Abstract
Cross-linked polyethylene (XLPE) has been widely used in high voltage power cables as insulation material due to its superior mechanical and electrical performance. Thermal aging causes irreversible chemical and morphological change that may strongly reduce the dielectric strength of XLPE, producing a limitation to the effective service life of the power cables. Therefore, it is worthwhile to monitor the aging condition of XLPE insulation so that the safety of the power system can be ensured. Terahertz technology has attracted much attention because many molecular structure information is involved in terahertz frequency. In this paper, terahertz time-domain spectroscopy (THz-TDS) was employed to study the effect of thermal aging on XLPE power cable insulation. XLPE sheets were aged at 130 °C for different periods in an air forced oven. The pristine and aged samples were studied by differential scanning calorimeter (DSC) and the crystallinity were determined. The extent of oxidation of the insulations were assessed by Fourier transform infrared (FTIR) spectroscopy. Our experimental results show that the index of refraction and relative dielectric constant in the frequency range from 0.5–2 THz increase with aging time. The aged samples show an increase in oxidation products and a decrease in the crystallinity, which indicates the molecular chain scission and oxidation. This result suggests that THz-TDS has potential to obtain information about the cable insulation condition.
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References
Li, W., Li, J., Yin, G., Li, S., Zhao, J., Ouyang, B., Ohki, Y.: Frequency dependence of breakdown performance of XLPE with different artificial defects. IEEE TDEI 4(19), 1351–1359 (2012)
Boukezzi, L., Boubakeur, A., Lallouani, M.: Effect of artificial thermal aging on the crystallinity of XLPE insulation cables: X-ray study. In: Conference on Electrical Insulation & Dielectric Phenomena, pp. 65–68. IEEE, Canada (2007)
Linde, E., Verardi, L., Fabiani, D., Gedde, U.W.: Dielectric spectroscopy as a condition monitoring technique for cable insulation based on crosslinked polyethylene. Polym. Test. 44, 135–142 (2015)
Ferguson, B., Zhang, X.: Materials for terahertz science and technology. Nat. Mater. 1(1), 26–33 (2002)
Li, M., Tong, M., Flecher, J., Dong, Z.: A novel approach to investigate the deterioration of insulation of oils in power transformers with terahertz time-domain spectroscopy. IEEE TDEI 2(24), 930–938 (2017)
Yan, Z., Shi, W., Hou, L., Xu, M., Yang, L., Dong, C., Li, S.: Investigation of aging effects in cross-linked polyethylene insulated cable using terahertz waves. Mater. Res. Express 1(4), 015304 (2017)
Komatsu, M., Ohki, Y., Mizuno, M., Fukunaga, K.: Terahertz spectroscopic observation of cross-linked polyethylene aged simultaneously by heat and gamma-rays. In: 10th International Conference on the Properties and Applications of Dielectric Materials. IEEE, India (2012)
Withayachumnankul, W., Naftaly, M.: Fundamentals of measurement in terahertz time-domain spectroscopy. J. Infrared Millim. Terahertz 8(35), 610–637 (2014)
Liu, X., Yu, Q., Liu, M., Li, Y., Zhong, L., Fu, M., Hou, S.: DC electrical breakdown dependence on the radial position of specimens within HVDc XLPE cable insulation. IEEE TDEI 3(24), 1476–1484 (2017)
Xu, Y., Luo, P., Xu, M., Sun, T.: Investigation on insulation material morphological structure of 110 and 220 kV XLPE retired cables for reusing. IEEE TDEI 4(21), 1687–1696 (2014)
Gulmine, J., Akcelrud, L.: FTIR characterization of aged XLPE. Polym. Test. 7(25), 932–942 (2006)
Pearce, E.: Polymers: chemistry and physics of modern materials. J. Polym. Sci. Pol. Chem. 8(30), 1777 (1992)
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Zhang, Y., Lian, Z., Li, J., Li, S. (2020). Terahertz Time-Domain Spectroscopy Characterization of Aged XLPE Cable Insulation. In: Németh, B. (eds) Proceedings of the 21st International Symposium on High Voltage Engineering. ISH 2019. Lecture Notes in Electrical Engineering, vol 598. Springer, Cham. https://doi.org/10.1007/978-3-030-31676-1_82
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DOI: https://doi.org/10.1007/978-3-030-31676-1_82
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