Analysis of aging state of cable insulation sheath based on terahertz time-domain spectroscopy

Haifeng Liu; Weiwei Chi; Zhilei Li; Fang Xie; Limei Zhou; Yangyang Liu

doi:10.1117/12.2648718

14 October 2022 Analysis of aging state of cable insulation sheath based on terahertz time-domain spectroscopy

Haifeng Liu, Weiwei Chi, Zhilei Li, Fang Xie, Limei Zhou, Yangyang Liu

Proceedings Volume 12343, 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022); 123430V (2022) https://doi.org/10.1117/12.2648718
Event: 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022), 2022, Qingdao, China

Abstract

Aging of insulation sheath material of power transmission line could damage the performance of insulation cable, causing potential safety problems. In order to study aging characteristics of the insulation sheath of power cable, we present a method to characterize the aging state of cable insulation sheath based on terahertz time domain spectroscopy (THz-TDS). The relationship between the aging degree of the insulation sheath and the absorption coefficient under the terahertz transmission mode is proposed by analyzing the terahertz transmission spectrum of the insulation sheath. The results showed that the cable insulation sheath with different aging degrees have different absorption characteristics in terahertz band, and the absorption characteristics and absorption coefficient were increased as time extended. Aging of insulation components in power transmission equipment is difficult to evaluate by conventional methods, which led to potential safety hazard of power facilities, especially in the long-term operation of power cables. The results showed that terahertz wave was precision in measure of aging characterization of power cable insulation, and it could play a great role in aging measurement of power cable insulation.

Citation Download Citation

Haifeng Liu, Weiwei Chi, Zhilei Li, Fang Xie, Limei Zhou, and Yangyang Liu "Analysis of aging state of cable insulation sheath based on terahertz time-domain spectroscopy", Proc. SPIE 12343, 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022), 123430V (14 October 2022); https://doi.org/10.1117/12.2648718

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KEYWORDS

Terahertz radiation

Absorption

Terahertz spectroscopy

Dielectrics

Refractive index

Wave propagation

Reflection

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