Influence of thermal ageing on dielectric response of oil-paper insulation

• Autorzy: Gielniak J. , Graczkowski A. , Gubanski S. , Moranda H. , Mościcka-Grzesiak H. , Walczak K.
• Języki publikacji: EN

Abstrakty

EN

Results of dielectric response measurements in frequency domain at various temperatures have been presented for oil impregnated paper samples unaged and thermally aged containing various amounts of moisture. The obtained results were used for defining respective master curves and activation energies. Discrepancies of the results for similar samples are also discussed. Finally, statistical spread of the data was presented and the influence of moisture content on the dielectric response of paper samples has been discussed.

Słowa kluczowe

EN

dielectric response; oil-paper insulation; thermal ageing; moisture content in oil-paper insulation

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2009
• Tom: Vol. 27, No. 4/2
• Strony: 1199--1205
• Opis fizyczny: Bibliogr. 5 poz.

Twórcy

autor

Gielniak J.

autor

Graczkowski A.

autor

Gubanski S.

autor

Moranda H.

autor

Mościcka-Grzesiak H.

autor

Walczak K.

• Poznan University of Technology Poland

Bibliografia

• [1] GIELNIAK J., MORAŃDA H., NEUMANN S., OSSOWSKI M., PRZYBYŁEK P., WALCZAK K., MOŚCICKA-GRZESIAK H., Conditions of occurrence of bubble effect in a transformer with paper-oil (In Polish), Prep. Sci.-Techn. Conf. Transformers in Operation, Kołobrzeg–Dźwirzyno, 20–22.04.2005, Energetyka, No. 6, 120–122.
• [2] LEWAND L., Understanding water in transformer systems, NETA World Magazine, Spring, 2002.
• [3] SŁOWIKOWSKI J., Moisturing of a transformer. Reasons, effects and present day criteria of assessment, Int. Conf. Power Transformers – Transformer 03, Pieczyska, 18–21.05.2003.
• [4] GUBANSKI S.M., BLENNOW J., KARLSSON L., FESER K., TENBOHLEN S., NEUMANN C., MOSCICKA-GRZESIAK H., FILIPOWSKI A., TATARSKI L., Reliable Diagnostics of Transformer Insulation for Safety Assurence of Power Transmission System. REDIATOOL – a European Research Project, CIGRE Session, Paris 2006.
• [5] GJAERDE A. C., LUNDGAARD L., ILDSTAD E., Effect of temperature and moisture on the dielectric properties of oil-impregnated cellulose, 9th Int. Symp. High Voltage Engineering, Graz 1995.