J. Bodzenta, M. Dzida and T. Pustelny
J. Phys. IV France 137 (2006) 179-184
Decomposition of frequency characteristics of acoustic emission signals for different types of partial discharges sourcesF. Witos1, Z. Gacek2 and P. Paduch1
1 Institute of Physics, Silesian University of Technology, ul. Krzywoustego 2, 44-100 Gliwice, Poland
2 Institute of Power Systems and Control, Silesian University of Technology, ul. Krzywoustego 2, 44-100 Gliwice, Poland
(Published online 23 December 2006)
The problem touched in the article is decomposition of frequency characteristic of AE signals into elementary form of three-parametrical Gauss function. At the first stage, for modelled curves in form of sum of three-parametrical Gauss peaks, accordance of modelled curve and a curve resulting from a solutions obtained using method with dynamic windows, Levenberg-Marquardt algorithm, genetic algorithms and differential evolution algorithm are discussed. It is founded that analyses carried out by means differential evolution algorithm are effective and the computer system served an analysis of AE signal frequency characteristics was constructed. Decomposition of frequency characteristics for selected AE signals coming from modelled PD sources using different ends of the bushing, and real PD sources in generator coil bars are carried out.
© EDP Sciences 2006