等离子界面修改赋予双层聚烯绝缘与压制空间电荷和增强破裂强度的海底电缆联合
Zhonglei Li1, Zhaorui Luo1, Zhong Zheng1
1School of Electrical Automation and Information Engineering, Tianjin University, Tianjin 300072, China.
Langmuir : the ACS journal of surfaces and colloids
|October 30, 2025
概括
这项研究通过使用Ar驱动的介电屏障放电系统来改造绝缘接口来增强高压海底电缆接头. 优化的处理减少了电荷积累,增加了断裂强度,延长了电缆的寿命.
科学领域:
- 材料科学 材料科学 材料科学
- 电气工程 电气工程
- 等离子体物理学的物理学
背景情况:
- 高压直流 (HVDC) 海底电缆对于清洁能源传输至关重要,但由于长度限制,需要电缆接头进行拼接.
- 连接处的电缆绝缘 (CI) 和增强绝缘之间的接口容易导致电荷积累,导致绝缘故障.
- 现有的电缆接头设计在管理接口充电行为和确保长期可靠性方面面临挑战.
研究的目的:
- 在HVDC海底电缆接头中开发聚合物 (PP) 双层绝缘的接口修改策略.
- 研究Ar驱动的介电屏障放电与H2O对接口特性和性能的影响.
- 通过表面修改和功能组合,阐明了通过表面修改和功能组合来提高绝缘性能背后的机制.
主要方法:
- 建造一个Ar驱动的介电屏障放电系统来处理绝缘接口.
- 优化处理参数:处理时间和H2O前体度.
- 使用实验方法和密度函数理论 (DFT) 方法对界面形态,电荷积累,分解强度和陷特性进行表征.
主要成果:
- 最佳处理 (7分钟,1.0%H2O) 蚀刻了表面尖峰,减少了微缺陷,抑制了异质电荷积累66%,并增加了8.2%的分解强度.
- 加入H2O引入含氧组 (-OH, -OCH3),增加陷深度 (1.06至1.15 eV) 和深陷密度.
- DFT计算证实了统一的接口可以减少电场扭曲和电荷注入;氧气组作为电荷捕获中心,阻碍电荷迁移.
结论:
- 拟议的接口修改策略有效地提高了PP双层绝缘对HVDC海底电缆接头的性能.
- 表面蚀刻和功能组结合协同减少界面电荷积累,增强介电强度.
- 这种方法为制造高性能,持久的海底电缆接头提供了有价值的参考.
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