Evaluation of the accuracy of determining the moisture content of the cellulose component of transformer insulation using the Frequency Domain Spectroscopy method
Fragment książki (Rozdział monografii pokonferencyjnej)
MNiSW
20
Poziom I
| Status: | |
| Autorzy: | Kierczyński Konrad, Molenda Paweł, Cichoń Andrzej, Żukowski Paweł |
| Dyscypliny: | |
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| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Strony: | 134 - 138 |
| Efekt badań statutowych | NIE |
| Finansowanie: | The research was supported from the state budget within the programme of the Ministry of Education and Science entitled 'Science for Society II' project no. NdS-II/SP/0173/2024/01 total project value PLN 1,462,590.80 as well as partly from a subsidy from the Ministry of Science and Higher Education for the Lublin University of Technology as funds allocated for activities in the scientific disciplines of Automation, Electronics, Electrical Engineering and Space Technologies (grants: FD-20/EE-2/702). |
| Materiał konferencyjny: | TAK |
| Nazwa konferencji: | 26th International Scientific Conference on Electric Power Engineering - EPE 2026 |
| Skrócona nazwa konferencji: | 26th EPE 2026 |
| URL serii konferencji: | LINK |
| Termin konferencji: | 18 maja 2026 do 20 maja 2026 |
| Miasto konferencji: | Opole |
| Państwo konferencji: | POLSKA |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| In this study, alternating current electrical parameters of six power transformers with rated voltages not lower than 110 kV were measured using a DIRANA PDC–FDS analyzer. For these transformers, the XY parameters according to CIGRE were known. Using the DIRANA software, the moisture content in the solid insulation component was determined by applying the actual X and Y values (Method I) as well as without providing these values (Method II). In the case of a transformer with an operating time of 29 years, the moisture content obtained using Method I was 0.3%. Such a low moisture content after a long period of service is rather unlikely. The application of Method II resulted in a moisture content of 2%. For the remaining transformers, the moisture content estimated using Method I was from 2 to 2.5 times higher than that obtained using Method II. A comparison was performed between the XS and YS values determined by the software (Method II) and the actual values. It was found that, in Method II, the DIRANA software significantly overestimates the pressboard volume for all investigated transformers, by approximately 1.4 up to even about 2.4 times compared to the actual volume. Consequently, it overestimates the influence of the alternating current parameters of the pressboard on the results of moisture content estimation in the cellulose component. At the same time, the influence of the insulating oil parameters is reduced. This indicates that the alternating current parameters of the insulating oil differ from those assumed in the software. The observed differences between the actual and software-assumed alternating current parameters of the insulating oil indicate that the estimation of moisture content, both with and without consideration of the XY parameters, yields results that deviate from the actual moisture levels in the solid insulation of power transformers. |
