Title :
Leakage Current Patterns on High Voltage Insulators: Analysis on Frequency and Time-frequency Domains
Author :
Jayasundara, H.I.S. ; Sudarshani, W.P.S. ; Fernando, M.A.R.M.
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Peradeniya, Peradeniya
Abstract :
This paper presents analysis of leakage currents on high voltage insulators in frequency and time-frequency domains. Leakage currents were measured on five silicone rubber insulators under salt fog conditions and recorded over 1000 hours. Different types of leakage current patterns were identified and were grouped according to their levels and the shapes. The patterns were analyzed in frequency and time-frequency domains using fast Fourier transform and short time Fourier transform respectively. It was found that LC groups can be separated among themselves by combined analysis of waveforms in frequency and time-frequency domains.
Keywords :
fast Fourier transforms; leakage currents; silicone rubber insulators; fast Fourier transform; high voltage insulators; leakage current patterns; short time Fourier transform; silicone rubber insulators; time-frequency domains; Current measurement; Fast Fourier transforms; Frequency domain analysis; Insulation; Leakage current; Pattern analysis; Rubber; Shape; Time frequency analysis; Voltage; discharge; insulator; leakage current; time frequency analysis;
Conference_Titel :
Industrial and Information Systems, 2008. ICIIS 2008. IEEE Region 10 and the Third international Conference on
Conference_Location :
Kharagpur
Print_ISBN :
978-1-4244-2806-9
Electronic_ISBN :
978-1-4244-2806-9
DOI :
10.1109/ICIINFS.2008.4798385
