By Topic

Dielectric spectroscopy characteristics of aged transformer oils

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Neimanis, R. ; Programma Electr. AB, GE Energy Services, Taby, Sweden ; Arvidsson, L. ; Werelius, P.

Frequency domain dielectric spectroscopy, measurements of capacitance and dissipation factor/power factor in a wide frequency range becomes increasingly popular in assessment of power transformer insulation systems. The interpretation of the measurement results is mostly made using a simple model taking the relative amount of oil and impregnated cellulose paper into account. This paper presents main findings from frequency domain dielectric spectroscopy measurements on transformer oil samples from different power transformers still in service. The interpretation model using oil permittivity of 2.2 combined with its conductivity is compared with actual measurements in the frequency range of 1000 Hz down to 0.01, sometimes down to 0.001 Hz. The temperature dependence and possible voltage dependence, especially at lower frequencies, are also investigated.

Published in:

Electrical Insulation Conference and Electrical Manufacturing & Coil Winding Technology Conference, 2003. Proceedings

Date of Conference:

23-25 Sept. 2003