Abstract
An original simplified mathematical model is proposed that describes the distribution of a harmonic electromagnetic field at a commercial frequency in steel-reinforced high-voltage cables with helically stranded single-layer winding. In the framework of the idealized physical concepts on which the proposed model is based, stranded conductors are treated as an anisotropic conducting layer. It is shown that taking into account the helical twist of conductors leads to the appearance of an axial magnetic field, the presence of which can significantly influence the level of ac losses. The model has been used to calculate the dependence of the internal impedance on the magnetic permeability of the steel core for commercial AS-70 grade steel-reinforced stranded aluminum cable. The results are compared to those obtained using a hollow cylinder model and full-scale numerical calculations using the finite element method.
Similar content being viewed by others
References
M. M. Saha, J. J. Izykowski, and E. Rosolowski, Fault Location on Power Networks (Springer, 2010).
M. S. Awad, IJES 2(2), 210 (2012).
M. Kezunovic, IEEE Trans. Smart Grid 2(1), 11 (2011).
GOST 839-80 (Russian State Standard). Wires noninsulated for overhead electric power transmission lines.
H. W. Dommel et al., EMTP Theory Book (BPA Contract, 1986).
A. E. Kennelly, F. A. Laws, and P. H. Pierce, AIEE Trans. 34(2), 1953 (1915).
V. T. Morgan, IEEE Trans. Power Delivery 28(3), 1252 (2013).
J. S. Barrett, O. Nigol, C. J. Fehervari, and R. D. Findlay, IEEE Trans. Power Delivery 1(2), 198 (1986).
W. J. Carr, Jr., J. Appl. Phys. 45(2), 929 (1974).
L. D. Landau and E. M. Lifshitz, Course of Theoretical Physics, Vol. 6: Electrodynamics of Continuous Media, 2nd ed. (Nauka, Moscow, 1982; Pergamon Press, New York, 1984).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © A.G. Merkushev, I.A. Elagin, 2015, published in Pis’ma v Zhurnal Tekhnicheskoi Fiziki, 2015, Vol. 41, No. 8, pp. 95–102.
Rights and permissions
About this article
Cite this article
Merkushev, A.G., Elagin, I.A. Internal impedance of steel-reinforced helically stranded conductors at commercial frequency. Tech. Phys. Lett. 41, 401–404 (2015). https://doi.org/10.1134/S1063785015040288
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1063785015040288