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Proceedings Paper

Discharge light and carbonization distribution characteristics at XLPE-silicon rubber interface with silicon-grease in tracking failure test
Author(s): Liang Gu; W. Liu; S. L. Lei; S. B. Wang; Y. Y. Deng
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Paper Abstract

Imaging processing method was adopted to investigate the effect of silicon grease on tracking failure of the XLPEsilicon rubber interface by analyzing the distribution characteristics of discharge light and carbonization at the interface. Three interfaces were set up by pressing together a slice of XLPE and a slice of transparent silicon rubber. One filled silicon grease and the other partly filled the grease. As comparison, the third one filled on grease. High voltage (AC 50 Hz) was applied on a pair of flat-round electrodes sandwiched at the interface with their insulation distance of 5 mm. When the test voltage was raised to a certain value, discharge occurred and discharge light appeared and carbonization accumulated at the interface. The discharge light from discharge to the failure and the carbonization after the failure was recorded with a digital video recorder and then the images were analyzed with image processing method. Obtained results show that silicon grease at the interface weakens the transportation of charge and enhances the interfacial breakdown strength. However, interfacial discharge and tracking failure easily occur once discharge appears. Image processing method is helpful to understand the tracking failure process and mechanism of XLPE cable joint.

Paper Details

Date Published: 8 July 2011
PDF: 6 pages
Proc. SPIE 8009, Third International Conference on Digital Image Processing (ICDIP 2011), 80091V (8 July 2011); doi: 10.1117/12.896673
Show Author Affiliations
Liang Gu, Chongqing Univ. of Technology (China)
W. Liu, Chongqing Univ. of Technology (China)
S. L. Lei, Chongqing Univ. of Technology (China)
S. B. Wang, Chongqing Univ. of Technology (China)
Y. Y. Deng, Chongqing Univ. of Technology (China)

Published in SPIE Proceedings Vol. 8009:
Third International Conference on Digital Image Processing (ICDIP 2011)
Ting Zhang, Editor(s)

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