Optimization of Corona Ring Design for 400 kV Polymeric Outdoor Insulator

Halloum, M-R and Subba Reddy, B and Razouk, Y (2022) Optimization of Corona Ring Design for 400 kV Polymeric Outdoor Insulator. In: 6th IEEE International Conference on Condition Assessment Techniques in Electrical Systems, CATCON 2022, 17 - 19 December 2022, Durgapur, pp. 156-160.

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Abstract

Polymeric outdoor insulators in transmission and distribution systems are becoming more common due to their various advantages. However, it is essential to control the electric stress of the composite insulators because of their organic nature, which is affected significantly by electrical discharges. Corona ring is a very effective tool to control the electric field in critical regions. In this study, a 3d model for the damaged field-aged 400 kV polymeric insulator is developed using COMSOL using the finite element method. The insulator was fitted with two corona rings at the HV terminal and one at the ground terminal of the split type. The optimization of the corona rings near both end-fittings is conducted using the optimization feature in COMSOL Multiphysics 5.5. We used the gradient-free (derivative-free) optimization algorithm (BOBYQA) in the optimizing module in COMSOL. The various parameters (ring height, ring radius, and tube radius) of both corona rings near the high voltage and ground ends are optimized. The results are compared without and with corona rings of old and optimized design. Finally, the corona inception level is determined. The promising results obtained from simulations showed improved field performance of the 400 kV composite insulator.

Item Type:	Conference Paper
Publication:	Proceedings of 2022 6th International Conference on Condition Assessment Techniques in Electrical Systems, CATCON 2022
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	3D modeling; Electric corona; Electric insulation; Electric power distribution; Electric power transmission; Multiphysics; Optimization, Composite insulators; Corona ring; Effective tool; Electric stress; Electrical discharges; Optimisations; Organics; Polymeric outdoor insulator; Stress control; Transmission and distribution systems, Finite element method
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	25 May 2023 07:58
Last Modified:	25 May 2023 07:58
URI:	https://eprints.iisc.ac.in/id/eprint/81535

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