中国电机工程学报2016，Vol.36Issue(7)：2008-2017,10.DOI:10.13334/j.0258-8013.pcsee.2016.07.029
高温高场强下XLPE及其纳米复合材料电导机制转变的实验研究
Experimental Study on the Transference of Conduction Mechanisms of XLPE and its Nano-composite Under High Temperature and High Electrical Stress
王霞 1王陈诚 1孙晓彤 1吴锴 1屠德民1
作者信息
- 1. 电力设备电气绝缘国家重点实验室 西安交通大学，陕西省西安市 710049
- 折叠
摘要
Abstract
To research the current properties of pure cross- linked polyethylene (XLPE) and XLPE/SiO2nano-composite material, their current densities were measured under different temperatures (e.g. 20, 50 and 80℃) and under different stresses from 2 to 70 kV/mm respectively. Besides, some mathematical formations of conduction mechanism were used to fit the experimental results and analyze the transference of the above two kinds of XLPE’s conduction mechanisms in non-ohmic region. It shows that the conduction of the two kinds of XLPE can be influenced by temperature, electrical stress, nano-composite and electrical pre-stressing. The analysis results show that conduction mechanisms of the above two kinds of XLPE transfer from ohmic conductivity to bulk-limited effect (Poole-Frenkel) firstly and then to electrode-limited effect (Schottky) if the electrical stress improves gradually. Moreover, the higher the temperature,the lower the transferring threshold field. The doped nano- composite and electrical pre-stressing process can improve the threshold field and the doped nano-composite can also reduce the current density effectively. In addition, pre-stress process facilitates to improve the injection threshold and reduce the current density.关键词
高压直流/XLPE/纳米复合材料/电场/温度/电导机制Key words
HVDC/XLPE/nano-composite/electrical stress/temperature/conduction mechanism分类
信息技术与安全科学引用本文复制引用
王霞,王陈诚,孙晓彤,吴锴,屠德民..高温高场强下XLPE及其纳米复合材料电导机制转变的实验研究[J].中国电机工程学报,2016,36(7):2008-2017,10.
