Influence of temperature and frequency on leakage current of XLPE cable insulation

Du, Yakun; Geng, Pulong; Song, Jiancheng; Tian, Mingliang; Pang, Dan

doi:10.1109/ichve.2016.7800648

Cited by 7 publications

(3 citation statements)

References 5 publications

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“…Many articles have described the effect of various factors on the electrical conductivity γ of cross-linked polyethylene [1,[4][5][6][7][9][10][11][12]18,. These factors include electric field stress, percentage of nanoparticles (most commonly Al 2 O 3 ), distance from the high-voltage conductor, temperature, aging time, degassing time, frequency, and insulation thickness.…”

Section: Introductionmentioning

confidence: 99%

Electric Field Distribution and Dielectric Losses in XLPE Insulation and Semiconductor Screens of High-Voltage Cables

Nadolny

2022

Energies

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This article presents the electric field distribution E and dielectric losses ΔPdiel. in the insulation system of high-voltage cables. Such a system consists of inner and outer semiconductor screens and XLPE insulation. The aim of this study was to compare the values of E and ΔPdiel. between semiconductor screens and XLPE insulation. The objects of the research were high-voltage cables of 110 kV, 220 kV, 400 kV, and 500 kV. The geometrical dimensions of the cables, especially the radii of individual layers of insulation, as well as the electrical properties of the screens and XLPE, were taken from the literature. Semiconductor screens and XLPE insulation were treated as a system of three concentric cylinders. When determining the electric field distribution, both the electrical permittivity and electrical conductivity, which, in the case of semiconductor screens, play important roles, were taken into account. The obtained results prove that both the electric field distribution E and dielectric losses Pdiel. are significantly larger in XLPE insulation than in semiconductor screens. The intensity E in XLPE insulation is about four orders of magnitude greater than the intensity in semiconductor screens. Dielectric losses ΔPdiel. in XLPE insulation are about eight orders of magnitude greater than the losses occurring in semiconductor screens.

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Section: Introductionmentioning

confidence: 99%

Electric Field Distribution and Dielectric Losses in XLPE Insulation and Semiconductor Screens of High-Voltage Cables

Nadolny

2022

Energies

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“…But the research foundation of this paper is low density polyethylene, not XLPE. The influence of temperature and frequency on the leakage current of cable is studied [15]. With the model simulation and sample test, the effects of applied voltage and temperature on DC partial discharge repetition rate characteristics of XLPE cable are studied [16].…”

Section: Introductionmentioning

confidence: 99%

Application of multi‐source information fusion based on D‐S evidence theory in insulation defect identification of DC XLPE cable

Huang

et al. 2021

High Voltage

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During the installation and laying process of cross-linked polyethylene (XLPE) cable, it is difficult to avoid the influence of external harsh environment, which leads to insulation deterioration and failure. The partial discharge and leakage current play an important role in formation mechanism, characteristic law and identification technology of DC XLPE cable defect. However, the defect identification accuracy of single source data is limited. The correlation between partial discharge and leakage current of typical defect is analysed here. Based on the shape characteristic parameters of typical DC partial discharge spectrum and the energy characteristic parameters of leakage current wavelet decomposition node, a weighted Dempster-Shafer (D-S) evidence theory is used to fuse and identify different information sources. The results show that the classification rate of the proposed method can reach 88%, which can effectively identify insulation defects.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…On the other hand, it's easy to produce the electric spark and cause the major disasters in the hazard gas environment, such as gas explosion, gas combustion etc., which will directly threaten the production safety of industrial and mining enterprises. 3,4 According to the theory of dielectric physics, the AC leakage current of XLPE cable is closely related to its relaxation polarization. Many scholars have done a lot of research on the dielectric properties of XLPE.…”

Section: Introductionmentioning

confidence: 99%

Influence of thermal aging on AC leakage current in XLPE insulation

et al. 2018

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Research on aging parameters of XLPE cable based on isothermal relaxation current AIP Advances 8, 075323 (2018) Cross-linked polyethylene (XLPE) has been widely used as cable insulation material because of its excellent dielectric properties, thermal stability and solvent resistance. To understand the influence of thermal aging on AC leakage current in XLPE insulation, all XLPE specimens were aged in oven in temperature range from 120 • C to 150 • C, and a series of tests were conducted on these XLPE specimens in different aging stages to measure the characteristic parameters, such as complex permittivity, leakage current and complex dielectric modulus. In the experiments, the effects of thermal aging, temperature and frequency on the AC leakage current in XLPE insulation were studied by analyzing complex dielectric constant and dielectric relaxation modulus spectrum, the change of relaxation peak and activation energy. It has been found that the active part of leakage current increases sharply with the increase of aging degree, and the test temperature and frequency have an influence on AC leakage current but the influence of test temperature is mainly reflected in the low frequency region. In addition, it has been shown by the experiments that the reactive part of leakage current exhibits a strong frequency dependent characteristic in the testing frequency range from 10 -2 Hz to 10 5 Hz, but the influence of test temperature and thermal aging on it is relatively small. © 2018 Author (s)

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Influence of temperature and frequency on leakage current of XLPE cable insulation

Cited by 7 publications

References 5 publications

Electric Field Distribution and Dielectric Losses in XLPE Insulation and Semiconductor Screens of High-Voltage Cables

Electric Field Distribution and Dielectric Losses in XLPE Insulation and Semiconductor Screens of High-Voltage Cables

Application of multi‐source information fusion based on D‐S evidence theory in insulation defect identification of DC XLPE cable

Influence of thermal aging on AC leakage current in XLPE insulation

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