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Analysis Method of Operating Characteristics and Optimal Arrangement of 500 KV Homopolar Parallel Cables.

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Title: Analysis Method of Operating Characteristics and Optimal Arrangement of 500 KV Homopolar Parallel Cables.
Authors: Chen, Guoyan1 (AUTHOR) 15549@hqu.edu.cn, Zhu, Min1 (AUTHOR), Shu, Haisheng1 (AUTHOR), Chi, Jian1 (AUTHOR), Chen, Wencong1 (AUTHOR)
Source: Energies (19961073). May2026, Vol. 19 Issue 9, p2145. 23p.
Subject Terms: *Impedance matrices, *Analytic hierarchy process, *Equivalent electric circuits, *Electric cables, *Eddy currents (Electric)
Abstract: The normal operational characteristics of power cables are a crucial foundation for developing their protection devices. To analyze the current and voltage characteristics of parallel cable lines, the parameter matrix of the phase-aligned parallel cable lines is first established based on Carson's formula. The metal sheath is treated as a general line, considering its self-inductance and mutual inductance with the core loop, and its sheath circulating current is calculated. Then, the relationship between line voltage and current is established, and the effect of the sheath circulating current is equivalently incorporated into the line's phase impedance matrix. A π-type equivalent circuit of the cable line is established, from which the operational parameters of the phase-aligned parallel cables are calculated. Indicators measuring the operational characteristics of phase-aligned parallel operation—sheath circulating current, imbalance, carrying capacity, and voltage deviation—are introduced, and the optimal arrangement is determined using the analytic hierarchy process. This study integrates Carson's formula for impedance modeling and fuzzy AHP for multi-criteria optimization, addressing gaps in single-indicator approaches. The proposed method identifies the three-phase vertical layout as optimal, improving ampacity by 10% and reducing sheath circulating current by 28%, offering direct guidance for 500 kV cable projects. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 193716041
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  Label: Title
  Group: Ti
  Data: Analysis Method of Operating Characteristics and Optimal Arrangement of 500 KV Homopolar Parallel Cables.
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  Data: <searchLink fieldCode="AR" term="%22Chen%2C+Guoyan%22">Chen, Guoyan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> 15549@hqu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zhu%2C+Min%22">Zhu, Min</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shu%2C+Haisheng%22">Shu, Haisheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chi%2C+Jian%22">Chi, Jian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Wencong%22">Chen, Wencong</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. May2026, Vol. 19 Issue 9, p2145. 23p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Impedance+matrices%22">Impedance matrices</searchLink><br />*<searchLink fieldCode="DE" term="%22Analytic+hierarchy+process%22">Analytic hierarchy process</searchLink><br />*<searchLink fieldCode="DE" term="%22Equivalent+electric+circuits%22">Equivalent electric circuits</searchLink><br />*<searchLink fieldCode="DE" term="%22Electric+cables%22">Electric cables</searchLink><br />*<searchLink fieldCode="DE" term="%22Eddy+currents+%28Electric%29%22">Eddy currents (Electric)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The normal operational characteristics of power cables are a crucial foundation for developing their protection devices. To analyze the current and voltage characteristics of parallel cable lines, the parameter matrix of the phase-aligned parallel cable lines is first established based on Carson's formula. The metal sheath is treated as a general line, considering its self-inductance and mutual inductance with the core loop, and its sheath circulating current is calculated. Then, the relationship between line voltage and current is established, and the effect of the sheath circulating current is equivalently incorporated into the line's phase impedance matrix. A π-type equivalent circuit of the cable line is established, from which the operational parameters of the phase-aligned parallel cables are calculated. Indicators measuring the operational characteristics of phase-aligned parallel operation—sheath circulating current, imbalance, carrying capacity, and voltage deviation—are introduced, and the optimal arrangement is determined using the analytic hierarchy process. This study integrates Carson's formula for impedance modeling and fuzzy AHP for multi-criteria optimization, addressing gaps in single-indicator approaches. The proposed method identifies the three-phase vertical layout as optimal, improving ampacity by 10% and reducing sheath circulating current by 28%, offering direct guidance for 500 kV cable projects. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.3390/en19092145
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
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        PageCount: 23
        StartPage: 2145
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      – SubjectFull: Impedance matrices
        Type: general
      – SubjectFull: Analytic hierarchy process
        Type: general
      – SubjectFull: Equivalent electric circuits
        Type: general
      – SubjectFull: Electric cables
        Type: general
      – SubjectFull: Eddy currents (Electric)
        Type: general
    Titles:
      – TitleFull: Analysis Method of Operating Characteristics and Optimal Arrangement of 500 KV Homopolar Parallel Cables.
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            NameFull: Chen, Guoyan
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            NameFull: Zhu, Min
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            NameFull: Shu, Haisheng
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            NameFull: Chi, Jian
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            NameFull: Chen, Wencong
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          Dates:
            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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              Value: 19961073
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              Value: 19
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              Value: 9
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            – TitleFull: Energies (19961073)
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