DC performance of non-uniformly transversal polluted glass insulation under parallel electrical discharges’ effect
| Autor: | Rabah Boudissa, Fatma Bouchelga, Stefan Kornhuber, Klaus Dieter Haim |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
020209 energy Applied Mathematics Limit value 020208 electrical & electronic engineering Phase (waves) 02 engineering and technology Arc (geometry) Electric arc Dc voltage Electrical resistance and conductance Transversal (combinatorics) 0202 electrical engineering electronic engineering information engineering Arc flash Electrical and Electronic Engineering Composite material |
| Zdroj: | Electrical Engineering. 102:2453-2463 |
| ISSN: | 1432-0487 0948-7921 |
| DOI: | 10.1007/s00202-020-01042-2 |
| Popis: | The aim of this paper is to quantify the evolution’s effect of parallel electrical discharges on the performance of a plane insulation placed simultaneously under conditions of a non-uniform transversal distribution of pollution and positive DC voltage. The results emanating from this experimental study revealed a maximum increase about 18% of flashover voltage of insulation’s non-uniform transversal distribution of the insulation compared to that obtained under uniform pollution distribution. The existence of a limit value of the electrical conductivities’ ratio of the lightly and the heavily contaminated bands, characterized by an early development of the electrical flashover arc of the insulation in the heavily polluted band, was demonstrated in this investigation. Also, a direct link has been established between the flashover frequency of the insulation’s highly contaminated band, under the effect of a non-uniform transversal distribution of pollution and its electrical resistance. Similarly, an approximation linking the insulation’s length to the effective width of an electrical arc in its last phase of development and consequently the number of electrical arcs that can develop in the two differently polluted bands just before the insulation’s flashover was done in this study. |
| Databáze: | OpenAIRE |
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