EFFECT OF THE THICKNESS OF INSULATION OF PROTECTED WIRES OF HIGH-VOLTAGE OVERHEAD TRANSMISSION LINES TO THEIR CURRENT CARRYING CAPACITY
Introduction. The main direction of technical policy in the design, construction and technical re-equipment of transmission lines is the modernization of electrical networks and increase their energy efficiency in order to increase the throughput and reliability. Problem. Existing calculation method...
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National Technical University "Kharkiv Polytechnic Institute" and Аnatolii Pidhornyi Institute of Power Machines and Systems of NAS of Ukraine
2018
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eiekhpieduua-article-1281832018-04-18T10:13:07Z EFFECT OF THE THICKNESS OF INSULATION OF PROTECTED WIRES OF HIGH-VOLTAGE OVERHEAD TRANSMISSION LINES TO THEIR CURRENT CARRYING CAPACITY ВЛИЯНИЕ ТОЛЩИНЫ ИЗОЛЯЦИИ ЗАЩИЩЕННЫХ ПРОВОДОВ ВЫСОКОВОЛЬТНЫХ ЛЭП НА ИХ ПРОПУСКНУЮ СПОСОБНОСТЬ ПО ТОКУ Bezprozvannych, G. V. Zolotaryov, V. M. Antonets, Y. A. bare conductor protected wire cross-linked polyethylene insulation oxide insulation thermal resistance optimal insulation thickness heat balance effective heat transfer coefficient current carrying capacity 621.319 неизолированные провода защищенные провода сшитая полиэтиленовая изоляция оксидная изоляция тепловое сопротивление оптимальная толщина изоляции тепловой баланс эффективный коэффициент теплопередачи пропускная способность по току 621.319 Introduction. The main direction of technical policy in the design, construction and technical re-equipment of transmission lines is the modernization of electrical networks and increase their energy efficiency in order to increase the throughput and reliability. Problem. Existing calculation methods do not take into account the influence of insulation thickness on the long-term current load of the wires according to the values of the maximum permissible working temperature of the conductors. Purpose. The investigation of the influence of insulation thickness of the protected wires of high-voltage electric transmission lines on their current carrying capacity. Methodology. The long operating temperature of the wire when the rated load current flows is determined based on the heat balance equation. Results. A method has been developed for determining the optimum thickness of polyethylene cross linked and oxide insulation to provide the lowest thermal resistance to the heat transfer of protected wires, the use of which allows increasing the current carrying capacity by 20 % compared to bare wires. It is shown that the internal temperature drop in cross linked polyethylene insulation is an order of magnitude smaller in comparison with the oxide insulation at identical values of the dielectric loss tangent. Originality. The calculations take into account the presence on the surface of a non-insulated aluminum conductor of a natural dense film based on aluminum oxide, which protects it from further contact with air. The capacitance of a single phase conductor with insulation is determined on the basis of the calculation of the electric field in a piecewise homogeneous medium by the method of secondary sources. Разработана методика определения оптимальной толщины полиэтиленовой сшитой и оксидной изоляции для обеспечения наименьшего теплового сопротивления теплопередаче защищенных и неизолированных проводов. Обоснована применимость разработанной методики для оптимизации толщины изоляции защищенных проводов напряжением 20 кВ. Показана возможность повышения пропускной способности по току защищенных проводов на 20 % по сравнению с неизолированными проводами за счет оптимизации толщины их изоляции. Установлено, что внутренний перепад температуры в сшитой полиэтиленовой изоляции на порядок меньше в сравнении с оксидной изоляции при одинаковых значениях тангенса угла диэлектрических потерь. National Technical University "Kharkiv Polytechnic Institute" and Аnatolii Pidhornyi Institute of Power Machines and Systems of NAS of Ukraine 2018-04-10 Article Article Peer-reviewed Article application/pdf application/pdf http://eie.khpi.edu.ua/article/view/2074-272X.2018.2.07 10.20998/2074-272X.2018.2.07 Electrical Engineering & Electromechanics; No. 2 (2018); 41-46 Электротехника и Электромеханика; № 2 (2018); 41-46 Електротехніка і Електромеханіка; № 2 (2018); 41-46 2309-3404 2074-272X en uk http://eie.khpi.edu.ua/article/view/2074-272X.2018.2.07/123300 http://eie.khpi.edu.ua/article/view/2074-272X.2018.2.07/123301 Copyright (c) 2018 G. V. Bezprozvannych, V. M. Zolotaryov, Y. A. Antonets https://creativecommons.org/licenses/by-nc/4.0 |
| institution |
Electrical Engineering & Electromechanics |
| baseUrl_str |
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| datestamp_date |
2018-04-18T10:13:07Z |
| collection |
OJS |
| language |
English Ukrainian |
| topic |
bare conductor protected wire cross-linked polyethylene insulation oxide insulation thermal resistance optimal insulation thickness heat balance effective heat transfer coefficient current carrying capacity 621.319 |
| spellingShingle |
bare conductor protected wire cross-linked polyethylene insulation oxide insulation thermal resistance optimal insulation thickness heat balance effective heat transfer coefficient current carrying capacity 621.319 Bezprozvannych, G. V. Zolotaryov, V. M. Antonets, Y. A. EFFECT OF THE THICKNESS OF INSULATION OF PROTECTED WIRES OF HIGH-VOLTAGE OVERHEAD TRANSMISSION LINES TO THEIR CURRENT CARRYING CAPACITY |
| topic_facet |
bare conductor protected wire cross-linked polyethylene insulation oxide insulation thermal resistance optimal insulation thickness heat balance effective heat transfer coefficient current carrying capacity 621.319 неизолированные провода защищенные провода сшитая полиэтиленовая изоляция оксидная изоляция тепловое сопротивление оптимальная толщина изоляции тепловой баланс эффективный коэффициент теплопередачи пропускная способность по току 621.319 |
| format |
Article |
| author |
Bezprozvannych, G. V. Zolotaryov, V. M. Antonets, Y. A. |
| author_facet |
Bezprozvannych, G. V. Zolotaryov, V. M. Antonets, Y. A. |
| author_sort |
Bezprozvannych, G. V. |
| title |
EFFECT OF THE THICKNESS OF INSULATION OF PROTECTED WIRES OF HIGH-VOLTAGE OVERHEAD TRANSMISSION LINES TO THEIR CURRENT CARRYING CAPACITY |
| title_short |
EFFECT OF THE THICKNESS OF INSULATION OF PROTECTED WIRES OF HIGH-VOLTAGE OVERHEAD TRANSMISSION LINES TO THEIR CURRENT CARRYING CAPACITY |
| title_full |
EFFECT OF THE THICKNESS OF INSULATION OF PROTECTED WIRES OF HIGH-VOLTAGE OVERHEAD TRANSMISSION LINES TO THEIR CURRENT CARRYING CAPACITY |
| title_fullStr |
EFFECT OF THE THICKNESS OF INSULATION OF PROTECTED WIRES OF HIGH-VOLTAGE OVERHEAD TRANSMISSION LINES TO THEIR CURRENT CARRYING CAPACITY |
| title_full_unstemmed |
EFFECT OF THE THICKNESS OF INSULATION OF PROTECTED WIRES OF HIGH-VOLTAGE OVERHEAD TRANSMISSION LINES TO THEIR CURRENT CARRYING CAPACITY |
| title_sort |
effect of the thickness of insulation of protected wires of high-voltage overhead transmission lines to their current carrying capacity |
| title_alt |
ВЛИЯНИЕ ТОЛЩИНЫ ИЗОЛЯЦИИ ЗАЩИЩЕННЫХ ПРОВОДОВ ВЫСОКОВОЛЬТНЫХ ЛЭП НА ИХ ПРОПУСКНУЮ СПОСОБНОСТЬ ПО ТОКУ |
| description |
Introduction. The main direction of technical policy in the design, construction and technical re-equipment of transmission lines is the modernization of electrical networks and increase their energy efficiency in order to increase the throughput and reliability. Problem. Existing calculation methods do not take into account the influence of insulation thickness on the long-term current load of the wires according to the values of the maximum permissible working temperature of the conductors. Purpose. The investigation of the influence of insulation thickness of the protected wires of high-voltage electric transmission lines on their current carrying capacity. Methodology. The long operating temperature of the wire when the rated load current flows is determined based on the heat balance equation. Results. A method has been developed for determining the optimum thickness of polyethylene cross linked and oxide insulation to provide the lowest thermal resistance to the heat transfer of protected wires, the use of which allows increasing the current carrying capacity by 20 % compared to bare wires. It is shown that the internal temperature drop in cross linked polyethylene insulation is an order of magnitude smaller in comparison with the oxide insulation at identical values of the dielectric loss tangent. Originality. The calculations take into account the presence on the surface of a non-insulated aluminum conductor of a natural dense film based on aluminum oxide, which protects it from further contact with air. The capacitance of a single phase conductor with insulation is determined on the basis of the calculation of the electric field in a piecewise homogeneous medium by the method of secondary sources. |
| publisher |
National Technical University "Kharkiv Polytechnic Institute" and Аnatolii Pidhornyi Institute of Power Machines and Systems of NAS of Ukraine |
| publishDate |
2018 |
| url |
http://eie.khpi.edu.ua/article/view/2074-272X.2018.2.07 |
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2025-07-17T11:47:03Z |
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