The application of the cole-cole model for determining parameters of the sabstit ue scheme of paper-oil insulation.

• Autorzy: Wolny, S. , Kędzia, J.
• Konferencja: APTADM 2007, III International Conference on Advances in Processing Testing and Application of Dielectric Materials., September, 26-28, 2007 Wrocław, Poland
• Języki publikacji: EN

Abstrakty

EN

The paper presents simulation results of the influence of parameter a of the Cole-Cole model and relaxation time x on the values of the elements of the series-parallel substitute scheme of paper-oil insulation. RC elements of the substitute model were determined by the application of the lumped approximation of a discrete characteristic operator impedance using'Bode's characteristics in the range from 10 3 Hz to 10 3 Hz. The analysis of the influence of parameters a and x describing the condition of the dielectric under study (e.g. paper-oil insulation) was based on the discussion on depolarization current characteristics obtained through computer simulations. The methodology of determining the substitute scheme of paper-oil insulation, presented in this paper, may be used in diagnostics of power transformers tested by the FDS (Frequency Dielectric Spectroscopy) method, especially in the low frequency domain. Thanks to the application of the computer simulation based on the examination of the current response of the insulation substitute scheme to an individual activation with voltage, it is also possible to obtain depolarization current characteristics used in PDC (Polarization and Depolarization Current) diagnostics.

Słowa kluczowe

EN

Cole-Cole model; paper-oil insulation; frequency dielectric spectroscopy; depolarization current

• Czasopismo: Prace Naukowe Instytutu Podstaw Elektrotechniki i Elektrotechnologii Politechniki Wrocławskiej. Konferencje
• Rocznik: 2007
• Tom: Vol. 46, nr 19
• Strony: 209-212
• Opis fizyczny: Bibliogr. 5 poz.

Twórcy

autor

Wolny, S.

autor

Kędzia, J.

• Opole University of Technology, ul. Proszkowska 76, 45-758 Opole, Poland

Bibliografia

• [1] Malewski R., Praktyka badań eksploatacyjnych, instrukcje I zalecenia IEEE, CIGRE i przedsiębiorstw energetycznych, Transformatory w eksploatacji, Energo-Complex, 2005, pp. 11-22.
• [2] Bolhuis J., Gulski E., Smit J., Monitoring and diagnostic of transformer solid insulation, IEEE Transactions on Power Delivery. Vol. 17, No. 2, April 2002, pp. 528-536.
• [3] Subocz J., Ocena izolacji maszyn WN na podstawie zjawisk relaksacyjnych - pomiary eksploatacyjne. Przegląd Elektrotechniczny - Konferencje, Vol. 3, 1, 2005, pp. 265-268.
• [4] Saha T.K., Review of Time-Domain Polarization Measurements for Assessing Insulation Condition In Aged Transformers, IEEE Transactions on Power Delivery, Vol. 18, No. 4, October 2003, pp. 1293-1301.
• [5] Wolny S., The Influence of Temperature and Dampness on the Value of the Main time Constant of Paper-Oil Insulation Determined by Using Deby's Model, Physics and Chemistry of Solid State. Vol. 7, No. 3, 2006, pp. 572-576.