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- Title
Analysis and aging evaluation method of frequency domain dielectric spectroscopy for high-voltage XLPE submarine cables.
- Authors
Zhang, Tao; Shi, Guangrui; Zhang, Nan; Du, Anqi; Wu, Qian
- Abstract
To assess the insulation aging in high-voltage XLPE submarine cables using frequency domain dielectric spectroscopy, this study presents a methodology for separating the polarization and conductance components from the dielectric response data by analyzing the physical significance of the complex dielectric constant. Initially, four sets of samples of high-voltage XLPE submarine cables exhibiting varying degrees of aging were procured, which were generated through accelerated aging tests and measured the mechanical properties and frequency domain dielectric spectra of these samples. Subsequently, the polarization and conductance components were separated from the measured dielectric curves to investigate the impact of aging on polarization and conductivity losses within the low-frequency range. Finally, the precision of the dielectric model in reconstructing the measured dielectric curves was compared, and characteristic parameters for quantifying the aging condition were suggested. The discoveries indicate that the polarization and conductance processes in the dielectric response of high-voltage XLPE submarine cables accelerate with increasing aging, and removing the conductivity loss from the imaginary part of the complex dielectric constant enhances the accuracy of the dielectric model in reconstructing the measured dielectric curves. The model parameters ∆ε, ε∞, and α can effectively characterize the aging state of XLPE insulation in high-voltage submarine cables, enabling the assessment of aging insulation in high-voltage XLPE submarine cables.
- Subjects
DIELECTRICS; EVALUATION methodology; SUBMARINE cables; PERMITTIVITY; ACCELERATED life testing; SPECTROMETRY
- Publication
Electrical Engineering, 2024, Vol 106, Issue 3, p3403
- ISSN
0948-7921
- Publication type
Article
- DOI
10.1007/s00202-023-02160-3