在极性逆转电场下对聚烯绝缘材料空间电荷特性进行研究
Xinhua Dong1, Guodong Bao1, Wei Wang1
1State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China.
接种修改显著提高了高压电缆的聚烯 (PP) 绝缘. 修改后的PP (PPG-2) 显示了改进的电气性能,减少电荷积累和电场扭曲,以确保可靠的电缆运行.
科学领域:
- 材料科学 材料科学 材料科学
- 电气工程 电气工程
- 聚合物科学 聚合物科学
背景情况:
- 高压 (HV) 电缆面临着由于电压极性逆转而积累空间电荷的绝缘挑战.
- 这种电荷积累会扭曲内部电场,可能导致绝缘故障.
- 聚烯 (PP) 是一种常见的电缆绝缘材料,需要增强的电气性能.
研究的目的:
- 调查接种修改对聚烯 (PP) 的电绝缘性能的影响.
- 确定最佳的接种策略,以提高PP在HV电缆应用中的性能.
- 阐明接种增强PP介电特性的机制.
主要方法:
- 用特定的单体对聚烯 (PP) 的移植修饰.
- 综合性电特性表征,包括断裂强度和临界电场.
- 在电压极性逆转条件下对空间电荷积累的分析.
- 在修改后的PP样本中调查陷特征.
主要成果:
- 接种修改显著改善了PP的电特性.
- 与未经修改的PP相比,PPG-2表现出卓越的性能,故障强度增加了39.27%,临界电场增加了36.52%.
- 在电压极性逆转后,PPG-2显示出最小的电荷积累.
- 接种引入了深深的陷,有效地抑制了电荷载体的注入和迁移.
结论:
- 接种修改是一种有效的策略,可以提高聚烯的电绝缘性能.
- 通过接种引入深陷是提高性能的主要机制.
- 优化接种PP (PPG-2) 为高性能电缆绝缘提供了有希望的解决方案,提高了HV应用中的可靠性.
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