三条230kV交联聚乙烯电缆的失效分析

2010 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America (T&D-LA) Pub Date : 2010-11-01 DOI:10.1109/TDC-LA.2010.5762855

C. Su

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引用次数: 25

摘要

本文对三条230kV交联聚乙烯电缆的故障进行了实例分析。这些电缆只用了4年就坏了。发现铜编织玻璃纤维(CWFG)胶带和遇水膨胀胶带有较多的烧渍。分析了这些污渍产生的原因。理论分析和实验研究证明了外半导电屏与铝护套接触不良的问题。在运行过程中，系统交流电压的充电电流损坏了半导电层，导致绝缘击穿。本文还讨论了这些失败的经验教训。

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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Failure analysis of three 230kV XLPE cables

This paper presents a case study on the failures of three 230kV XLPE cables. These cables failed after only 4 years of service. It was found that the copper woven fibre glass (CWFG) tape and the water swellable tape had many burnt stains. The causes of these stains were analysed. It was proved from theoretical analysis and experimental investigations that there was a problem of bad contact between the outer semi-conductive screen and the aluminum sheath. During operation, the charging current from system ac voltage damaged the semi-conductive layer and caused the insulation breakdown. The lessons learnt from these failures are also discussed in the paper.

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2010 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America (T&D-LA)

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