不同压力对EPDM中电荷输运的影响

doi:10.11930/j.issn.1004-9649.202006016

中国电力 ›› 2021, Vol. 54 ›› Issue (4): 19-25.DOI: 10.11930/j.issn.1004-9649.202006016

• 高压电缆及附件关键技术专栏 • 上一篇下一篇

不同压力对EPDM中电荷输运的影响

贺逸飞, 吴锴, 吴洋, 汪京昊, 张春阳

西安交通大学电力设备与电气绝缘国家重点实验室, 陕西西安 710049

收稿日期:2020-06-01 修回日期:2020-07-22 发布日期:2021-04-23
作者简介:贺逸飞(1995-),男,博士研究生,从事空间电荷形成以及电荷输运机理研究,E-mail:784316492@qq.com;吴锴(1969-),男,教授,博士生导师,通信作者,从事绝缘材料电老化及击穿理论、局部放电检测及内在机理、城市能源系统优化等研究。E-mail:wukai@xjtu.edu.cn
基金资助:
国家重点研发计划资助项目（2016YFB0900703）

Impact of Different Pressures on Charge Transport in EPDM

HE Yifei, WU Kai, WU Yang, WANG Jinghao, ZHANG Chunyang

State Key Lab. of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China

Received:2020-06-01 Revised:2020-07-22 Published:2021-04-23
Supported by:
This work is supported by National Key Research and Devlopment Program of China (No.2016YFB0900703)

摘要/Abstract

摘要： 三元乙丙橡胶（EPDM）作为一种高质量的绝缘材料，被广泛用于电缆接头的附件中，但其在电缆实际运行中承受较大的压力，这可能会影响绝缘性能。通过计算不同压力下EPDM中电荷输运的关键参数，如载流子迁移率的变化，研究压力对EPDM中电荷迁移的影响。通过设计单极载流子阻挡实验，并结合改进的电声脉冲法（PEA）测量设备，计算0.6~1.2 MPa（间隔0.2 MPa）范围内6种压力下EPDM中电子的迁移率。另外，通过跳跃电导模型对迁移率数据进行深入分析，发现在不同压力下EPDM中的迁移率没有显著变化，并且电子跃迁所需的能量和电子的跃迁距离也没有太大变化。结果表明：在电缆正常运行的工作环境下，压力不会影响EPDM的电气性能。

关键词: EPDM, 压力, 迁移率, 电荷输运, 空间电荷

Abstract: Ethylene-propelene-diene monomer (EPDM), as a high-quality insulation material, has been widely used in accessories of cable joints, but it bears a large compressive pressure in the working environment, which may affect its insulation performance. We conduct a study on the effect of pressures on charge transfer in EPDM by calculating the change of key parameters such as carrier mobility in EPDM at different pressures. By designing a unipolar carrier blocking experiment and using the improved pulsed electro-acoustic (PEA) measurement device, we calculate the mobility of electrons in EPDM at six pressures between 0.2 MPa and1.2 MPa (at interval of 0.2 MPa). In addition, an analysis of the mobility with hopping conduction model shows that the mobility in EPDM does not change significantly with different pressures, and the electron transition distance and the required energy also have no obvious variations. It is concluded that under normal working conditions, pressures do not affect the electrical performance of EPDM.

Key words: EPDM, pressure, mobility, charge transport, space charge

贺逸飞, 吴锴, 吴洋, 汪京昊, 张春阳. 不同压力对EPDM中电荷输运的影响[J]. 中国电力, 2021, 54(4): 19-25.

HE Yifei, WU Kai, WU Yang, WANG Jinghao, ZHANG Chunyang. Impact of Different Pressures on Charge Transport in EPDM[J]. Electric Power, 2021, 54(4): 19-25.

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