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Investigation on non-linear grading material as stress control on medium voltage cable termination

Mahd Rawe, Siti Nur Aishah (2014) Investigation on non-linear grading material as stress control on medium voltage cable termination. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

Power cable terminations are widely used in power system networks for a last few decades. A proper design of cable termination is essential in reducing the electric field distribution around the end of high voltage cable. At the termination of cable, the electric field was usually the highest, for the insulation layer was cut in this place. And with the high electric field at the cutting point, there were surely partial discharge occurs. In order to overcome this issue, some sorts of method were proposed. Stress control geometry method and non-linear properties of Zinc Oxide Microvaristor method have been used in this research. The aim was to find an optimal solution for the electric field distribution. An 11kV power cable has been modelled for this study by using Finite Elements Method (FEM) computational solution. The model has been used to simulate the electric field distribution in the cable termination. The structure of terminations and the critical parts in this design were also defined through literature. A non-linear grading has been applied to several design of layer insulation. The proposed model was used to covers the point that generate high fields at screen cable insulation. Material properties play a key role in suppresses electric field spread throughout termination area. Based on the switching point of about 1kV/cm the material changes its conductivity significantly. In this way it prevents the occurrence of electric fields which are above this switching point. Different thicknesses also were introduced to get a better design and economically to produce in cost advantages. This research successfully examines the effectiveness for both methods in controlling field stress at cable screen termination.

Item Type: Thesis (Masters)
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3001-3521 Distribution or transmission of electric power
Depositing User: Normajihan Abd. Rahman
Date Deposited: 25 Jun 2014 00:57
Last Modified: 28 Sep 2020 03:31
URI: http://eprints.uthm.edu.my/id/eprint/5543
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