EFFECT OF A DIELECTRIC BARRIER ON THE ELECTRIC FIELD DISTRIBUTION IN HIGH-VOLTAGE COMPOSITE INSULATION OF ELECTRIC MACHINES

Introduction. Modern high-voltage systems for composite insulation of electrical machines consist of tape glass mica paper materials (dry or pre-impregnated). The electrical characteristics of a multilayer composite insulation system are determined by both the fractional content of the individual co...

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Autores principales:	G. V. Bezprozvannych, A. N. Boyko, A. V. Roginskiy
Formato:	article
Lenguaje:	EN RU UK
Publicado:	National Technical University "Kharkiv Polytechnic Institute" 2018
Materias:	high-voltage composite insulation dielectric barrier fiberglass substrate interfacial polarization electric field distribution long-term electrical strength Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/25dd7cfa29e14954a07466375607b3ce
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spelling	oai:doaj.org-article:25dd7cfa29e14954a07466375607b3ce2021-12-02T14:54:23ZEFFECT OF A DIELECTRIC BARRIER ON THE ELECTRIC FIELD DISTRIBUTION IN HIGH-VOLTAGE COMPOSITE INSULATION OF ELECTRIC MACHINES10.20998/2074-272X.2018.6.092074-272X2309-3404https://doaj.org/article/25dd7cfa29e14954a07466375607b3ce2018-12-01T00:00:00Zhttp://eie.khpi.edu.ua/article/view/2074-272X.2018.6.09/149841https://doaj.org/toc/2074-272Xhttps://doaj.org/toc/2309-3404Introduction. Modern high-voltage systems for composite insulation of electrical machines consist of tape glass mica paper materials (dry or pre-impregnated). The electrical characteristics of a multilayer composite insulation system are determined by both the fractional content of the individual components and their electrophysical properties. Purpose. The analysis of the influence of electrophysical characteristics and thickness (fraction) of the dielectric barrier on the distribution of the electric field in the composite high-voltage insulation of electrical machines. Methodology. Simulation of surface charge accumulation at the interface between the substrate and the dielectric barrier is based on the Maxwell–Wagner theory for interfacial polarization. Practical value. The influence of the electrophysical characteristics and thickness of the dielectric barrier on the distribution of the electric field has been established. In the steady state, the electric field strength in the dielectric barrier exceeds the average value by 50 %. In the region of small transition times (up to 1 s), the relative dielectric constant of the barrier has a significant effect on the distribution of the electric field. The use of a dielectric barrier with a higher dielectric constant and fractional content in comparison with the substrate leads to an increase in electric field strength by 5 % relative to the average value in composite insulation. Experimental studies of the long-term electrical strength of glass mica-belt ribbons in the cured (thermosetting) state are consistent with the simulation results. Composite insulation based on glass fiber mica tape with a high content of the mica barrier and fiberglass of smaller thickness has (8-16) % higher values of long-term electric strength. G. V. BezprozvannychA. N. BoykoA. V. RoginskiyNational Technical University "Kharkiv Polytechnic Institute"articlehigh-voltage composite insulationdielectric barrierfiberglass substrateinterfacial polarizationelectric field distributionlong-term electrical strengthElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENRUUKElectrical engineering & Electromechanics, Iss 6, Pp 63-67 (2018)
institution	DOAJ
collection	DOAJ
language	EN RU UK
topic	high-voltage composite insulation dielectric barrier fiberglass substrate interfacial polarization electric field distribution long-term electrical strength Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	high-voltage composite insulation dielectric barrier fiberglass substrate interfacial polarization electric field distribution long-term electrical strength Electrical engineering. Electronics. Nuclear engineering TK1-9971 G. V. Bezprozvannych A. N. Boyko A. V. Roginskiy EFFECT OF A DIELECTRIC BARRIER ON THE ELECTRIC FIELD DISTRIBUTION IN HIGH-VOLTAGE COMPOSITE INSULATION OF ELECTRIC MACHINES
description	Introduction. Modern high-voltage systems for composite insulation of electrical machines consist of tape glass mica paper materials (dry or pre-impregnated). The electrical characteristics of a multilayer composite insulation system are determined by both the fractional content of the individual components and their electrophysical properties. Purpose. The analysis of the influence of electrophysical characteristics and thickness (fraction) of the dielectric barrier on the distribution of the electric field in the composite high-voltage insulation of electrical machines. Methodology. Simulation of surface charge accumulation at the interface between the substrate and the dielectric barrier is based on the Maxwell–Wagner theory for interfacial polarization. Practical value. The influence of the electrophysical characteristics and thickness of the dielectric barrier on the distribution of the electric field has been established. In the steady state, the electric field strength in the dielectric barrier exceeds the average value by 50 %. In the region of small transition times (up to 1 s), the relative dielectric constant of the barrier has a significant effect on the distribution of the electric field. The use of a dielectric barrier with a higher dielectric constant and fractional content in comparison with the substrate leads to an increase in electric field strength by 5 % relative to the average value in composite insulation. Experimental studies of the long-term electrical strength of glass mica-belt ribbons in the cured (thermosetting) state are consistent with the simulation results. Composite insulation based on glass fiber mica tape with a high content of the mica barrier and fiberglass of smaller thickness has (8-16) % higher values of long-term electric strength.
format	article
author	G. V. Bezprozvannych A. N. Boyko A. V. Roginskiy
author_facet	G. V. Bezprozvannych A. N. Boyko A. V. Roginskiy
author_sort	G. V. Bezprozvannych
title	EFFECT OF A DIELECTRIC BARRIER ON THE ELECTRIC FIELD DISTRIBUTION IN HIGH-VOLTAGE COMPOSITE INSULATION OF ELECTRIC MACHINES
title_short	EFFECT OF A DIELECTRIC BARRIER ON THE ELECTRIC FIELD DISTRIBUTION IN HIGH-VOLTAGE COMPOSITE INSULATION OF ELECTRIC MACHINES
title_full	EFFECT OF A DIELECTRIC BARRIER ON THE ELECTRIC FIELD DISTRIBUTION IN HIGH-VOLTAGE COMPOSITE INSULATION OF ELECTRIC MACHINES
title_fullStr	EFFECT OF A DIELECTRIC BARRIER ON THE ELECTRIC FIELD DISTRIBUTION IN HIGH-VOLTAGE COMPOSITE INSULATION OF ELECTRIC MACHINES
title_full_unstemmed	EFFECT OF A DIELECTRIC BARRIER ON THE ELECTRIC FIELD DISTRIBUTION IN HIGH-VOLTAGE COMPOSITE INSULATION OF ELECTRIC MACHINES
title_sort	effect of a dielectric barrier on the electric field distribution in high-voltage composite insulation of electric machines
publisher	National Technical University "Kharkiv Polytechnic Institute"
publishDate	2018
url	https://doaj.org/article/25dd7cfa29e14954a07466375607b3ce
work_keys_str_mv	AT gvbezprozvannych effectofadielectricbarrierontheelectricfielddistributioninhighvoltagecompositeinsulationofelectricmachines AT anboyko effectofadielectricbarrierontheelectricfielddistributioninhighvoltagecompositeinsulationofelectricmachines AT avroginskiy effectofadielectricbarrierontheelectricfielddistributioninhighvoltagecompositeinsulationofelectricmachines
_version_	1718389371814543360

EFFECT OF A DIELECTRIC BARRIER ON THE ELECTRIC FIELD DISTRIBUTION IN HIGH-VOLTAGE COMPOSITE INSULATION OF ELECTRIC MACHINES

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