Title :
Wavelet based partial discharge image de-noising
Author_Institution :
ABB Corp. Res., Krakow, Poland
Abstract :
In this paper, the application of wavelet de-noising to partial discharge (PD) phase resolved images obtained during on-line measurements on a 6 kV motor is presented. The basic principles of wavelet de-noising analysis, as well as examples of hard- and soft de-noising thresholding are reported. For the purposes of decomposition, the Daubechies wavelet and wavelet packs at different levels were applied. The efficiency of the enhancement was measured by using a mean square signal-to-noise ratio
Keywords :
partial discharge measurement; 6 kV; Daubechies wavelet; hard de-noising thresholding; mean square signal-to-noise ratio; motor; on-line measurements; partial discharge phase resolved images; soft de-noising thresholding; wavelet de-noising; wavelet packs;
Conference_Titel :
High Voltage Engineering, 1999. Eleventh International Symposium on (Conf. Publ. No. 467)
Conference_Location :
London
Print_ISBN :
0-85296-719-5
DOI :
10.1049/cp:19990876
