access icon free Positive dc corona inception on dielectric-coated stranded conductors in air

In this study, the positive inception voltage of bare and dielectric-coated stranded conductors has been researched by numerical calculations and corona cage experiments. The charge simulation method is used to calculate the potential gradient distribution of the coated stranded conductors. Then, based on the positive inception criterion, the photoionisation inception model considering the effective radiation wavelength is proposed and employed to evaluate the inception voltage of the coated stranded conductors. In addition, in the laboratory, the inception voltage test platform is build up to measure the inception voltage. The results reveal that with the increase of the coating layer thickness, the inception voltage increases. For the same thickness, the inception voltage reduces slightly with the increase of relative permittivity. The calculated values are in good agreement with experimental results of the laboratory corona cage. The conclusion lays a foundation for studying the effect of the coating layer on the corona performance.

Inspec keywords: numerical analysis; electric charge; charge measurement; corona; photoionisation; voltage measurement; conductors (electric); coatings; dielectric devices

Other keywords: inception voltage measurement; inception voltage test platform; dielectric-coated stranded conductors; corona cage experiment; charge simulation method; numerical calculation; positive DC corona inception voltage; photoionisation inception model; potential gradient distribution calculation

Subjects: Other dielectric applications and devices; Charge measurement; Measurement of basic electric and magnetic variables; Gas discharges; Numerical approximation and analysis; Voltage measurement; Other numerical methods; Conductors

References

    1. 1)
    2. 2)
    3. 3)
    4. 4)
    5. 5)
    6. 6)
      • 2. Maruvada, P.S.: ‘Corona performance of high voltage transmission lines’ (Taylor & Francis Group Press, 2000, 1st edn.).
    7. 7)
      • 8. Meek, J. : ‘The mechanism of spark discharge in air at atmospheric pressure’, Phys. Rev., 1940, 11, (48), pp. 772774.
    8. 8)
    9. 9)
    10. 10)
    11. 11)
      • 1. Abdel-Salam, M.: ‘High voltage engineering-theory and practice’ (Marcel Dekker Press, 2000, 1st edn.).
    12. 12)
      • 15. Kulikovsky, A.: ‘Positive streamer in a weak field in air: a moving avalanche-to-streamer transition’, Phys. Rev., 1998, 57, (6), pp. 70667071.
    13. 13)
    14. 14)
    15. 15)
      • 6. Peek, F.W.: ‘Dielectric phenomena in HV engineering’ (McGraw-Hill Press, 1929, 1st edn.).
    16. 16)
    17. 17)
    18. 18)
    19. 19)
    20. 20)
    21. 21)
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