| Title |
The Analysis of Partial Discharges Pattern using Discrete Wavelet Transform |
| Authors |
Hyun-Dong Lee ; Kwang-Sik Lee ; Dong-In Lee |
| Abstract |
This paper deals with multiresolution analysis of wavelet transform for partial discharge(PD), composite discharge(corona + surface discharge). Multiresolution analysis was used for performing discrete wavelet transform. PD signals was decomposed into "approximation" and "detail" components until 4 levels by using discrete wavelet analysis. In this paper, daubechies family is adopted for the research of the characteristics of PD signals. The results show that in corona discharge the segment 7, 8, 9, 10, 11 values of defined variable is increased with discharge process, so phase distribution is characterized by 210～330 ranges. In case surface discharge in expoxy insulator inserted, defined variable values is fairly symmetric discharge pattern because coupled both corona and dielectric bounded discharges. We can confirmly discriminate the type of PD source. |