New Approach to Ampacity Evaluation of Cables in Ducts Using Finite Elemet Technique

Anders, G.J.; Chaaban,; Bedard,; Ganton,

doi:10.1109/tpwrd.1987.4308208

Cited by 38 publications

(1 citation statement)

References 5 publications

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“…Many approaches have been proposed to calculate the underground power cables ratings, depending on a constant value of the soil thermal conductivity [1][2][3][4]. Mathematical models also were adopted by many researchers to investigate the problem of the dry areas around buried cables according to studies [5][6][7][8][9][10][11]. Some researchers described use both silt, sand, as well the cement and water as backfill material for improving the current capacity in service [12].…”

Section: Introductionmentioning

confidence: 99%

Derating Factors for Underground Power Cables Ampacity in Extreme Environmental Conditions: A Comparative Study

Alwan,

Jasim,

Hasan

2023

IJHT

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In the field of power transmission, underground cables are subjected to various factors that influence their load capacity. One such significant factor, often overlooked, is the extreme environmental conditions prevalent in certain geographical regions. This study particularly focuses on regions where summer temperatures exceed 50℃ and the soil, due to excessive dryness, exhibits high thermal resistivity. The current study explores the impact of these harsh environmental conditions on the current-carrying capacity (ampacity) of underground power cables. A derating factor for dry zone formation around these cables has been proposed, calculated for various types of native soil. The standard IEC-60287 has been adhered to as a reference for these calculations. The software ANSYS has been employed to compute the temperature distribution around the cables in different types of soil, using relevant experimental data. The results indicate that the formation of dry regions in the soil begins at differing temperatures and rates depending on the soil's composition. This study thus underscores the critical role of environmental factors and soil conditions in determining the ampacity of underground power cables. It also highlights the necessity of incorporating these factors into design considerations for optimal cable performance.

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Section: Introductionmentioning

confidence: 99%

Derating Factors for Underground Power Cables Ampacity in Extreme Environmental Conditions: A Comparative Study

Alwan,

Jasim,

Hasan

2023

IJHT

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Calculation of the ampacity of high voltage cables by accounting for radiation and solar heating effects using FEM

Nahman

Tanaskovic²

2011

Int. Trans. Electr. Energ. Syst.

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SUMMARY The paper presents a finite‐element model for the evaluation of the ampacity of an underground 110‐kV three‐phase system of cables in normal operation and in case of emergency. The proposed model takes the effects of convection, radiation, and solar heating at the trench surface into account, which enhances the previous approaches. The calculations performed have shown that these phenomena affect the heating of cables and that the IEC approach that treats the trench surface as an isothermal plane at ambient temperature, widely used in practice, might underestimate the ampacity of cables in certain cases. The model considers in detail the shape and construction of the cable trench, and the thermal properties of backfilling materials and concrete and asphalt covers including the effects of the drying out of soil. The effects of various approximations have been also investigated. The model has been applied to a real life example, and the calculation results have been compared to some experimental data. Copyright © 2011 John Wiley & Sons, Ltd.

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Coupled magneto-thermal field computation in three-phase gas insulated cables

Hatziathanassiou

Labridis

1993

Archiv f. Elektrotechnik

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New Approach to Ampacity Evaluation of Cables in Ducts Using Finite Elemet Technique

Cited by 38 publications

References 5 publications

Derating Factors for Underground Power Cables Ampacity in Extreme Environmental Conditions: A Comparative Study

Derating Factors for Underground Power Cables Ampacity in Extreme Environmental Conditions: A Comparative Study

Calculation of the ampacity of high voltage cables by accounting for radiation and solar heating effects using FEM

Coupled magneto-thermal field computation in three-phase gas insulated cables

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