摘要详情
847 / 2022-05-26 20:55:01
Electrical tree characteristics dependent on cooling process of iPP/POE blend insulation
isotactic polypropylene;,crystallization conditions,AC electrical tree
全文被拒
IEEE ICHVE 2022 / 1-PAGE ABSTRACT
Electrical tree characteristics dependent on crystallization process of iPP/POE blend insulation
Famin Dai, Zhonglei Li*, Mingsheng Fan, Shoufan Zhou, Boxue Du
Key Laboratory of Smart Grid of Education Ministry, School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
lizhonglei@tju.edu.cn
Purpose/Aim
Compared with cross-linked polyethylene (XLPE), polypropylene (PP) has higher working temperature, better insulation performance and can be recycled, which is considered to be a substitution of XLPE insulation. This work focuses on the effect of cooling methods during crystallization on the AC electrical tree growth characteristics in iPP/POE blend insulation.
Experimental/Modeling methods
The cooling rate of iPP/POE blend insulation is 10, 5 and 2.5 ℃/min, and the crystallization morphology is characterized by polarized optical microscopy (POM). The melting enthalpy of the iPP/POE blend insulation is measured by differential scanning calorimetry (DSC) test. Dumbbell shaped specimen is stamped for tensile test with a length of 75 mm, a width of 12.5 mm, and a thickness of 1 mm. The AC voltage of electrical tree experiment is set to 8kV, and the photos electrical tree of samples were taken by the charge coupled device (CCD) lens and saved in the computer for later analysis.
Results/discussion
The breakdown strength of iPP/POE blend insulation and the electrical tree initial voltage elevates with the cooling rates increase from 2.5 to 10 ℃/min. The breakdown strength and electrical tree initial voltage of non-isothermal crystallization samples are higher than isothermal samples.
Conclusions
The spherulite size declines and the interface density of spherulites increases which introduces more deep traps. It is concluded that cooling rate can reduce the spherulite size of PP and then improve the electrical performance of PP cable insulation.
Appendix (Figure, table, image…)
Electrical tree characteristics dependent on crystallization process of iPP/POE blend insulation
Famin Dai, Zhonglei Li*, Mingsheng Fan, Shoufan Zhou, Boxue Du
Key Laboratory of Smart Grid of Education Ministry, School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
lizhonglei@tju.edu.cn
Purpose/Aim
Compared with cross-linked polyethylene (XLPE), polypropylene (PP) has higher working temperature, better insulation performance and can be recycled, which is considered to be a substitution of XLPE insulation. This work focuses on the effect of cooling methods during crystallization on the AC electrical tree growth characteristics in iPP/POE blend insulation.
Experimental/Modeling methods
The cooling rate of iPP/POE blend insulation is 10, 5 and 2.5 ℃/min, and the crystallization morphology is characterized by polarized optical microscopy (POM). The melting enthalpy of the iPP/POE blend insulation is measured by differential scanning calorimetry (DSC) test. Dumbbell shaped specimen is stamped for tensile test with a length of 75 mm, a width of 12.5 mm, and a thickness of 1 mm. The AC voltage of electrical tree experiment is set to 8kV, and the photos electrical tree of samples were taken by the charge coupled device (CCD) lens and saved in the computer for later analysis.
Results/discussion
The breakdown strength of iPP/POE blend insulation and the electrical tree initial voltage elevates with the cooling rates increase from 2.5 to 10 ℃/min. The breakdown strength and electrical tree initial voltage of non-isothermal crystallization samples are higher than isothermal samples.
Conclusions
The spherulite size declines and the interface density of spherulites increases which introduces more deep traps. It is concluded that cooling rate can reduce the spherulite size of PP and then improve the electrical performance of PP cable insulation.
Appendix (Figure, table, image…)
重要日期
-
会议日期
09月25日
2022
至09月29日
2022
-
08月15日 2022
提前注册日期
-
09月10日 2022
报告提交截止日期
-
11月10日 2022
注册截止日期
-
11月30日 2022
初稿截稿日期
-
11月30日 2022
终稿截稿日期
主办单位
IEEE DEIS
承办单位
Chongqing University
联系方式
- Zhengyong Huang
- 61******@qq.com
历届会议
-
2020年09月06日 中国 Beijing
2020 IEEE International Conference on High Voltage Engineering and Application -
2018年09月10日 希腊
2018 IEEE International Conference on High Voltage Engineering and Application -
2016年09月19日 中国 Chengdu, China
2016 IEEE International Conference on High Voltage Engineering and Application
