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Heat Dissipation in Variable Underground Power Cable Beddings: Experiences from a Real Scale Field Experiment

Author

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  • Christoph Verschaffel-Drefke

    (Geothermal Science and Technology, Department of Materials and Earth Sciences, Technical University of Darmstadt, Schnittspahnstr. 9, 64287 Darmstadt, Germany
    Darmstadt Graduate School of Excellence Energy Science and Engineering, Technical University of Darmstadt, Otto-Berndt-Str. 3, 64287 Darmstadt, Germany)

  • Markus Schedel

    (Geothermal Science and Technology, Department of Materials and Earth Sciences, Technical University of Darmstadt, Schnittspahnstr. 9, 64287 Darmstadt, Germany
    Darmstadt Graduate School of Excellence Energy Science and Engineering, Technical University of Darmstadt, Otto-Berndt-Str. 3, 64287 Darmstadt, Germany)

  • Constantin Balzer

    (Darmstadt Graduate School of Excellence Energy Science and Engineering, Technical University of Darmstadt, Otto-Berndt-Str. 3, 64287 Darmstadt, Germany
    High-Voltage Laboratories, Department of Electrical Engineering and Information Technology, Technical University of Darmstadt, Fraunhoferstr. 4, 64283 Darmstadt, Germany)

  • Volker Hinrichsen

    (Darmstadt Graduate School of Excellence Energy Science and Engineering, Technical University of Darmstadt, Otto-Berndt-Str. 3, 64287 Darmstadt, Germany
    High-Voltage Laboratories, Department of Electrical Engineering and Information Technology, Technical University of Darmstadt, Fraunhoferstr. 4, 64283 Darmstadt, Germany)

  • Ingo Sass

    (Geothermal Science and Technology, Department of Materials and Earth Sciences, Technical University of Darmstadt, Schnittspahnstr. 9, 64287 Darmstadt, Germany
    Darmstadt Graduate School of Excellence Energy Science and Engineering, Technical University of Darmstadt, Otto-Berndt-Str. 3, 64287 Darmstadt, Germany)

Abstract

To prevent accelerated thermal aging or insulation faults in cable systems due to overheating, the current carrying capacity is usually limited by specific conductor temperatures. As the heat produced during the operation of underground cables has to be dissipated to the environment, the actual current carrying capacity of a power cable system is primarily dependent on the thermal properties of the surrounding porous bedding material and soil. To investigate the heat dissipation processes around buried power cables of real scale and with realistic electric loading, a field experiment consisting of a main field with various cable configurations, laid in four different bedding materials, and a side field with additional cable trenches for thermally enhanced bedding materials and protection pipe systems was planned and constructed. The experimental results present the strong influences of the different bedding materials on the maximum cable ampacity. Alongside the importance of the basic thermal properties, the influence of the bedding’s hydraulic properties, especially on the drying and rewetting effects, were observed. Furthermore, an increase in ampacity between 25% and 35% was determined for a cable system in a duct filled with an artificial grouting material compared to a common air-filled ducted system.

Suggested Citation

  • Christoph Verschaffel-Drefke & Markus Schedel & Constantin Balzer & Volker Hinrichsen & Ingo Sass, 2021. "Heat Dissipation in Variable Underground Power Cable Beddings: Experiences from a Real Scale Field Experiment," Energies, MDPI, vol. 14(21), pages 1-24, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:21:p:7189-:d:670324
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    References listed on IDEAS

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    1. Bertsch, Valentin & Hall, Margeret & Weinhardt, Christof & Fichtner, Wolf, 2016. "Public acceptance and preferences related to renewable energy and grid expansion policy: Empirical insights for Germany," Energy, Elsevier, vol. 114(C), pages 465-477.
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    3. Steinbach, Armin, 2013. "Barriers and solutions for expansion of electricity grids—the German experience," Energy Policy, Elsevier, vol. 63(C), pages 224-229.
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    Cited by:

    1. Romuald Masnicki & Janusz Mindykowski & Beata Palczynska, 2022. "Experiment-Based Study of Heat Dissipation from the Power Cable in a Casing Pipe," Energies, MDPI, vol. 15(13), pages 1-16, June.
    2. Shahbaz Ahmad & Zarghaam Haider Rizvi & Joan Chetam Christine Arp & Frank Wuttke & Vineet Tirth & Saiful Islam, 2021. "Evolution of Temperature Field around Underground Power Cable for Static and Cyclic Heating," Energies, MDPI, vol. 14(23), pages 1-19, December.
    3. Kui Liu & Renato Zagorščak & Richard J. Sandford & Oliver N. Cwikowski & Alexander Yanushkevich & Hywel R. Thomas, 2022. "Insights into the Thermal Performance of Underground High Voltage Electricity Transmission Lines through Thermo-Hydraulic Modelling," Energies, MDPI, vol. 15(23), pages 1-25, November.

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