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

Author

Listed:
  • Jordi-Roger Riba

    (Electrical Engineering Department, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain)

  • Santiago Bogarra

    (Electrical Engineering Department, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain)

  • Álvaro Gómez-Pau

    (Electronics Engineering Department, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain)

  • Manuel Moreno-Eguilaz

    (Electronics Engineering Department, Universitat Politècnica de Catalunya, 08222 Terrassa, Spain)

Abstract

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.

Suggested Citation

  • Jordi-Roger Riba & Santiago Bogarra & Álvaro Gómez-Pau & Manuel Moreno-Eguilaz, 2020. "Experimental Study of the Corona Performance of Aged Sand-Cast Substation Connectors," Energies, MDPI, vol. 13(11), pages 1-13, June.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:11:p:2785-:d:365767
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    References listed on IDEAS

    as
    1. Francesca Capelli & Jordi-Roger Riba & Joan Pérez, 2016. "Three-Dimensional Finite-Element Analysis of the Short-Time and Peak Withstand Current Tests in Substation Connectors," Energies, MDPI, vol. 9(6), pages 1-16, May.
    2. Disheng Wang & Lin Du & Chenguo Yao, 2019. "Statistical Study on Space Charge effects and Stage Characteristics of Needle-Plate Corona Discharge under DC Voltage," Energies, MDPI, vol. 12(14), pages 1-17, July.
    3. Jordi-Roger Riba & William Larzelere & Johannes Rickmann, 2018. "Voltage Correction Factors for Air-Insulated Transmission Lines Operating in High-Altitude Regions to Limit Corona Activity: A Review," Energies, MDPI, vol. 11(7), pages 1-14, July.
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