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

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

doi:10.1109/61.772307

Cited by 27 publications

(25 citation statements)

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“…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

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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.

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“…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

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“…Screened cores are considered, while the difference between the material of fillers and that of the insulation of phase cores is addressed. However, the assumption of isothermal screen surfaces is additionally made in [6], which is questionable, as the present paper demonstrates.…”

Section: A Scetm Adopted By Iec: Thermal Resistancesmentioning

confidence: 79%

“…Cable geometries closer to that of SL-type have been also analysed by Anders in [6]. Screened cores are considered, while the difference between the material of fillers and that of the insulation of phase cores is addressed.…”

Section: A Scetm Adopted By Iec: Thermal Resistancesmentioning

confidence: 99%

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Review of the Accuracy of Single Core Equivalent Thermal Model for Offshore Wind Farm Cables

Chatzipetros

Pilgrim

2018

IEEE Trans. Power Delivery

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“…Several approaches have been adopted to establish current ratings of buried cables based on constant values of soil thermal conductivities [4][5][6][7]. Mathematical models are suggested by many researches to study the drying out phenomenon around underground power cables [8][9][10][11][12][13][14]. In this paper de-rating factor for underground power cables taking dry zone formation into account are calculated depending on IEC 60287-1-3 [1].…”

Section: Introductionmentioning

confidence: 99%

Effect of Dry Zone Formation around Underground Power Cables on Their Ratings

Gouda¹,

Dein²,

Amer³

2009

International Journal of Emerging Electric Power Systems

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As it is known, there are many factors affecting underground power distribution cables' loadings such as ambient temperature, cable depth laying, number of cable parallel circuits and thermal resistivity of the soil. One important factor usually ignored is the formation of dry zones around the underground power cables due to cable loading. Dry zones usually form around underground power cables under loading condition due to the migration of soil moisture content. In this paper the effect of dry zone formation on the underground power cables ampacity is investigated. De-rating factor for the formation of dry zone around underground power cables is suggested and calculated for different types of natural backfill soils. IEC 60287-1-3 is taken as reference. Experimental work is done to study the dry zone phenomena of each type of soil.

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

Cited by 27 publications

References 1 publication

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

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

Review of the Accuracy of Single Core Equivalent Thermal Model for Offshore Wind Farm Cables

Effect of Dry Zone Formation around Underground Power Cables on Their Ratings

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