Title :
Wavelet denoising of partial discharge images
Author :
Florkowski, Marek
Author_Institution :
ABB Corp. Res., Krakow, Poland
Abstract :
This paper presents application of wavelet based de-noising to partial discharge (PD) phase resolved images. Simulations are discussed in first part while in the second one results obtained during on-line measurements on a 6 kV motor. 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 Deabuchies wavelet and wavelet packets at different levels were applied. The efficiency of the enhancement was measured by using a mean square signal-to-noise ratio and standard deviation to mean ratio
Keywords :
image restoration; partial discharge measurement; wavelet transforms; 6 kV; computer simulation; motor; on-line measurement; partial discharge; phase resolved image; signal-to-noise ratio; wavelet denoising; Continuous wavelet transforms; Discrete wavelet transforms; Fourier transforms; Noise reduction; Partial discharges; Signal analysis; Signal to noise ratio; Wavelet analysis; Wavelet packets; Wavelet transforms;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2000. Proceedings of the 6th International Conference on
Conference_Location :
Xi´an
Print_ISBN :
0-7803-5459-1
DOI :
10.1109/ICPADM.2000.875729
