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

fYear

2008

fDate

8-10 Dec. 2008

Firstpage

1

Lastpage

6

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICIINFS.2008.4798385

Filename

4798385