Home Journals Articles Updates About
CN
image
收藏切换
Research on XLPE ageing evaluation based on terahertz time-domain spectroscopy
收藏切换
PDF
Ze LIAN1, Xinyu LI2, Hua YU1, Yang FENG2, Shengtao LI2
Insulating Materials | 2023, 56(10) : 98 - 106
Less
收藏切换
Insulating Materials | 2023, 56(10): 98-106
• Test and Analysis •
Research on XLPE ageing evaluation based on terahertz time-domain spectroscopy
Full
Ze LIAN1, Xinyu LI2, Hua YU1, Yang FENG2, Shengtao LI2
Affiliations
  • 1Electric Power Research Institute of State Grid Shanxi Electric Power Corporation, Taiyuan 030001; China
  • 2State Key Laboratory of Electrical Insulation and Power Equipment, Xi′an Jiaotong University, Xi′an 710049, China
Published: 2023-10-20 doi: 10.16790/j.cnki.1009-9239.im.2023.10.013
Outline
收藏切换

Reasonable prediction of the ageing state of cross-linked polyethylene (XLPE) cables and timely replacement of severely aged cables are very important for the stable operation of power grid. In this paper, XLPE insulated cable samples were subjected to accelerated thermal ageing test at 145℃.The microphysical and chemical properties of these samples were analyzed, and the correlation between dielectric parameters and microstructure of terahertz frequency range was established. The results show that with the increase of aging time, the crystallinity and thermal stability of XLPE decrease, while the carbonyl index increases, indicating that the ageing degree of XLPE is gradually intensified. In the terahertz frequency range, the real part of the dielectric constant is affected by the combination of multiple structural factors such as crystallinity and polar group content, resulting in an unclear relationship with ageing time. However, the change of the imaginary part of dielectric constant is mainly caused by the dipole high elastic polarization of polar groups, showing a trend of gradually increasing with the ageing time. After fitting, it is found that the imaginary part of dielectric constant is positively correlated with the carbonyl index. Therefore, the imaginary part of dielectric constant in the terahertz frequency range can well reflect the ageing degree of XLPE.

cross-linked polyethylene  /  terahertz time-domain spectroscopy  /  thermal ageing  /  nondestructive testing
Ze LIAN, Xinyu LI, Hua YU, Yang FENG, Shengtao LI. Research on XLPE ageing evaluation based on terahertz time-domain spectroscopy[J]. Insulating Materials, 2023 , 56 (10) : 98 -106 . DOI: 10.16790/j.cnki.1009-9239.im.2023.10.013
Appendix
Less
Year 2023 volume 56 Issue 10
PDF
163
75
Cite this Article
BibTeX
Article Info
doi: 10.16790/j.cnki.1009-9239.im.2023.10.013
  • Receive Date：2022-11-14
  • Online Date：2025-11-24
  • Published：2023-10-20
Article Data
Affiliations
History
  • Received：2022-11-14
  • Revised：2023-01-12
Funding
Affiliations
    1Electric Power Research Institute of State Grid Shanxi Electric Power Corporation, Taiyuan 030001; China
    2State Key Laboratory of Electrical Insulation and Power Equipment, Xi′an Jiaotong University, Xi′an 710049, China
References
Share
https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2023.10.013
Share to
QR

Scan QR to access full text

Cite this article
BibTeX
Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
关闭全屏
  • BibTeX
  • EndNote
  • RefWorks
  • TxT
Links
Articles
Latest Articles
Most Read
Collections
Updates
Events
News
Multimedia
About
About Us
Contact
No. 86 Xueyuan South Road, Haidian District, Beijing
100081
010-62199257
qkjq@cast.org.cn

Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House