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Experimental Study of the Corona Performance of Aged Sand-Cast Substation Connectors

1
Electrical Engineering Department, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain
2
Electronics Engineering Department, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain
*
Author to whom correspondence should be addressed.
Energies 2020, 13(11), 2785; https://doi.org/10.3390/en13112785
Received: 7 May 2020 / Revised: 20 May 2020 / Accepted: 21 May 2020 / Published: 1 June 2020
Substation connectors, like many other high-voltage products, are tested once manufactured. However, the corona behavior of aged specimens can differ from that exhibited by newer ones, thus generating detrimental technical and environmental effects. Manufacturers need to know the long-term corona behavior of substation connectors to offer their customers maximum safety and transparency about such critical products. This paper analyzes the ageing effect on the surface roughness and the visual corona extinction voltage of sand-cast aluminum connectors, which were artificially aged in a salt spray chamber for different periods. The experimental results show an important variability of the surface roughness and corona extinction voltage (CEV) among connectors with the same ageing level due to the sand-casting manufacturing process. The results in this paper also show a slight increase in the surface roughness with the ageing period, although there is not a clear pattern between the applied ageing level and the experimental CEV value. It is concluded that the inherent variability among connectors due to the sand-cast process has more influence than the ageing effect itself. View Full-Text
Keywords: corona effect; ageing; substation connectors; high-voltage; sand casting corona effect; ageing; substation connectors; high-voltage; sand casting
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MDPI and ACS Style

Riba, J.-R.; Bogarra, S.; Gómez-Pau, Á.; Moreno-Eguilaz, M. Experimental Study of the Corona Performance of Aged Sand-Cast Substation Connectors. Energies 2020, 13, 2785. https://doi.org/10.3390/en13112785

AMA Style

Riba J-R, Bogarra S, Gómez-Pau Á, Moreno-Eguilaz M. Experimental Study of the Corona Performance of Aged Sand-Cast Substation Connectors. Energies. 2020; 13(11):2785. https://doi.org/10.3390/en13112785

Chicago/Turabian Style

Riba, Jordi-Roger, Santiago Bogarra, Álvaro Gómez-Pau, and Manuel Moreno-Eguilaz. 2020. "Experimental Study of the Corona Performance of Aged Sand-Cast Substation Connectors" Energies 13, no. 11: 2785. https://doi.org/10.3390/en13112785

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