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Study on the performance of underground XLPE cables in service based on tan delta and capacitance parameters

Ponniran, Asmarashid and Tamsir, Tarmidi (2007) Study on the performance of underground XLPE cables in service based on tan delta and capacitance parameters. In: World Engineering Congress 2007, 5-9 August 2007, Penang, Malaysia.

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Abstract

The performance of underground XLPE cables in service is critical because of ageing mechanisms influences. Many appropriate techniques can be used to evaluate the performance of aged and unaged underground XLPE cables. One of the techniques is based on tan delta and capacitance parameters of the cable insulations. This study focuses on underground XLPE cables which rated at 11 kV and 22 kV for both 1-core and 3-core types. Tan delta and capacitance data of underground XLPE cables are obtained using a Schering bridge instrument. Tan delta and capacitance measurements are performed at ambient temperature (about 26.6oC) and at 50 Hz power frequency. The analysis of data shows that tan delta values increased in proportion to the aging time of the cables. Meanwhile the data analysis of the capacitance values of the cable insulator shows that the values of capacitance inconsistent. From this study, tan delta parameter is more accurate and appropriate parameter for evaluating performance of underground XLPE cables as compared to capacitance parameter. Therefore, the finding of this study shows that aging mechanisms contributes the deteriorations of underground XLPE cable insulations in service and consequently the value of tan delta increases with aging time of the cables.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: tan delta; capacitance; underground XLPE cables; schering bridge
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3001-3521 Distribution or transmission of electric power
Divisions: Faculty of Electrical and Electronic Engineering > Department of Electrical Power Engineering
Depositing User: Normajihan Abd. Rahman
Date Deposited: 26 Feb 2013 03:38
Last Modified: 21 Jan 2015 07:41
URI: http://eprints.uthm.edu.my/id/eprint/3292
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