Comparison of Eight Month Coastal Polluted Porcelain and Epoxy Resin Outdoor Insulators
DOI:
https://doi.org/10.5614/itbj.eng.sci.2008.40.2.4Abstract
This study presents the experimental results of eight months naturally coastal polluted outdoor porcelain and epoxy resin insulators. The experiments were leakage current and applied high voltage measurements used a two-channel storage digital oscilloscope, in the hermetically sealed chamber, where temperature, humidity , pressure and applied voltage could be adjusted and measured simultaneously. The leakage current waveforms were analyzed using FFT and the relation to environmental parameters were analyzed using correlation matrix of multivariate statistical tools. It was also conducted SEM and EDAX tests. Base on the correlation coefficient matrix, the humidity contributed to leakage current amplitude and phase angle on the porcelain insulator were very significant, with the correlation coefficient were 0.60 and -0.68 respectively. Whereas, on polluted epoxy resin insulator, the humidity did not influence to leakage current and phase angle considerably. Generally, the surface became rougher than the new one. The most three chemical elements in pollutants were chlorine, silicon and ferrum.
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References
Fernando, M.M.A.R., Performance for Non-ceramic Insulators in Tropical Environments, PhD Dissertation, Department of Electric Power Engineering, Chalmers University of Technology, Goteborg-Sweden, pp.1-2, 1999.
Vosloo, W.L., A Comparison of the Performance of High-Voltage Insulator Materials in a Severely Polluted Coastal Environment, PhD Dissertation, Department of Electrical and Electronic Engineering, University of Stellenbosch, South Africa, March, pp.9-10, 2002.
Gorur, R.S., Cherney, E.A., Burnham, J.T., Outdoor Insulators Ravi S. Gorur, Inc., Phoenix, Arizona, USA, pp.37, 145, 1999.
Vosloo, W.L., Macey, R.E., Toureil, C. de, The Practical Guide to Outdoor High Voltage Insulators, Crown Publications CC., Johannesburg, South Africa, pp.36-37, 67, 2004.
Suwarno, Leakage Current Waveforms of Outdoor Polymeric Insulators and Possibility of Application for Diagnostics of Insulator Conditions, Journal of Electrical Engineering & Technology, The Korean Instit ute of Electrical Engineering, 1(1), pp.114-119, 2006.
OriginLab Co., Origin V75 User's Manual, OriginLab Corporation, MA,USA, pp.601-611, 2003.
Anderson, T.W., An Introduction to Multivariate Statistical Analysis, Second Edition, John Wiley & Sons, pp.18,489, 1984.
Whittaker, J., Graphical Models in Applied Multivariate Statistics, John Wiley & Sons, pp.17,48-51, 1996.
Liu, H., Cash, G., Birthwhistle, D., George, G., Characterization of a Severely Degraded Silicone Elastomer HV Insulator -an Aid to Development of Lifetime Assessment Techniques, IEEE Transactions on Dielectrics and Electrical Insulation, Vol.12, No.3, pp.481, 485, June 2005.
