Calculation of the internal thermal resistance and ampacity of 3-core unscreened cables with fillers

Anders, G.J.; Napieralski, A.; Zamojski, W.

doi:10.1109/61.686962

Cited by 14 publications

(5 citation statements)

References 4 publications

(6 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The obtained results are in agreement with that obtained by Anders [8,10,15,17]. The obtained findings in Fig.…”

Section: Influence Of Suction Tension On the Backfill Soil Thermal Resupporting

confidence: 93%

“…Several studies have been conducted to calculate the current capacity of the cables with regard to fixed thermal conductivities of the soil which are not realistic cases [7][8][9]. Different mathematical models have been proposed by many researches to investigate the formation of drying area phenomenon around underground power cables [2][3][4][10][11][12][13][14][15]. Donazzi et al [14] investigated the use of selected soils, which have an optimised particle size as backfill materials.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improving underground power distribution capacity using artificial backfill materials

Gouda¹,

Dein

2015

IET Generation, Transmission & Distribution

View full text Add to dashboard Cite

“…The obtained results are in agreement with that obtained by Anders [8,10,15,17]. The obtained findings in Fig.…”

Section: Influence Of Suction Tension On the Backfill Soil Thermal Resupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Improving underground power distribution capacity using artificial backfill materials

Gouda¹,

Dein

2015

IET Generation, Transmission & Distribution

View full text Add to dashboard Cite

“…The calculation method for the conductor temperature in three-core cable primarily includes the analytical method [7,8], FEM [9][10][11] and the artificial intelligence algorithm [12].…”

Section: Introductionmentioning

confidence: 99%

Real-Time Temperature Estimation of Three-Core Medium-Voltage Cable Joint Based on Support Vector Regression

et al. 2018

View full text Add to dashboard Cite

Abstract:The joint is the weakest link in three-core medium-voltage power cable systems and the temperature is an essential indicator to its insulation condition. Therefore, a model to estimate the temperature inside the three-core cable joint was built based on support vector regression (SVR) with two fixed cable surface temperatures as inputs. The samples for model training were obtained from 3-D transient thermal analyses through finite element method (FEM) under different single-step currents. A temperature-rise test of 15 kV three-core cable joint was carried out and the estimated temperature based on SVR agrees well with the measured result with a maximum error of about 4 • C. Besides, the proposed model could accurately estimate the joint temperature even though the thermal conductivity of armor wrap used in thermal analysis for model training differs from its real value. The accuracies and calculation speed of the proposed model were compared with those of FEM, showing a better generality of our model. A temperature-rise test under unbalanced three-phase currents was performed and the temperature estimation errors are within 6 • C, indicating the applicability of the method. The effect of contact resistance was briefly discussed in the end. This approach helps improve cable operation and maintenance.

show abstract

“…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].…”

Section: Introductionmentioning

confidence: 99%

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

Alwan,

Jasim,

Hasan

2023

IJHT

View full text Add to dashboard Cite

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.

show abstract

Calculation of the internal thermal resistance and ampacity of 3-core unscreened cables with fillers

Cited by 14 publications

References 4 publications

Improving underground power distribution capacity using artificial backfill materials

Improving underground power distribution capacity using artificial backfill materials

Real-Time Temperature Estimation of Three-Core Medium-Voltage Cable Joint Based on Support Vector Regression

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

Contact Info

Product

Resources

About