Reduction of electric-field intensification and hot-spot formation inside cable terminations

MELECON 2014 - 2014 17th IEEE Mediterranean Electrotechnical Conference Pub Date : 2014-04-13 DOI:10.1109/MELCON.2014.6820530

I. Metwally, A. Al-Badi, A. Al-Hinai, M. Al-Mayasi, A. Al-Harthi, K. Al-Hashmi, I. Al-Zaabi

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引用次数: 3

Abstract

This paper presents a 2d finite-element analysis for a 33-kV, three-phase, three-core cross-linked polyethylene (XLPE) power cable termination. To enhance the cable termination lifetime, many factors are examined to reduce the electric-field intensification and the induced current density in the copper sheath. The aim of this simulation is to investigate how the electric and the induced current density distributions can be reduced to avoid partial discharge activities and hot spot formation, respectively. In the electrostatic analysis, the electric-field distributions are studied for unpolluted and polluted cases and with different relative permittivities of each layer. In addition, two methods of stress relief are also investigated, namely, the stress control cone and stress control tube. In the magnetic analysis, three cases are investigated at the rated ampacity of the cable, namely, balanced, unbalanced and single phasing, where the induced current density distributions are laterally computed.

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减少电缆终端内部的电场增强和热点形成

本文提出了一种33kv三相三芯交联聚乙烯(XLPE)电力电缆终端的二维有限元分析方法。为了提高电缆终端寿命，研究了降低铜套内电场强度和感应电流密度的多种因素。模拟的目的是研究如何减小电流和感应电流密度分布，以避免局部放电活动和热点形成。在静电分析中，研究了未污染和污染情况下各层相对介电常数不同时的电场分布。此外，还研究了应力控制锥和应力控制管两种消除应力的方法。在磁性分析中，研究了电缆在额定容率下的平衡、不平衡和单相三种情况，横向计算了感应电流密度分布。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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MELECON 2014 - 2014 17th IEEE Mediterranean Electrotechnical Conference

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