A study on the use of zinc oxide micro-varistor based field grading materials for composite line insulators


Keskin Arabul F., Arabul A. Y., Cherney E., Jayaram S.

2023 IEEE Electrical Insulation Conference (EIC), Quebec, Kanada, 18 - 21 Haziran 2023, ss.117-120

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.1109/eic55835.2023.10177327
  • Basıldığı Şehir: Quebec
  • Basıldığı Ülke: Kanada
  • Sayfa Sayıları: ss.117-120
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

This paper examines the reduction in the electric field at the line end of a 230 kV composite suspension insulator that can be obtained by applying a field grading material (FGM) to the insulator core at the line end of the insulator. The FGM is based on a highly non-linear conductivity zinc oxide micro-varistor material; and COMSOL® Multiphysics version 5.6 at power frequency AC is used in the analysis. FGM of various nonlinearities and various lengths applied to the core is studied to determine the non-linear characteristics of the FGM and the length of application that provides the greatest reduction in the electric field. The results are compared to the same insulator fitted with a proper design of corona ring and the simulation results show that the corona ring can be eliminated by using the FGM.