直流电场下聚合物空间电荷分布的极性效应

发布时间：2018-06-21 16:28

本文选题：直流电场 + 高压直流电缆　；参考：《中国电机工程学报》2016年24期

【摘要】：挤压型高压电缆用聚合物材料在直流电场作用下,空间电荷的分布具有极性效应。为了揭示引起极性效应的物理机制,该文引入双极电荷传输模型,考虑了双极性电荷的复合、俘获、脱陷等传输过程以及电极表面电荷的注入。通过参数化分析,辨别影响阴极和阳极空间电荷与电场非对称分布的主要物理参数。然后利用该模型仿真了均匀直流电场下聚丙烯空间电荷和电场分布,并与实验结果进行了比较。结果表明:聚丙烯空间电荷的非对称分布主要由迁移率和脱阱势垒决定,聚丙烯电场的非对称分布主要由迁移率和注入势垒决定,可为聚合物材料的调控提供理论依据。
[Abstract]:The space charge distribution of extruded high voltage cable polymer materials under DC electric field has polarity effect. In order to reveal the physical mechanism of the polarity effect, the bipolar charge transfer model is introduced in this paper. The recombination, capture and detrapping of the bipolar charge and the charge injection on the electrode surface are considered. The main physical parameters which affect the asymmetric distribution of space charge and electric field of cathode and anode are identified by parameterization analysis. Then the space charge and electric field distribution of polypropylene under uniform DC field are simulated and compared with the experimental results. The results show that the asymmetric distribution of space charge of polypropylene is mainly determined by mobility and well barrier, and the asymmetric distribution of electric field of polypropylene is mainly determined by mobility and injection barrier, which can provide a theoretical basis for the regulation of polymer materials.
【作者单位】：福州大学电气工程与自动化学院;清华大学电机工程与应用电子技术系;
【基金】：国家重点基础研究发展计划项目(973项目)(2014CB 239505)~~
【分类号】：TM247

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