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Sequence Impedances of Land Single-Core Insulated Cables: Direct Formulae and Multiconductor Cell Analyses Compared with Measurements

Author

Listed:
  • Roberto Benato

    (Department of Industrial Engineering, University of Padova, 35131 Padova, Italy)

  • Sebastian Dambone Sessa

    (Department of Industrial Engineering, University of Padova, 35131 Padova, Italy)

  • Michele Poli

    (Terna, 00156 Rome, Italy)

  • Francesco Sanniti

    (Department of Industrial Engineering, University of Padova, 35131 Padova, Italy)

Abstract

The paper deals with the sequence impedances (positive/negative and zero sequences) of high- and extra-high-voltage land single-core insulated cables. In particular, it presents the comparisons between sequence impedance measurements and computations. The computations of the sequence impedances are carried out by means of the most important international normative and council references (IEC/Cigré) and of multiconductor cell analysis which is a consolidated and powerful tool developed by University of Padova in order to analyse power frequency regimes of multiconductor asymmetric power systems. The comparisons are presented with reference to four high- and extra-high voltage insulated cables, even if the available ones are much higher: however, the conclusions derived from these four reference cases are general and can be useful for transmission system operators and for power electric system engineers involved in insulated cables. The paper demonstrates, for the first time in technical literature, that direct formulae cannot correctly evaluate the sequence impedances of installed single-core land cable systems. Extensive on-field measurement campaigns have served to this purpose.

Suggested Citation

  • Roberto Benato & Sebastian Dambone Sessa & Michele Poli & Francesco Sanniti, 2020. "Sequence Impedances of Land Single-Core Insulated Cables: Direct Formulae and Multiconductor Cell Analyses Compared with Measurements," Energies, MDPI, vol. 13(5), pages 1-16, March.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:5:p:1084-:d:326954
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    References listed on IDEAS

    as
    1. Roberto Benato & Sebastian Dambone Sessa & Fabio Guglielmi & Ertugrul Partal & Nasser Tleis, 2014. "Ground Return Current Behaviour in High Voltage Alternating Current Insulated Cables," Energies, MDPI, vol. 7(12), pages 1-16, December.
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