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Potential Properties and Applications of Wires with Helical Structure in High-Voltage Overhead Power Lines and PV Systems.

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Title: Potential Properties and Applications of Wires with Helical Structure in High-Voltage Overhead Power Lines and PV Systems.
Authors: Steckiewicz, Adam1 (AUTHOR) a.steckiewicz@pb.edu.pl, Zajkowski, Maciej1,2 (AUTHOR), Jovanovic, Andrijana1,2 (AUTHOR)
Source: Energies (19961073). Nov2025, Vol. 18 Issue 22, p6008. 23p.
Subjects: Helical structure, Power transmission, Heat transfer, Electric conductivity, Electric lines, Numerical analysis, Photovoltaic power generation, Aerodynamics
Abstract: High-voltage overhead power lines consist of the non-insulated, densely packed round or trapezoidal aluminum strands supported by a reinforced core. This configuration may ensure the acceptable investment cost, mass per unit length, and aerodynamic effects caused by wind; however, the ampacity is lower than those of copper wires, which limits the power transmission. Today, it is especially important, since the peak power generation of, e.g., photovoltaics forces power lines to casually distribute high currents. To potentially improve long- and short-term capabilities of energy distribution, instead of a cylindrical wire, the helical structure was proposed. Preserving an identical core, the conductor was formed as many elongated helices wrapped around an aluminum tube. The design was meant to significantly enlarge the outer surface of the wire, improving the heat transfer of the line, which then allowed us to enhance its ampacity. The solution was investigated numerically utilizing a 3D model with the coupled electrical, heat transfer, and laminar flow analysis. Based on this, the parameters (unit weight, unit resistance, and aerodynamic drag) of such modified wires were identified. Then, at different current loadings and wind speeds, the conductors were studied and compared with the ACSS (aluminum conductor steel-supported). The optimal variants of helical wires were suggested and the results indicated that using the helical conductor makes it possible to increase the ampacity of power lines (with the same unit weight, resistance, and cross-section of the ACSS wire) by 44% at low wind speed, even up to 160% at higher temperatures. [ABSTRACT FROM AUTHOR]
Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
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  Data: Potential Properties and Applications of Wires with Helical Structure in High-Voltage Overhead Power Lines and PV Systems.
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  Data: <searchLink fieldCode="AR" term="%22Steckiewicz%2C+Adam%22">Steckiewicz, Adam</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> a.steckiewicz@pb.edu.pl</i><br /><searchLink fieldCode="AR" term="%22Zajkowski%2C+Maciej%22">Zajkowski, Maciej</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jovanovic%2C+Andrijana%22">Jovanovic, Andrijana</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="DE" term="%22Helical+structure%22">Helical structure</searchLink><br /><searchLink fieldCode="DE" term="%22Power+transmission%22">Power transmission</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+transfer%22">Heat transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+conductivity%22">Electric conductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+lines%22">Electric lines</searchLink><br /><searchLink fieldCode="DE" term="%22Numerical+analysis%22">Numerical analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Photovoltaic+power+generation%22">Photovoltaic power generation</searchLink><br /><searchLink fieldCode="DE" term="%22Aerodynamics%22">Aerodynamics</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: High-voltage overhead power lines consist of the non-insulated, densely packed round or trapezoidal aluminum strands supported by a reinforced core. This configuration may ensure the acceptable investment cost, mass per unit length, and aerodynamic effects caused by wind; however, the ampacity is lower than those of copper wires, which limits the power transmission. Today, it is especially important, since the peak power generation of, e.g., photovoltaics forces power lines to casually distribute high currents. To potentially improve long- and short-term capabilities of energy distribution, instead of a cylindrical wire, the helical structure was proposed. Preserving an identical core, the conductor was formed as many elongated helices wrapped around an aluminum tube. The design was meant to significantly enlarge the outer surface of the wire, improving the heat transfer of the line, which then allowed us to enhance its ampacity. The solution was investigated numerically utilizing a 3D model with the coupled electrical, heat transfer, and laminar flow analysis. Based on this, the parameters (unit weight, unit resistance, and aerodynamic drag) of such modified wires were identified. Then, at different current loadings and wind speeds, the conductors were studied and compared with the ACSS (aluminum conductor steel-supported). The optimal variants of helical wires were suggested and the results indicated that using the helical conductor makes it possible to increase the ampacity of power lines (with the same unit weight, resistance, and cross-section of the ACSS wire) by 44% at low wind speed, even up to 160% at higher temperatures. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/en18226008
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      – Code: eng
        Text: English
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        PageCount: 23
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      – SubjectFull: Heat transfer
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      – SubjectFull: Electric lines
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      – SubjectFull: Numerical analysis
        Type: general
      – SubjectFull: Photovoltaic power generation
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      – SubjectFull: Aerodynamics
        Type: general
    Titles:
      – TitleFull: Potential Properties and Applications of Wires with Helical Structure in High-Voltage Overhead Power Lines and PV Systems.
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              Text: Nov2025
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