Optimizing corona ring design for 400 kV cap-pin string insulator to minimize surface electric field under various surface conditions

Salhi, Rabie, Mekhaldi, Abdelouahab, Teguar, Madjid and Kherif, Omar 2024. Optimizing corona ring design for 400 kV cap-pin string insulator to minimize surface electric field under various surface conditions. Presented at: International Conference on Electrical Engineering and Advanced Technology (ICEEAT), 05-07 November 2023. Proceedings 2023 International Conference on Electrical Engineering and Advanced Technology (ICEEAT). IEEE, 10.1109/ICEEAT60471.2023.10426163

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Abstract

The objective of this paper is to reduce the electric field stress along the surface of the 400 kV cap-pin string insulator by optimizing its corona ring design. The cap-pin string insulator, composed of glass material and consisting of 1512 L units, is designed and investigated within a 2D-axisymmetric environment using COMSOL software. Firstly, we optimize the corona ring’s radius, tube radius, and height. Secondly, the corona ring shape is optimized to more effectively decrease the surface electric field, despite the resulting increase in its weight. Finally, the optimized shape is replaced by multiple corona rings, each with a small radius, positioned in the most deformed area, to enhance the insulator’s performance in terms of both surface electric field and corona ring weight. The COBYLA algorithm is utilized as the optimization method throughout the study. This research examines clean, uniformly polluted, and Room Temperature Vulcanizing (RTV) silicon rubber-coated surface conditions. The obtained results are presented and discussed.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Published Online
Status:	Published
Schools:	Engineering
Publisher:	IEEE
ISBN:	979-8-3503-8348-5
Last Modified:	10 Apr 2024 16:00
URI:	https://orca.cardiff.ac.uk/id/eprint/167756

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