Calculation of the overhead transmission line conductor temperature in real operating conditions
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ORIGINAL PAPER
Calculation of the overhead transmission line conductor temperature in real operating conditions ˇ Lubomír Bena ˇ 1 · Vladimír Gáll1 · Martin Kanálik1 · Michal Kolcun1 · Anastázia Margitová1 · Alexander Mészáros1 · Jakub Urbanský1 Received: 30 March 2020 / Accepted: 7 September 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
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. Keywords Transmission line · ACSR conductor · CIGRE Technical Brochure 601 · CIGRE Technical Brochure 207 · Differential equation · Operating temperature · Weather conditions
1 Introduction Transmission lines represent one of the six major components of the power system. Transmission lines operate at high voltages and their parameters must meet certain limit requirements in order to ensure safe and reliable operation [1]. Energy technologies for transmission of electric energy, the transmission loss and economy of transmission lines represent the key issues to take into account. Consid-
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ˇ Lubomír Beˇna [email protected] Department of Electric Power Engine
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