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http://dx.doi.org/10.5762/KAIS.2020.21.5.516

Mathematical Modeling and Analysis for Water_Tree of Underground Cables  

Lee, Jung-Woo (Department of Electrical Engineering, Korea University of Technology and Education)
Oh, Yong-Taek (Department of Electrical Engineering, Korea University of Technology and Education)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.21, no.5, 2020 , pp. 516-522 More about this Journal
Abstract
Water trees can cause considerable damage to the performance of underground cables. Theymay formwithin the dielectric used in buried or water-immersed high voltage cables. They grow in a bush-like or tree-like form, often taking decades before causing damage to a cable's performance. They are usually found on very old underground cables, often in an inaccessible place. It is costly and time-consuming to detect watertrees in underground cables. Tree detection technology, including mathematical modeling,can reduce the maintenance cost and time necessary for detecting these trees.To simulate detection of water trees in this study, a mathematical model ofan XLPE cable and a water tree were developed. The complex water tree structure was simplified, based on two identified patterns of aventedtree. A Matlab simulation was performed to calculate and analyze the capacitance and resistance of a cable insulation layer,based on growth of a watertree. Capacitance size increased about 0.025×10-13[Farads/mm] compared to normal when the tree area of the cable was advanced to 95% of the insulation layer. The resistance value decreased by about 0.5×1016[ohm/m]. These changesand changesshowninaBurkes paper physical modeling simulation are similar.The value of mathematical modeling for detecting water trees and damage to underground cables has been demonstrated.
Keywords
Water-tree; Vanted-tree; Matlab; Underground Cable; XLPE;
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  • Reference
1 HS. Yoon, "A Study on the Water Tree Argeing Analysis of Undergrounding Cable and Application of New Method to Efficiency Restoration", Master's thesis, Seoul National University of Science & Technology, Seoul, Korea, pp.1, 2000.
2 YH. Beak, "Rational Direction of Cable Underground Project", Technical Report, Korea Industrial Development Institute, Korea, pp.1-3.
3 Korea Electric Power Corporation, "Analysis and Countermeasures of the Fault on Underground Distribution Line", 1999
4 Hwang, B.K. (1990) A New Water Tree Retardant XLPE. IEEE Transactions on Power Delivery, 5, 1617-1627. DOI: http://dx.doi.org/10.1109/61.58008   DOI
5 L. Bayan, "Water Tree in XLPE Cable," Penang, Malaysia, Dec. 28, 2009.
6 Z. Wang, P. Marcolongo, J. A. Lemberg, B. Panganiban, J. W. Evans, R. O. Ritchie, P. K. Wright, "Mechanical fatigue as a mechanism of water tree propagation in TRXLPE," IEEE Transactions on Dielectrics and Electrical Insulation, vol.19, no.1, pp.321-330, February 2012.   DOI
7 M. Y. Chen, "A nonlinear frequency analysis based approach for power cable insulation fault detection", COMPEL, vol. 31, no. 2, pp. 369-386, 2012.   DOI
8 K. W. Burkes, E. Makram, and R. Hadidi, Proceedings of the 2016 COMSOL Conference in Boston, 2016.
9 Catalog of PRYSMIAN, "5-35kV 1/C TRXLE MV-90 POWER (Tape Shield), Medium Voltage Commercial & Industrial Cables", B111 2013-07-10 (2013)
10 M. Alsharif, P. A. Wallace, D. M. Hepburn, and C. Zhou, Proceedings of the 2012 COMSOL Conference in Milan, 2012.
11 Q. Chen, "Capacitance of Water Tree Modeling in Underground Cables", Journal of Power and Energy Engineering, 2014, 2, 9-18 DOI: http://dx.doi.org/10.4236/jpee.2014.211002   DOI
12 K. W. Burkes, "Modeling the Effect of a Water Tree Inside a Tape Shield and Concentric Neutral Cables", Excerpt from the Proceedings of the 2014 COMSOL Conference in Boston, 2014.
13 S. Mohammadi, R. K. Far, "Failures detection in high voltage line by image processing," World Academy of Science, Engineering and Technology 2012, pp. 2055-2057, 2012.