Title :
Time-frequency analysis of E-M signals emitted from a partial discharge occurring in GIS using wavelet transform
Author :
Kawada, Masatake ; Kawasaki, Zen-Ichiro ; Matsu, Kotaro
Author_Institution :
Dept. of Electr. Eng., Osaka Univ., Japan
Abstract :
Diagnostic techniques have been investigated to detect a partial discharge (PD) associated with a dielectric material defect in a high-voltage electrical apparatus such as gas insulated switchgear (GIS). We propose a new method to detect the wide-band electromagnetic (E-M) waves emitted from PD using the wavelet transform The wavelet transform can provide a “dynamic spectrum” in the time-frequency domain. This paper experimentally shows the “dynamic spectrum” of the wide-band EM waves emitted from PD. This method is shown to be useful for detecting PD occurring in GIS
Keywords :
electromagnetic waves; gas insulated switchgear; insulation testing; partial discharges; time-frequency analysis; wavelet transforms; E-M signals; GIS; diagnostic techniques; dielectric material defect; dynamic spectrum; gas insulated switchgear; high-voltage electrical apparatus; partial discharge; time-frequency analysis; time-frequency domain; wavelet transform; wide-band EM waves; wide-band electromagnetic waves; Dielectric materials; Electromagnetic scattering; Gas insulation; Geographic Information Systems; Partial discharges; Switchgear; Time frequency analysis; Wavelet domain; Wavelet transforms; Wideband;
Conference_Titel :
Electrical Insulation, 1998. Conference Record of the 1998 IEEE International Symposium on
Conference_Location :
Arlington, VA
Print_ISBN :
0-7803-4927-X
DOI :
10.1109/ELINSL.1998.704647
