• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Graftable voltage stabilizer for enhancing insulation performance of crosslinked polyethylene
【24h】

Graftable voltage stabilizer for enhancing insulation performance of crosslinked polyethylene

机译：Graftable voltage stabilizer for enhancing insulation performance of crosslinked polyethylene

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

摘要

With the popular application of alternating current/direct current (AC/DC) hybrid power grid, ultra-high-voltage (UHV) AC/DC cables of long-distance and large-capacity transmission systems have been strongly demanded. Voltage stabilizers are widely used to resist AC electrical tree of cross-linked polyethylene (XLPE) insulation materials, but poor compatibility with polymer matrix limited improvement of DC insulation performance. In this research, the maleic anhydride-modified 2,4-dihydroxybenzophenone as a novel voltage stabilizer 4-(4-benzoyl-3-hydroxyphenoxy)-4-oxobut-2-enoic acid (MDVS) was synthesized to improve the electrical properties of XLPE. The XLPE-g-MDVS with different contents of MDVS was prepared, and both AC electrical properties and DC electrical properties were tested. The results indicate that the modified XLPE retain the characteristic of voltage stabilizer to resist AC electrical tree and improve breakdown strength, and to exhibit excellent DC insulation performance in a wide temperature range. In the comparison with the pristine XLPE, the graft of MDVS can significantly suppress space charge accumulation and decrease DC conductivity. At 70 degrees C, the maximum amount of space charge density of XLPE-g-1.2wtMDVS is 56.2 lower than that of XLPE, and the DC conductivity decreases by nearly two orders of magnitude. Furthermore, the DC breakdown strength of XLPE-g-1.2wtMDVS materials exhibit higher than that of the pristine XLPE. In addition to the self-excited energy dissipation of the voltage stabilizer, quantum chemical calculations demonstrated that the improvement of DC performance attributed to the deep traps introduced by MDVS.

著录项

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