Thermal aging management of underground power cables in electricity distribution networks: a FEM-based Arrhenius analysis of the hot spot effect

Stojanović, Svetlana; Klimenta, Jelena; Panić, Marija; Klimenta, Dardan; Tasić, D; Milovanović, Miloš; Perović, Bojan

doi:10.1007/s00202-022-01689-z

Cited by 5 publications

(3 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As it was noted in Section 2.2, the temperature distribution of cable insulation is generally non-uniform along its radial axis. The cable temperature will also vary longitudinally along the cable especially when it spans a long distance with various ambient environment such as solar irradiation, wind velocity and soil moisture content [18]. The non-uniform temperature along multiple dimensions will cause degradation rates to vary with the positions within cable insulation.…”

Section: Discretization Model With Non-uniform Temperature Distributionmentioning

confidence: 99%

“…Taking the natural logarithm of the Arrhenius model which links λ to T via the IR thermal ageing activation energy E a , as formulated by ( 16), the parameters λ 0 and E a are computed by fitting (16) to the degradation rate estimates in Table 1, as shown in Figure 9a, which equal 1.82 × 10 6 (1/h) and 64 kJ, respectively. Figure 9b,c show the linear fitting of ρ 0 and ρ d against temperatures, which is used here to approximately describe the dependencies of ρ 0 and ρ d on T, as formulated by ( 17) and (18), respectively. The statistics of the linear fitting of ln(λ), ρ 0 and ρ d against T are listed in Table 2.…”

Section: Degradation Model Parameters Estimationmentioning

confidence: 99%

See 1 more Smart Citation

Insulation Resistance Degradation Models of Extruded Power Cables under Thermal Ageing

Ge,

Fan,

Given

et al. 2024

Energies

View full text Add to dashboard Cite

Insulation resistance (IR) is an essential metric indicating insulation conditions of extruded power cables. To deliver reliable IR simulation as a reference for practical cable inspection, in this paper, four IR degradation models for cross-linked polyethylene-insulated cables under thermal ageing are presented. In addition, the influences of methodologies and temperature profiles on IR simulation are evaluated. Cable cylindrical insulation is first divided into sufficiently small segments whose temperatures are simulated by jointly using a finite volume method and an artificial neural network to model the thermal ageing experiment conditions. The thermal degradation of IR is then simulated by dichotomy models that randomly sample fully degraded segments based on an overall insulation (layer) ageing condition estimation and discretization models that estimate the gradual degradation of individual segments, respectively. Furthermore, uniform and non-uniform temperature profiles are incorporated into dichotomy and discretization models, respectively, for a comparison. The IR simulation results are not only compared between different models, but also discussed around the sensitivity of IR simulation to segment sizes and degradation rates. This provides cable assessment engineers with insights into model behaviour as a reference for their selection of appropriate IR degradation models.

show abstract

Section: Discretization Model With Non-uniform Temperature Distributionmentioning

confidence: 99%

Section: Degradation Model Parameters Estimationmentioning

confidence: 99%

Insulation Resistance Degradation Models of Extruded Power Cables under Thermal Ageing

Ge,

Fan,

Given

et al. 2024

Energies

View full text Add to dashboard Cite

show abstract

“…Power cable accessory is an important device to connect the cable with the transmission line and the transformer substation [1][2][3]. During the installation and operation of XLPE (Cross-Linked Polyethylene) cable, moisture in the environment can intrude into the insulation materials and interfaces of the cable body and the accessories, leading to the insulation decline or even the insulation breakdown of the cable [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Comparison of EPDM/SIR insulation performance and mechanism analysis of the distribution cable accessories under moisture condition

Sun,

Guo,

Luo

et al. 2023

Electr Eng

View full text Add to dashboard Cite

Moisture in the insulation of distribution cable accessories is one of the important causes of insulation degradation and discharge failure of the accessories. The changes in the insulation properties of EPDM (Ethylene-Propylene-Diene Monomer) and SIR (Silicone Rubber) with the time of dampness are studied, and the mechanism of dampness is revealed by combining the surface water absorption characteristics and functional group analysis. The results show that the hydrophobicity of EPDM specimens is lower than that of SIR, resulting in the electrical properties of EPDM being signi cantly lower than those of SIR after water immersion. The resistivity and the ashover voltage of both specimens decrease signi cantly with the increase of moisture exposure time, and the decrease of EPDM is more obvious than that of SIR.The breakdown voltage of EPDM decreases by 26.6% and that of SIR decreased by 13.06%. Besides, the ashover voltage along the surface of both EPDM and SIR decreases with the increase of water immersion time, and the decreasing trend of both of them is basically the same. This work has guiding signi cance for the material selection of the cable accessories and the analysis of damp failure.

show abstract

Magnetic flux leakage, eddy current loss and temperature distribution for large scale winding in UHVDC converter transformer based on equivalent 2D axisymmetric model

Liu,

Hao,

Liao

et al. 2023

Electr Eng

View full text Add to dashboard Cite

Thermal aging management of underground power cables in electricity distribution networks: a FEM-based Arrhenius analysis of the hot spot effect

Cited by 5 publications

References 17 publications

Insulation Resistance Degradation Models of Extruded Power Cables under Thermal Ageing

Insulation Resistance Degradation Models of Extruded Power Cables under Thermal Ageing

Comparison of EPDM/SIR insulation performance and mechanism analysis of the distribution cable accessories under moisture condition

Magnetic flux leakage, eddy current loss and temperature distribution for large scale winding in UHVDC converter transformer based on equivalent 2D axisymmetric model

Contact Info

Product

Resources

About