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Calculation of the overhead transmission line conductor temperature in real operating conditions

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Abstract

The integration of fluctuating renewable sources, load growth and aging of the current power system is the major reasons for the development of the electric power engineering. Transmission lines are recently facing new technical and economic challenges. The immediate utilization of advanced technologies and modern methods could solve these issues. This study deals with the transmission and distribution of electrical energy with orientation on the calculation of operating temperature on the conductor of transmission line, which is under actual current load. The load of the transmission line is limited with allowable operating temperature. The operating temperature should not exceed the allowable operating temperature because the conductors of the transmission line have mechanical limit from the standpoint of deflection of conductors. The operating temperature as well as operating conditions of the conductor is determined by the type and material of the ACSR conductor. This article aims to propose the suitable calculation methods of the operating temperature of the overhead transmission line conductor in real operating conditions (external weather influences, current loading and corona effect). The originality of this proposed method (by differential equation) lies in considering corona effect. This improves the accuracy of the calculation of the operating temperature of the conductor under real conditions. In this article, the calculations are compared according to methodology of differential equation and methodology described in CIGRE Technical Brochure 601—guide for thermal rating calculations of overhead lines. The methodology of differential equation counts with or without losses by corona. The article also compares these methods of operating temperature during days in various different weather conditions like environment temperature, solar irradiance, wind speed and direction. It was found that under the action of the corona, the temperature of the conductor increases to a small extent.

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Acknowledgements

This work was supported by the Scientific Grant Agency of the Ministry of Education, Science, Research and Sport of the Slovak Republic and the Slovak Academy of Sciences under the contract VEGA No. 1/0372/18 and by Slovak Research and Development Agency under the contract APVV-19-0576.

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Authors and Affiliations

  1. Department of Electric Power Engineering, Faculty of Electrical Engineering and Informatics, Technical University of Košice, Letná 9, 042 00, Košice, Slovak Republic

    Ľubomír Beňa, Vladimír Gáll, Martin Kanálik, Michal Kolcun, Anastázia Margitová, Alexander Mészáros & Jakub Urbanský

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  1. Ľubomír Beňa
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  2. Vladimír Gáll
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  7. Jakub Urbanský
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Correspondence to Ľubomír Beňa.

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Beňa, Ľ., Gáll, V., Kanálik, M. et al. Calculation of the overhead transmission line conductor temperature in real operating conditions. Electr Eng 103, 769–780 (2021). https://doi.org/10.1007/s00202-020-01107-2

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  • DOI: https://doi.org/10.1007/s00202-020-01107-2

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