Study on Controlled Water Tree Degradation in Power Cable

电力电缆中水树可控降解研究

• 批准号: 13650303
• 负责人: NAGAO Masayuki
• 金额: $ 2.24万
• 依托单位: TOYOHASHI UNIVERSITY OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650303/
• 关键词: power cable; water tree; teeing phenomena; space charge; degradation

Water treeing is one of the major degradation mechanisms of power cable with polymeric insulation evolving in the presence of an ac field and of water. Water tree retardant characteristics of polyethylene (PE) were investigated. We were measuring dc leakage currents, observing tree shapes and analyzing aging time dependence of tree numbers and length distribution. It seems to be more different for water trees to redevelop in PE. Here, it is considered that pendent silane plays role of water tree retardant. The condensed silanol groups among PE molecules might act as obstruction to water initiation and growth. From these results, the silanol groups in PE are expected to suppress the water tree degradation. The lengths of water tree decreased with the increase in the amount of HDPE up to 9.1wt%. High crytallinity would suppress the water tree that is believed to grow through amorphous rich region. Water trapping at interface on HDPE cluster would also affect the water tree retardation.

水树现象是聚合物绝缘电力电缆在交流场和水的存在下发生的主要退化机制之一。研究了聚乙烯（PE）的水树阻燃特性。我们测量直流泄漏电流，观察树木形状并分析树木数量和长度分布的老化时间依赖性。水树在PE中重新发育似乎更不一样。这里，认为悬垂的硅烷起到水树阻燃剂的作用。 PE 分子中的缩合硅烷醇基团可能会阻碍水的引发和生长。从这些结果来看，PE 中的硅烷醇基团有望抑制水树降解。随着HDPE用量增加至9.1wt%，水树长度减小。高结晶度会抑制水树，水树被认为是通过无定形富集区域生长的。 HDPE 簇界面处的水滞留也会影响水树延迟。

项目成果

NAGAO Masayuki: "Effect of Filler on Treeing Phenomenon in Epoxy Resin under AC Voltage"Conference Proceedings : 2001 International Symposium on Electrical Insulating Materials (ISEIM'01). Q-1. 611-614 (2001)

NAGAO Masayuki：“交流电压下填料对环氧树脂中树状现象的影响”会议记录：2001 年国际电绝缘材料研讨会（ISEIM01）。

藤井 雅之: "交流高電界下における高分子フィルムの静電容量変化にもとづく空間電荷挙動の検討"電気学会論文誌A. 121・7. 689-698 (2001)

Masayuki Fujii：“基于高交流电场下聚合物薄膜电容变化的空间电荷行为研究”日本电气工程师学会会刊 A. 121・7 (2001)。

FUJII Masayuki: "Space Charge Behavior in Polymer Film Based on Increment of Capacitance under AC high Field"T.IEE Japan. Vol.121-A, No.7. 689-695 (2001)

FUJII Masayuki：“基于交流高场下电容增量的聚合物薄膜中的空间电荷行为”T.IEE Japan。

FUJII Masayuki: "Study on the Increment of Charging Current of Polymer Film in AC High-Field Region near Breakdown"T.IEE Japan. Vol.121-A, No.6. 573-579 (2001)

藤井雅之：“接近击穿时交流高场区聚合物薄膜充电电流增量的研究”T.IEE Japan。

西岡幸治: "エポキシ樹脂の交流トリーイング特性に及ぼす充填剤の影響(II)"電気学会誘電・絶縁材料研究会. DEI-01-96. 7-10 (2001)

Koji Nishioka：“填料对环氧树脂 AC 树形性能的影响 (II)”IEEJ 介电和绝缘材料研究组。DEI-01-96 (2001)。