| Numéro |
J. Phys. IV France
Volume 129, October 2005
|
|
|---|---|---|
| Page(s) | 89 - 92 | |
| DOI | https://doi.org/10.1051/jp4:2005129019 | |
J. Phys. IV France 129 (2005) 89-92
DOI: 10.1051/jp4:2005129019
The influence of the temperature of insulation oil on the results of measurements of the acoustic emission signals generated by partial discharges
T. Boczar and S. BoruckiTechnical University of Opole, Faculty of Electrical Engineering and Automatics, Institute of Electric Power Engineering, ul. Sosnkowskiego 31, 45-272 Opole, Poland
Abstract
The subject matter of this paper refers to the
improvement of the acoustic emission method (AE) used for evaluation of
partial discharges (PDs) generated in paper-oil insulation systems of power
appliances. The paper presents the measurement and analysis results of the
AE signals generated by partial discharges of the surface type (SPDs). The
AE signals were measured on the surface of a transformer tub using a
broad-band contact transducer, and then they were subject to a
time-frequency analysis. The measurements were taken while heating
transformer oil in the range from 30 to 85
C with gradation of every
5C. For time runs, amplitude and energy density spectra the descriptor
values that characterize them were calculated and then their comparative
analysis was carried out to determine the influence of the insulation oil
temperature changes on the measurement results of the AE signals generated
by PDs.
© EDP Sciences 2005