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DOI: https://doi.org/10.15407/techned2018.01.017


DEFECTS OF CONDUCTOR SCREEN AND THEIR INFLUENCE ON ELECTRIC FIELD DISTRIBUTION IN POLYETHYLENE INSULATION OF POWER CABLE

Journal Tekhnichna elektrodynamika
Publisher Institute of Electrodynamics National Academy of Science of Ukraine
ISSN 1607-7970 (print), 2218-1903 (online)
Issue No 1, 2018 (January/February)
Pages 17 – 22

 

Author
Kucheriava I.M.
Institute of Electrodynamics National Academy of Sciences of Ukraine,
pr. Peremohy, 56, Kyiv, 03057, Ukraine,
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Abstract

The electric field distributions in the cross-linked polyethylene (XLPE) insulation of power cable with defects in the conductor screen at macro- and microlevels are studied using multiscale modeling. The surface roughness, protrusion of the screen into the insulation and bridging channel in the conductor screen as macro-sized defects as well as the porous structure of the screen as micro-sized defect are modeled and examined. The electric problem for macrodefects is coupled with the problem for microdefects solved in the appropriate region of the screen. The considerable electric field enhancement near the defects is revealed by numerical simulation. From such view point, the degradation of the insulation in its local regions with the potential formation and growth of water trees is explained. References 11, figures 5.

 

Key words: XLPE insulated power cable, conductor screen, manufacturing and operational defects, porous structure, three-dimensional models, multiscale modeling.

 

Received:     19.06.2017
Accepted:     22.06.2017
Published:   29.01.2018

 

References

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2. Kucheriava I.M. Application of multiscale modeling for study of electric field in insulation of 330 kV power cable at emergency operation. Tekhnichna Elektrodynamika. 2012. No 4. Pp. 13–18. (Rus)
3. Podoltsev O.D., Kucheriava I.M. Multiscale modeling in electrical engineering. Kiev: Institut Elektrodinamiki Natsionalnoi Akademii Nauk Ukrainy, 2011. 256 p. (Rus)
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11. Kucheriava I.M. Power cable defects and their influence on electric field distribution in polyethylene insulation. Tekhnichna Elektrodynamika. 2017. № 2. Pp. 19–24.