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Technical Journal, Vol. 18 No. 3, 2024.

Original scientific paper

https://doi.org/10.31803/tg-20230710223321

Analytical Description of the Electric Field inside a High Voltage Glass Insulator

Tomislav Barić orcid id orcid.org/0000-0002-7852-3800 ; Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, University of Osijek, Kneza Trpimira 2B, 31000 Osijek, Croatia
Hrvoje Glavaš orcid id orcid.org/0000-0002-3658-0364 ; Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, University of Osijek, Kneza Trpimira 2B, 31000 Osijek, Croatia
Željko Hederić ; Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, University of Osijek, Kneza Trpimira 2B, 31000 Osijek, Croatia
Mirko Karakašić ; University of Slavonski Brod, Mechanical Engineering Faculty in Slavonski Brod, Trg Ivane Brlić-Mažuranić 2, 35000 Slavonski Brod, Croatia *

* Corresponding author.

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Abstract

Research presented in this paper analyzes the accuracy and applicability of analytical expressions to describe the electric field of a high-voltage glass insulator. The metal cap and the metal pin of the glass insulator are represented by coaxial cylindrical electrodes. The insulating materials between them are modeled as coaxial hollow cylinders. Analytical expressions for the electric field in these insulating materials are derived. Using these expressions, the spatial distribution of the electric field in the insulating materials was determined. Suitable software, based on the finite element method (FEM), was used to determine the spatial distribution of the electric field in dielectrics in the same space. Both analyses were performed under quasi-static conditions, and the results of the analytical expressions were compared with the FEM results. Discrepancies between the results of the two mentioned analyses were observed. The reasons for the observed discrepancies and the applicability of the presented analytical expressions are commented on.

Keywords

analytical description; electric field; finite element method (FEM); glass insulator; high voltage; numerical calculation

Hrčak ID:

319174

URI

https://hrcak.srce.hr/319174

Publication date:

5.9.2024.

Visits: 393 *