Abstract
In the presented work we examine the effect of a high DC field on the dielectric loss tangent (tanδ) and the relative permittivity (ε′) of Transformerboard, a cellulosic fibrous insulating material. The dielectric dynamics was studied by applying a harmonic voltage signal of different frequencies (50, 500 and 10 000 Hz) onto a high DC bias and by monitoring the time dependent changes of tanδ and ε′. Room-humid and thoroughly dried samples were studied at different temperatures. At all three frequencies we observed significant increases of tanδ and ε′ in room-humid samples right upon the application of a high DC field and their gradual decrease during the DC field stress. This effect was more pronounced at 50 and 500 Hz compared to 10 kHz. The temperature elevation enhanced these processes. After the removal of the DC field both tanδ and ε′ returned to their initial values. In contrast to room-humid Transformerboard, no changes were measured in well-dried samples. The presence of a specific polarization process due to the moderate water content was confirmed for room-humid Transformerboard by means of the low field dielectric spectroscopy.
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References
Kolar, J.W., Huber, J.: Solid-state transformers (SST) concepts, challenges and opportunities. In: ECPE Workshop “Smart Transformers for Traction and Future Grid Application” (2016)
Ortiz, G., Biela, J., Kolar, J.W.: “MegaCube” – 1 MW ultra compact/efficient isolated 20 kHz bidirectional 12 kV/1.2 kV DC/DC converter. In: ECPE Workshop “Power Electronics for Energy Efficiency Buildings, Lighting and Home Appliances” (2010)
Richert, R.: Nonlinear dielectric effects in liquids: a guided tour. J. Phys.: Condens. Matter 29, 363001 (2017)
Moser, H.P.: Transformerboard. Special print of Scientia Electrica (1979)
Einfeldt, J., Meißner, D., Kwasniewski, A.: Polymerdynamics of cellulose and other polysaccharides in solid state-secondary dielectric relaxation processes. Progress Polymer Sci. 26(9), 1419–1472 (2001)
Nakamura, K., Hatakeyama, T., Hatakeyama, H.: Studies on bound water of cellulose by differential scanning calorimetry. Textile Res. J. 51(9), 607–613 (1981)
Birle, M., Bauer, S., Leu, C.: Design and application of a high frequency high voltage generator. In: 17th ISH (2011)
Kaul, G., Plath, R., Kalkner, W.: Development of a computerized loss factor measurement system for different frequencies, including 0.1 Hz and 50/60 Hz. In: 8th ISH (1993)
Kremer, F., Schönhals, A.: Broadband Dielectric Spectroscopy. Springer, Heidelberg (2003)
Tian, F., Ohki, Y.: Electric modulus powerful tool for analyzing dielectric behavior. IEEE Trans. Dielectr. Electr. Insul. 21(3), 929–931 (2014)
Henninger, P.: Dielektrische Untersuchungen an der Papierfaser. Frequenz, Bd. 4, Nr. 7 (1950)
Jafarpour, G., Roig, F., et al.: Influence of water on localized and delocalized molecular mobility of cellulose. J. Non-Cryst. Solids 355, 1669–1672 (2009)
Acknowledgments
The authors thankfully acknowledge WEIDMANN Electrical Technology AG for kindly supplying Transformerboard samples.
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Semenov, I., Leu, C. (2020). Effect of High DC Field on Loss Tangent and Permittivity of Non-impregnated Transformer Board. In: Németh, B. (eds) Proceedings of the 21st International Symposium on High Voltage Engineering. ISH 2019. Lecture Notes in Electrical Engineering, vol 599. Springer, Cham. https://doi.org/10.1007/978-3-030-31680-8_35
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DOI: https://doi.org/10.1007/978-3-030-31680-8_35
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