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Optimization of Thermal Backfill Configurations for Desired High-Voltage Power Cables Ampacity

1
Faculty of Electrical and Control Engineering, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland
2
Research and Development Centre, Eltel Networks Energetyka SA, Gutkowo 81D, 11-041 Olsztyn, Poland
*
Author to whom correspondence should be addressed.
Academic Editor: Pietro Romano
Energies 2021, 14(5), 1452; https://doi.org/10.3390/en14051452
Received: 28 January 2021 / Revised: 19 February 2021 / Accepted: 3 March 2021 / Published: 7 March 2021
(This article belongs to the Special Issue MV and HV Transmission Lines)
The ampacity of high-voltage power cables depends, among others, on their core cross-sectional area as well as thermal resistivity of the thermal backfill surrounding the cables. The cross-sectional area of the power cables’ core is selected according to the expected power to be transferred via the cable system. Usually, the higher the power transfer required, the higher the cross-sectional area of the core. However, the cost of high-voltage power cables is relatively high and strictly depends on the dimensions of the core. Therefore, from the economic point of view, it is interesting to focus on the improvement of the thermal condition around the cables, by changing the dimension of the thermal backfill, instead of increasing the power cables’ core cross-sectional area. In practice, it is important to find the optimal dimensions of both cable core and thermal backfill to achieve the economically attractive solution of the power cable transfer system. This paper presents a mathematical approach to the power-cable system design, which enables selecting the cost-optimal cross-section of a power cable core depending on the dimensions of the thermal backfill. The proposal herein allows us to indicate the condition in which it is advantageous to increase the core cross-sectional area or to expand the dimension of the backfill. In this approach, the optimal backfill geometry can also be evaluated. The investment costs of the 110 kV power cable system with the core cross-sectional areas consecutively equal to 630, 800 and 1000 mm2 have been compared. View Full-Text
Keywords: high-voltage power cables; ampacity; modeling; economic optimization high-voltage power cables; ampacity; modeling; economic optimization
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MDPI and ACS Style

Czapp, S.; Ratkowski, F. Optimization of Thermal Backfill Configurations for Desired High-Voltage Power Cables Ampacity. Energies 2021, 14, 1452. https://doi.org/10.3390/en14051452

AMA Style

Czapp S, Ratkowski F. Optimization of Thermal Backfill Configurations for Desired High-Voltage Power Cables Ampacity. Energies. 2021; 14(5):1452. https://doi.org/10.3390/en14051452

Chicago/Turabian Style

Czapp, Stanislaw; Ratkowski, Filip. 2021. "Optimization of Thermal Backfill Configurations for Desired High-Voltage Power Cables Ampacity" Energies 14, no. 5: 1452. https://doi.org/10.3390/en14051452

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