| Numer artykułu: | 5511 |
| Strony: | 1 - 19 |
| Web of Science® Times Cited: | 9 |
| Scopus® Cytowania: | 13 |
| Bazy: | Web of Science | Scopus |
| Efekt badań statutowych | NIE |
| Finansowanie: | This research was partially supported by the Polish Ministry of Science and Higher Education as a science fund of the Lublin University of Technology, at the Faculty of Electrical Engineering and Computer Science, FN-28/E/EE/2020. Research of electrical, magnetic, thermal, and mechanical properties of modern electrotechnical and electronic materials, including nanomaterials and diagnostic of electrical devices and their components. |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | TAK |
| Licencja: | |
| Sposób udostępnienia: | Witryna wydawcy |
| Wersja tekstu: | Ostateczna wersja opublikowana |
| Czas opublikowania: | W momencie opublikowania |
| Data opublikowania w OA: | 21 października 2020 |
| Abstrakty: | angielski |
| This study investigates the frequency–temperature relations between the phase angle φ and admittance Y for composites of cellulose, synthetic ester, and water nanoparticles. We determined the activation energy value for the relaxation time of a phase shift angle ΔWφ ≈ (0.783 ± 0.0744) eV, which was related to the shift of φ(f) waveforms in higher frequency area with increasing temperature. We found that the position of admittance frequency waveforms in double logarithmic coordinates was simultaneously influenced by the temperature dependence of admittance and its relaxation time. Activation energy values for the relaxation time of admittance ΔWτ ≈ (0.796 ± 0.0139) eV and the activation energy value of admittance ∆WY ≈ (0.800 ± 0.0162) eV were determined. It was found that all three activation energy values were identical and their average was ΔW ≈ (0.793 ± 0.0453) eV. Impregnation with synthetic ester resulted in a decrease of activation energy by 0.26 eV compared to the impregnation with insulating oil. This was related to higher dielectric permittivity of the synthetic ester. |
