Constellation of Condensation and Raindrops and Its Effect on the DC Flashover Voltage of Inclined Silicone Insulation

Rabah Boudissa, Fatma Bouchelga, Stefan Kornhuber and Klaus Dieter Haim
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Rabah Boudissa: Laboratory of Electrical Engineering, Department of Electrical Engineering, University A. Mira of Bejaia, Bejaia 06000, Algeria
Fatma Bouchelga: Laboratory of Electrical Engineering, Department of Electrical Engineering, University A. Mira of Bejaia, Bejaia 06000, Algeria
Stefan Kornhuber: Faculty of Electrical Engineering and Computer Science, University of Applied Sciences, Theodor-Koerner-Allee 16, 8800 Zittau, Germany
Klaus Dieter Haim: Faculty of Electrical Engineering and Computer Science, University of Applied Sciences, Theodor-Koerner-Allee 16, 8800 Zittau, Germany

Energies, 2019, vol. 12, issue 18, 1-17

Abstract: The purpose of this paper is to characterize the arrangement of raindrops and natural condensation and its effect on the direct current voltage’s flashover of a hydrophobic silicone insulating surface under variable inclination. Two devices have been realized, one for on-site exposure of insulation samples under rain and condensation, and the other for laboratory use in order to allow the variation of the angle of their inclination. The temporal evolution of the constellation of raindrops and natural condensation as well as the electrical discharge produced in the laboratory was visualized. The results emanated from the on-site investigation allowed the identification of the most reproducible type of arrangement of rainwater and natural condensation drops as well as the estimation of their respective volume. The results from the laboratory clearly show the existence of an interval of the insulation’s inclination angle, which allows the best approximation of its electrical performance to what was obtained in the absence of these drops. Moreover, these same results also inform us about some very critical situations to avoid regarding the insulation by a judicious choice of its inclination angle.

Keywords: SiR; rain and natural condensation; angle of inclination; zigzag arrangement; electrical surface discharge; dc flashover (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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