...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Transactions on Power Delivery >Evaluation of jacket materials and configurations and effect of moisture absorbing materials on preventing water tree growth in power cables
【24h】

Evaluation of jacket materials and configurations and effect of moisture absorbing materials on preventing water tree growth in power cables

机译：评估护套材料和结构以及吸湿材料对电力电缆中水树生长的预防作用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Polymer insulated medium voltage cables have experienced premature failures in-service, due in large part to water treeing. Research has shown that the initiation sites of these water trees are often located where there are stress enhancements at the insulation/semiconducting shield interface and where water soluble contaminants permeate into the insulation. Material suppliers, cable manufacturers and users have introduced improved materials and cable designs as well as processing, manufacturing, transport, storage, and installation techniques that minimize contamination. Despite these advancements, gradual contamination can still occur due to the diffusion of ground water into the insulation. In fact, certain contaminants that are carried through the semiconductor/insulation shield interfaces tend to promote water tree growth. Manufacturers are now beginning to recognise this problem and have suggested the use of moisture resistant cables with jackets made of PVC, polyethylene or metal/polymer laminates along with underjacket water absorbing materials. This paper discusses the effectiveness of different jackets and materials and presents data on the effectiveness of water absorbing materials in delaying water permeation into the insulation. A simple and efficient cable-cell technique was developed which monitored the effectiveness of complete cable designs, by measuring the long-term water permeation resistance of short lengths of distribution class cables.
机译：聚合物绝缘中压电缆在使用中会过早失效，这在很大程度上是由于水树造成的。研究表明，这些水树的起始位置通常位于绝缘/半导体屏蔽界面处应力增强的位置，以及水溶性污染物渗透到绝缘中的位置。材料供应商，电缆制造商和用户已经引入了改进的材料和电缆设计，以及减少污染的加工，制造，运输，存储和安装技术。尽管取得了这些进步，但由于地下水扩散到绝缘材料中，仍然会逐渐发生污染。实际上，通过半导体/绝缘屏蔽界面携带的某些污染物往往会促进水树的生长。现在，制造商开始认识到这个问题，并建议将防潮电缆与由PVC，聚乙烯或金属/聚合物层压板制成的护套一起使用，并搭配下层吸水材料。本文讨论了不同护套和材料的有效性，并提供了有关吸水材料在延迟水渗透到绝缘体中的有效性的数据。开发了一种简单有效的电缆-电池技术，该技术通过测量短长度的配电级电缆的长期耐水渗透性来监控整个电缆设计的有效性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号