交联温度对XLPE二次交联绝缘接口层的绝缘性能的影响
Ming Hu1, Hongliang Zhang2, Xufei Ge2
1College of Mechanical and Electrical Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Polymers
|April 12, 2025
概括
优化交联聚乙烯 (XLPE) 电缆绝缘的二次交联温度可以提高电气性能. 180°C左右的温度最大化了断裂电压,但过度的热量会降低晶体性和绝缘性能.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 电气工程 电气工程
背景情况:
- 交联聚乙烯 (XLPE) 是高压电缆绝缘的关键材料.
- 接口层的特性显著影响了整体电缆性能.
- 二次交联温度是影响XLPE微观结构和介电性能的关键因素.
研究的目的:
- 为了研究二次交联温度对XLPE接口层的绝缘性能的影响.
- 为了确定二次交叉连接的最佳温度范围,以增强XLPE电缆绝缘.
- 了解加工温度与XLPE的机械和电气性能之间的关系.
主要方法:
- 商用XLPE电缆颗粒通过在不同温度 (140°C,160°C,180°C,200°C) 进行平面热压加工.
- 描述包括凝含量,差分扫描热量计 (DSC),热延长,功率频率故障电压测试和扫描电子显微镜 (SEM).
- 分析的关键参数是交联度,晶度,热延长和特征性断裂电压.
主要成果:
- 增加二次交叉连接温度通常会增加交叉连接度.
- 热延长最初减少,然后随着温度升高而增加.
- 结晶度显示出整体下降趋势,而特征性断裂电压在180°C达到峰值,然后下降.
结论:
- 二次交叉连接温度对XLPE绝缘接口层的机械和电气性能产生重大影响.
- 确定了180°C的最佳温度,以最大限度地提高特征性故障电压.
- 过高的温度会对绝缘性能产生负面影响,因为结晶性降低.
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