Is the Dry-Band Characteristic a Function of Pollution and Insulator Design?

Maurizio Albano, A. Manu Haddad and Nathan Bungay
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Maurizio Albano: School of Engineering, Cardiff University, The Parade, Cardiff CF24 3AA, UK
A. Manu Haddad: School of Engineering, Cardiff University, The Parade, Cardiff CF24 3AA, UK
Nathan Bungay: School of Engineering, Cardiff University, The Parade, Cardiff CF24 3AA, UK

Energies, 2019, vol. 12, issue 19, 1-15

Abstract: This paper assesses the dry-band formation and location during artificial pollution tests performed on a 4-shed 11kV insulator with conventional and textured surface designs in a clean-fog chamber and with the application of a voltage ramp-shape source. The different designs present the same overall geometrical dimensions, but the textured ones are characterized by the application of a patented insulator surface design. Three pollution levels, extremely high, high and moderate, were considered. A newly developed MATLAB procedure is able to automatically recognize the perimeter of the insulator, the trunk and shed areas on infra-red recordings. In addition, using the vertical axis identification, all trunks are subdivided into zones and into left and right areas, significantly increasing the capability of abnormalities detection. Any temperature increase within these areas enables to detect the appearance and the extension of dry bands. The results of the analysis of the statistical location and extension development over time of the dry bands during these set of comparative tests show a clear distinction between designs and pollution levels. These results may offer interesting design guidelines for dry-band control.

Keywords: insulator design; dry band; pollution (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
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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