Evaluation of high-voltage XLPE submarine cable insulation based on modified fractional Poynting-Thomson model

被引：0

作者：

Zhang T. ^{[1
]}

Shi G. ^{[1
]}

Zhang N. ^{[2
]}

Du A. ^{[3
]}

Wu Q. ^{[1
]}

机构：

[1] Engineering Technology Research Center for Power Transmission Line, China Three Gorges University, Yichang

[2] Anhui Branch of China Resources New Energy Investment Co., Ltd., Hefei

[3] State Grid Hubei Electric Power Co., Ltd., DC Company, Yichang

来源：

Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2024年 / 28卷 / 04期

关键词：

aging assessment; aging characteristic parameter; fractional Poynting-Thomson model; frequency domain dielectric spectra; high-voltage cross-linked polyethylene submarine cable; thermal aging;

D O I：

10.15938/j.emc.2024.04.007

中图分类号：

学科分类号：

摘要：

To accurately assess the insulation status of high-voltage cross-linked polyethylene (XLPE) submarine cables using the frequency domain dielectric spectroscopy, a modified fractional Poynting-Thomson model (fractional P-T model) was established considering direct current conductivity to analyze the dielectric properties of high-voltage XLPE submarine cables. Firstly, high-voltage XLPE submarine cable samples of different aging degrees were prepared through accelerated aging tests, and the mechanical, physicochemical, and dielectric data of each group of aged samples were measured. Subsequently, the modified fractional P-T model was applied to fit the measured dielectric curves, comparing effectiveness of the fractional P-T model before and after modification in characterizing the measured dielectric curves. Finally, through simulation, the influence of model parameters on the dielectric curves was explored, relationship was established between model parameters and insulation levels, and a quantitative study was conducted of the proposed aging characteristic parameters with the elongation at break (EAB). The research results indicate that the modified fractional P-T model can accurately fit the dielectric curves of high-voltage XLPE submarine cable samples with different degrees of aging, and the proposed aging characteristic parameters α, εa, εb, and σdc can realize the quantitative assessment of the insulation status of high-voltage XLPE submarine cables. © 2024 Editorial Department of Electric Machines and Control. All rights reserved.

引用

页码：61 / 71

页数：10

共 29 条

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