Electric field analysis of the 230 kV AC transmission line system for a limited area

Name: P. Kranoongon

Organization : Chulalongkorn University. Faculty of Engineering

Email : parkpoom.pond@gmail.com

Name: B. Techaumnat

Organization : Chulalongkorn University. Faculty of Engineering

Email : boonchai.t@chula.ac.th

keyword: High voltage engineering

LCSH: Electric fields

; Electric power transmission

LCSH: Telecommunication lines

; Electromagnetic field analysis

LCSH: Finite element method

Abstract: In recent years, composite cross-arms have been used in transmission line systems. Electric field analysis at the composite cross-arm is very important for high-voltage systems. The electric field at corona rings and grading rings must be verified to ensure it does not exceed the corona threshold field. However, the geometry of the cross-arm is complex, making computation challenging. Therefore, the objective of this paper is to compute the three-phase electric field using ANSYS Maxwell software based on the finite element method (FEM). Each phase is calculated separately to reduce computation time. First, a three-dimensional (3D) model of the composite cross-arm is simulated in a closed domain. Then, the average potential from a two-dimensional (2D) model is defined as a boundary condition for the 3D model. Finally, the maximum electric field values in each phase are compared. Results show that the highest electric field occurs at phase B, and the electric field of the tension-type grading ring is slightly higher than other ring types. However, all values remain below the electric field criteria

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Modified: 2026-04-01

Issued: 2026-04-01

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BibliograpyCitation : In Prince of Songkla University. College of Computing. The 17th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON 2020) (pp.308-311). Pattani : Prince of Songkla University

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