EFFICIENCY OF APPLICATION OF SEMICONDUCTIVE COATINGS FOR REGULATION OF ELECTRIC FIELD IN HIGH-VOLTAGE INSULATION OF ELECTRIC MACHINES

Introduction. Intensification of competition and the desire to reduce the cost of high-voltage electric machines due to a significant increase in the electrical and thermal loads of the electrical insulation system complicate the operation of anti-corona coatings on the insulation surface of the sta...

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Autores principales:	G. V. Bezprozvannych, A. V. Roginskiy
Formato:	article
Lenguaje:	EN RU UK
Publicado:	National Technical University "Kharkiv Polytechnic Institute" 2019
Materias:	frontal part of the rod external partial discharges electric field regulation of the electric field semiconductive coating surface resistivity distribution of electric potential stability of nonlinear properties long-term electric and thermal aging Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/eb46a54f964143ecb0a6a43f7559cfcc
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spelling	oai:doaj.org-article:eb46a54f964143ecb0a6a43f7559cfcc2021-12-02T14:31:52ZEFFICIENCY OF APPLICATION OF SEMICONDUCTIVE COATINGS FOR REGULATION OF ELECTRIC FIELD IN HIGH-VOLTAGE INSULATION OF ELECTRIC MACHINES10.20998/2074-272X.2019.6.062074-272X2309-3404https://doaj.org/article/eb46a54f964143ecb0a6a43f7559cfcc2019-12-01T00:00:00Zhttp://eie.khpi.edu.ua/article/view/2074-272X.2019.6.06/187499https://doaj.org/toc/2074-272Xhttps://doaj.org/toc/2309-3404Introduction. Intensification of competition and the desire to reduce the cost of high-voltage electric machines due to a significant increase in the electrical and thermal loads of the electrical insulation system complicate the operation of anti-corona coatings on the insulation surface of the stator winding and increase the intensity of discharge processes, which significantly reduce the life of the insulation in case of failure of the coatings. Purpose. The analysis of the efficiency of alignment of the electric field along the insulation surface of the stator winding of high-voltage electric machines with semiconductor anti-corona coatings. Methodology. A method for calculating the electric potential distribution along the surface of the winding insulation during the use of semiconductive coatings providing alignment decrease the electric field and eliminating the appearance of moving discharges. The reliability of the calculations is confirmed by experimental studies of the potential distribution over the surface of the anti-corona semiconducting non-linear coating along the frontal part of the samples of the rod of the hydrogenerator for a linear voltage of 20 kV. Practical value. The proposed methodology for calculating the distribution of the electric field over the surface of the insulation and the anti-corona semiconductive coating can be applied to justify the length of the coating in the frontal part of high-voltage electrical machines depending on the electrophysical characteristics of the coating, electrical insulation, and thickness. The results of an experimental verification of the stability of the nonlinear properties of coatings during prolonged electrical and thermal aging of specially made coating samples are presented.G. V. BezprozvannychA. V. RoginskiyNational Technical University "Kharkiv Polytechnic Institute"articlefrontal part of the rodexternal partial dischargeselectric fieldregulation of the electric fieldsemiconductive coatingsurface resistivitydistribution of electric potentialstability of nonlinear propertieslong-term electric and thermal agingElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENRUUKElectrical engineering & Electromechanics, Iss 6, Pp 44-49 (2019)
institution	DOAJ
collection	DOAJ
language	EN RU UK
topic	frontal part of the rod external partial discharges electric field regulation of the electric field semiconductive coating surface resistivity distribution of electric potential stability of nonlinear properties long-term electric and thermal aging Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	frontal part of the rod external partial discharges electric field regulation of the electric field semiconductive coating surface resistivity distribution of electric potential stability of nonlinear properties long-term electric and thermal aging Electrical engineering. Electronics. Nuclear engineering TK1-9971 G. V. Bezprozvannych A. V. Roginskiy EFFICIENCY OF APPLICATION OF SEMICONDUCTIVE COATINGS FOR REGULATION OF ELECTRIC FIELD IN HIGH-VOLTAGE INSULATION OF ELECTRIC MACHINES
description	Introduction. Intensification of competition and the desire to reduce the cost of high-voltage electric machines due to a significant increase in the electrical and thermal loads of the electrical insulation system complicate the operation of anti-corona coatings on the insulation surface of the stator winding and increase the intensity of discharge processes, which significantly reduce the life of the insulation in case of failure of the coatings. Purpose. The analysis of the efficiency of alignment of the electric field along the insulation surface of the stator winding of high-voltage electric machines with semiconductor anti-corona coatings. Methodology. A method for calculating the electric potential distribution along the surface of the winding insulation during the use of semiconductive coatings providing alignment decrease the electric field and eliminating the appearance of moving discharges. The reliability of the calculations is confirmed by experimental studies of the potential distribution over the surface of the anti-corona semiconducting non-linear coating along the frontal part of the samples of the rod of the hydrogenerator for a linear voltage of 20 kV. Practical value. The proposed methodology for calculating the distribution of the electric field over the surface of the insulation and the anti-corona semiconductive coating can be applied to justify the length of the coating in the frontal part of high-voltage electrical machines depending on the electrophysical characteristics of the coating, electrical insulation, and thickness. The results of an experimental verification of the stability of the nonlinear properties of coatings during prolonged electrical and thermal aging of specially made coating samples are presented.
format	article
author	G. V. Bezprozvannych A. V. Roginskiy
author_facet	G. V. Bezprozvannych A. V. Roginskiy
author_sort	G. V. Bezprozvannych
title	EFFICIENCY OF APPLICATION OF SEMICONDUCTIVE COATINGS FOR REGULATION OF ELECTRIC FIELD IN HIGH-VOLTAGE INSULATION OF ELECTRIC MACHINES
title_short	EFFICIENCY OF APPLICATION OF SEMICONDUCTIVE COATINGS FOR REGULATION OF ELECTRIC FIELD IN HIGH-VOLTAGE INSULATION OF ELECTRIC MACHINES
title_full	EFFICIENCY OF APPLICATION OF SEMICONDUCTIVE COATINGS FOR REGULATION OF ELECTRIC FIELD IN HIGH-VOLTAGE INSULATION OF ELECTRIC MACHINES
title_fullStr	EFFICIENCY OF APPLICATION OF SEMICONDUCTIVE COATINGS FOR REGULATION OF ELECTRIC FIELD IN HIGH-VOLTAGE INSULATION OF ELECTRIC MACHINES
title_full_unstemmed	EFFICIENCY OF APPLICATION OF SEMICONDUCTIVE COATINGS FOR REGULATION OF ELECTRIC FIELD IN HIGH-VOLTAGE INSULATION OF ELECTRIC MACHINES
title_sort	efficiency of application of semiconductive coatings for regulation of electric field in high-voltage insulation of electric machines
publisher	National Technical University "Kharkiv Polytechnic Institute"
publishDate	2019
url	https://doaj.org/article/eb46a54f964143ecb0a6a43f7559cfcc
work_keys_str_mv	AT gvbezprozvannych efficiencyofapplicationofsemiconductivecoatingsforregulationofelectricfieldinhighvoltageinsulationofelectricmachines AT avroginskiy efficiencyofapplicationofsemiconductivecoatingsforregulationofelectricfieldinhighvoltageinsulationofelectricmachines
_version_	1718391224963956736

EFFICIENCY OF APPLICATION OF SEMICONDUCTIVE COATINGS FOR REGULATION OF ELECTRIC FIELD IN HIGH-VOLTAGE INSULATION OF ELECTRIC MACHINES

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