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Insights into the Thermal Performance of Underground High Voltage Electricity Transmission Lines through Thermo-Hydraulic Modelling

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Listed:
  • Kui Liu

    (Geoenvironmental Research Centre, Cardiff School of Engineering, Cardiff University, The Queen’s Buildings, The Parade, Cardiff CF24 3AA, UK
    Institut de Radioprotection et de Sûreté Nucléaire, 92260 Fontenay-aux-Roses, France)

  • Renato Zagorščak

    (Geoenvironmental Research Centre, Cardiff School of Engineering, Cardiff University, The Queen’s Buildings, The Parade, Cardiff CF24 3AA, UK
    Quintessa Ltd., First Floor, West Wing, Videcom House, Newtown Road, Henley-on-Thames RG9 1HG, UK)

  • Richard J. Sandford

    (School of Earth and Environmental Sciences, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK)

  • Oliver N. Cwikowski

    (National Grid Electricity Transmission plc, Warwick Technology Park, Gallows Hill, Warwick CV34 6DA, UK)

  • Alexander Yanushkevich

    (National Grid Electricity Transmission plc, Warwick Technology Park, Gallows Hill, Warwick CV34 6DA, UK)

  • Hywel R. Thomas

    (Geoenvironmental Research Centre, Cardiff School of Engineering, Cardiff University, The Queen’s Buildings, The Parade, Cardiff CF24 3AA, UK)

Abstract

In this paper, a flexible numerical framework to provide thermal performance assessment for the underground buried cables, considering different geological and meteorological conditions, has been presented. Underground cables tend to retain the heat produced in the conductor, so complex coupled thermo-hydraulic response of the porous medium surrounding the cables needs to be assessed to prevent cable overheating and the associated reduction in cable capacity for carrying current. Applying a coupled thermo-hydraulic model within the developed numerical framework to conduct a health assessment on a subset of National Grid Electricity Transmission’s underground cables, this study provides novel insights into the thermal behaviour of buried circuits. The results indicate that backfill and surrounding native soil have the dominant effect on the thermal behaviour of cables, while the amount of precipitation and ambient temperature were found to have less impact on cable’s thermal behaviour. The findings strongly infer that the nature of the overloading which is undertaken in practice would have no ongoing negative impact, suggesting that more frequent or longer duration overloading regimes could be tolerated. Overall, this study demonstrates how the developed numerical framework could be harnessed to allow safe rating adjustments of buried transmission circuits.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:23:p:8897-:d:983397
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    References listed on IDEAS

    as
    1. Stanislaw Czapp & Filip Ratkowski, 2021. "Optimization of Thermal Backfill Configurations for Desired High-Voltage Power Cables Ampacity," Energies, MDPI, vol. 14(5), pages 1-14, March.
    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. Lin Yang & Weihao Qiu & Jichao Huang & Yanpeng Hao & Mingli Fu & Shuai Hou & Licheng Li, 2018. "Comparison of Conductor-Temperature Calculations Based on Different Radial-Position-Temperature Detections for High-Voltage Power Cable," Energies, MDPI, vol. 11(1), pages 1-17, January.
    4. 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.
    Full references (including those not matched with items on IDEAS)

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