Identification of Normally Operating High-Voltage Cables beyond Expected Life time

Title & Authors
Identification of Normally Operating High-Voltage Cables beyond Expected Life time
Um, Kee-Hong; Lee, Kwan-Woo;

Abstract
Continuous, high-quality supply of electrical energy is the backbone of any modern economy. Any equipment operating at a power station must be reliable and safe. All major power supply components such as transformers, cables, generators, and switchgear need to be kept in perfect operating condition. The lifetime of power cables, used as the main means of transferring electric power, is understood to be about 30 years, from the time of manufacturing. The dielectrics between two conductors of a cable must be able to withstand electrical stresses from high-voltage input. This condition should be verified throughout the lifetime of the cable system. Several techniques, such as VLF-tan$\small{{\delta}}$, partial discharge, and insulation resistance are used in order to determine the operating conditions of cables. In this paper, we present our work on insulation resistance to diagnose cables in operation at the Western Power station in Taean, Chungcheong Namdo Province, South Korea. As a result we have found cables the life time of which is 38 years.
Keywords
XLPE;VLF tan$\small{{\delta}}$;Water tree;Parasitic resistance;Partial discharge;
Language
Korean
Cited by
References
1.
J. S. Kim, K. H. Kim, J. S. Lee, "The Study on the Variable Orifice Spray of the Steam Power Plant Desuperheater," Journal of the Korea Academia-Industrial Cooperation Society(JKAIS), Vol. 14, No. 1, pp. 63-68, 2013.

2.
K. H. Um, K. W. Lee, "Nonchange of Grounding Current due to Equipment Measuring Insulation Resistance", Journal of the The Institute of Internet, Broadcasting and Communication, vol. 15, no. 3, Jun 2015.

3.
S. Hvidsten, J. T. Benjaminsen, "Diagnostic testing of MV XLPE cables with low density of water trees" Electrical Insulation, 2002. Conference Record of the 2002. IEEE International Symposium on, 7-10 Apr 2002, pp. 108 - 111, Boston, MA, 10.1109/ELINSL, 2002, 995892.

4.
A. N. Luiten, Topics in Applied Physics (Book 79), Springer Frequency Measurement and Control: Advanced Techniques and Future Trends (Topics in Applied Physics), p.45-49. Paperback-Sep 12, 2014.

5.
J. B. Lee, Y. H. Jung, "An Amendment of the VLF $tan{\delta}$ Criteria to Improve the Diagnostic Accuracy of the XLPE-insulated Power Cables, " Trans. KIEE. Vol. 59, No. 9, Sep 2010.

6.
N. Davies, D. Jones, "Testing Distribution Switchgear for Partial Discharge in the Laboratory and the Field," Electrical Insulation, 2008. ISEI 2008. Conference Record of the 2008 IEEE International Symposium on, June 9-12 2008 Vancouver, BC, DOI:10.1109/ELINSL.2008.4570430.

7.
http://www.pat-testing-course.com/blog/faqs/insulation-resistance-test.

8.
IEEE-Std-43-2000, "IEEE Recommended Practice for Testing Insulation Resistance of Rotating Machinery", IEEE Power & Energy Society, p. 18, Mar 2000.

9.
K. H. Um, K. W. Lee, "Developing Equipment to Detect the Deterioration Status of 6.6kV Power Cables in Operation at Power Station", Journal of the The Institute of Internet, Broadcasting and Communication, vol. 14, no. 4, pp. 197-203, Jun 2013.

10.
K. W. Lee, Y. H. Hwang, S. H. Lee, K. H. Um, "A study on the Relationship between Load Current and Temperature of 6.6 kV Cable Systems in Operation", 2015 Summer Conference KIEE. 2015. July 15 - 17, 2015. Moojoo, Chunbook.