DOI: https://doi.org/10.15407/techned2016.04.014

INFLUENCE OF WATER TREES CONDUCTIVITY ON CURRENTS DENSITY AND PRESSURES EMERGING IN POLYETHYLENE INSULATION

Author
M.A. Shcherba*
Institute of Electrodynamics National Academy of Science of Ukraine,
pr. Peremohy, 56, Kyiv-57, 03680, Ukraine,
e-mail: Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript
* ORCID ID : http://orcid.org/0000-0001-6616-4567

Abstract

The analysis of the local amplification of low-frequency electric field (EF) in nonlinear polyethylene (PE) insulation with water trees (WT), which have thickening of spheroids type and cylindrical areas with different conductivity has been made. The influence of specific non-linear electrical conductivity of PE insulation, as well as its amplitude- and frequency-dependent dielectric permittivity on the EF distribution and such multi-physical degradation mechanisms of insulation as tensed volumes, total current density and electromechanical pressures at different trees conductivity has been determined. References 11, figures 2.

Key words: electric field, insulation, nonlinearity, water trees, total current, pressure, degradation.

Received:    03.02.2016
Accepted:    25.03.2016
Published:   21.06.2016

References

1. Landau L.D., Lifshitz Е.М. The Classical Theory of Fields. Vol. II.  Мoskva: Fizmatlit, 2006.  534 p. (Rus)
2. Podoltsev A.D., Kucheriava I.N. Multiphysics modeling in electrical engineering.  Kyiv: Instytut Elektrodynamiky NAN Ukrainy, 2015.  305 p. (Rus)
3. Shcherba A.A., Podoltsev A.D., Kucheriava I.M. Electromagnetic Processes in 330 KV Cable Line With Polyethylene Insulation. Tekhnichna Elektrodynamika.  2013.  No 1.  P. 9–15. (Rus)
4. Shcherba М.А. The features of the local electric field amplifications by conducting inclusions in nonlinear polymer insulation. Tekhnichna Elektrodynamika.  2015.  No 2.  P. 16–23. (Rus)
5. Shcherba М.А., Podoltsev A.D. Electric field and current density distribution near water inclusions of polymer insulation of high-voltage cables in view of its nonlinear properties. Tekhnichna Elektrodynamika.  2016.  No 1.  P. 11–18. (Rus)
6. Boggs S.A. Semi-empirical high-field conduction model for polyethylene and implications thereof. IEEE Trans. on Dielectrics and Electrical Insulation.  1995. Vol. 2.1.  P. 97–106.
7. Champion J.V., Dodd S.J., Stevens G.C. Analysis and modelling of electrical trce growth in synthetic resins. Appl. Phys.  1994.  Vol. 21.  P. 1020–1030.
8. Dissado L.A. Understanding electrical trees in solids: from experiment to theory. IEEE Trans. on DEI.  2002.  Vol. 9.  P. 483–497.
9. Hvidsten S., Ildstad E., Sletbak J. & Faremo H.A.F.H. Understanding water treeing mechanisms in the development of diagnostic test methods. IEEE Trans. on Dielectrics and Electrical Insulation.  1998.  Vol. 5.5.  P. 754–760.
10. Rezinkina, M., Bydianskaya, E., Shcherba, A. Alteration of brain electrical activity by electromagnetic field. Environmentalist.  2007.  Vol. 27.  Nо 4. P. 417–422.
11. Werelius P., Thärning P., Eriksson R., Holmgren B. and Gäfvert U. Dielectric spectroscopy for diagnosis of water tree deterioration in XLPE cables. IEEE Transactions on Dielectrics and Electrical Insulation.  2001.  Vol. 8.1.  P. 27–42.

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