A study on the use of zinc oxide micro-varistor based field grading materials for composite line insulators
2023 IEEE Electrical Insulation Conference (EIC), Quebec, Kanada, 18 - 21 Haziran 2023, ss.117-120, (Tam Metin Bildiri)
- 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.