TY - GEN
T1 - Evolution of dielectric properties of cross-linked polyethylene under thermal-oxidative aging
AU - Wang, Jingran
AU - Ji, Minzun
AU - Zhuang, Hongwei
AU - Wei, Wei
AU - Chi, Xiaohong
AU - Cheng, Lu
AU - Liu, Wenfeng
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - An investigation of thermal-oxidative degradation of cross-linked polyethylene (XLPE) has been carried out in this paper. As the key characteristics, dielectric properties are important for assessing the insulation state of cables. XLPE specimens were thermally aged at 165 °C and removed at regular intervals for analysis. The dielectric properties were investigated through the Frequency Domain Spectroscopy (FDS) and the structural changes were analyzed with the Fourier transform infrared (FT-IR) spectroscopy. And the Haviliak-Negami dielectric model is applied to extract the characteristic parameters. The experiment and fitting results show that the dipolar polarization strength Δϵα, the DC conductivity σdc, the relative permittivity at high frequency ϵ∞, and the thermal expansion coefficient β increase gradually with the aging time. It is found that the quantitative analysis of the frequency domain spectroscopy can be well applied to the state assessment of XLPE cables.
AB - An investigation of thermal-oxidative degradation of cross-linked polyethylene (XLPE) has been carried out in this paper. As the key characteristics, dielectric properties are important for assessing the insulation state of cables. XLPE specimens were thermally aged at 165 °C and removed at regular intervals for analysis. The dielectric properties were investigated through the Frequency Domain Spectroscopy (FDS) and the structural changes were analyzed with the Fourier transform infrared (FT-IR) spectroscopy. And the Haviliak-Negami dielectric model is applied to extract the characteristic parameters. The experiment and fitting results show that the dipolar polarization strength Δϵα, the DC conductivity σdc, the relative permittivity at high frequency ϵ∞, and the thermal expansion coefficient β increase gradually with the aging time. It is found that the quantitative analysis of the frequency domain spectroscopy can be well applied to the state assessment of XLPE cables.
KW - dielectric property
KW - Haviliak-Negami dielectric model
KW - thermal-oxidative ageing
KW - XLPE
UR - https://www.scopus.com/pages/publications/85143968923
U2 - 10.1109/ICHVE53725.2022.9961652
DO - 10.1109/ICHVE53725.2022.9961652
M3 - 会议稿件
AN - SCOPUS:85143968923
T3 - 2022 IEEE International Conference on High Voltage Engineering and Applications, ICHVE 2022
BT - 2022 IEEE International Conference on High Voltage Engineering and Applications, ICHVE 2022
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2022 IEEE International Conference on High Voltage Engineering and Applications, ICHVE 2022
Y2 - 25 September 2022 through 29 September 2022
ER -