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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Autores principales:	G. V. Bezprozvannych, V. M. Zolotaryov, Y. A. Antonets
Formato:	article
Lenguaje:	EN RU UK
Publicado:	National Technical University "Kharkiv Polytechnic Institute" 2018
Materias:	bare conductor protected wire cross-linked polyethylene insulation oxide insulation thermal resistance optimal insulation thickness heat balance effective heat transfer coefficient current carrying capacity Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/b8257d2b09bd4e518af29af5990c5621
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spelling	oai:doaj.org-article:b8257d2b09bd4e518af29af5990c56212021-12-02T17:50:51ZEFFECT OF THE THICKNESS OF INSULATION OF PROTECTED WIRES OF HIGH-VOLTAGE OVERHEAD TRANSMISSION LINES TO THEIR CURRENT CARRYING CAPACITY10.20998/2074-272X.2018.2.072074-272X2309-3404https://doaj.org/article/b8257d2b09bd4e518af29af5990c56212018-04-01T00:00:00Zhttp://eie.khpi.edu.ua/article/view/2074-272X.2018.2.07/123300https://doaj.org/toc/2074-272Xhttps://doaj.org/toc/2309-3404Introduction. 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.G. V. BezprozvannychV. M. ZolotaryovY. A. AntonetsNational Technical University "Kharkiv Polytechnic Institute"articlebare conductorprotected wirecross-linked polyethylene insulationoxide insulationthermal resistanceoptimal insulation thicknessheat balanceeffective heat transfer coefficientcurrent carrying capacityElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENRUUKElectrical engineering & Electromechanics, Iss 2, Pp 41-46 (2018)
institution	DOAJ
collection	DOAJ
language	EN RU UK
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 Electrical engineering. Electronics. Nuclear engineering TK1-9971
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 Electrical engineering. Electronics. Nuclear engineering TK1-9971 G. V. Bezprozvannych V. M. Zolotaryov Y. A. Antonets EFFECT OF THE THICKNESS OF INSULATION OF PROTECTED WIRES OF HIGH-VOLTAGE OVERHEAD TRANSMISSION LINES TO THEIR CURRENT CARRYING CAPACITY
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.
format	article
author	G. V. Bezprozvannych V. M. Zolotaryov Y. A. Antonets
author_facet	G. V. Bezprozvannych V. M. Zolotaryov Y. A. Antonets
author_sort	G. V. Bezprozvannych
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
publisher	National Technical University "Kharkiv Polytechnic Institute"
publishDate	2018
url	https://doaj.org/article/b8257d2b09bd4e518af29af5990c5621
work_keys_str_mv	AT gvbezprozvannych effectofthethicknessofinsulationofprotectedwiresofhighvoltageoverheadtransmissionlinestotheircurrentcarryingcapacity AT vmzolotaryov effectofthethicknessofinsulationofprotectedwiresofhighvoltageoverheadtransmissionlinestotheircurrentcarryingcapacity AT yaantonets effectofthethicknessofinsulationofprotectedwiresofhighvoltageoverheadtransmissionlinestotheircurrentcarryingcapacity
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EFFECT OF THE THICKNESS OF INSULATION OF PROTECTED WIRES OF HIGH-VOLTAGE OVERHEAD TRANSMISSION LINES TO THEIR CURRENT CARRYING CAPACITY

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