Reasoning of additional diagnostic parameters for electric insulation diagnostics by absorption methods
The aim of this work is to analyze the inadequacies of the diagnostic parameters, in particular the absorption and polarization coefficients, which are manifested in their integral character and dependence on the ratio of values of several elements of the equivalent scheme of insulation replacement....
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| Date: | 2021 |
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| Language: | English Ukrainian |
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National Technical University "Kharkiv Polytechnic Institute" and Аnatolii Pidhornyi Institute of Power Machines and Systems of NAS of Ukraine
2021
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| Online Access: | http://eie.khpi.edu.ua/article/view/241239 |
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| Journal Title: | Electrical Engineering & Electromechanics |
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Electrical Engineering & Electromechanics| id |
eiekhpieduua-article-241239 |
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Electrical Engineering & Electromechanics |
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2021-12-03T08:03:07Z |
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English Ukrainian |
| topic |
non-destructive insulation diagnostics absorption methods of insulation diagnostics diagnostic parameters of insulation dielectric absorption ratio absorption index polarization index |
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non-destructive insulation diagnostics absorption methods of insulation diagnostics diagnostic parameters of insulation dielectric absorption ratio absorption index polarization index Kyrylenko, V.M. Kyrylenko, K.V. Budko, M.O. Denysiuk, P.L. Reasoning of additional diagnostic parameters for electric insulation diagnostics by absorption methods |
| topic_facet |
non-destructive insulation diagnostics absorption methods of insulation diagnostics diagnostic parameters of insulation dielectric absorption ratio absorption index polarization index неруйнівні методи діагностування електричної ізоляції абсорбційні методи діагностування ізоляції діагностичні параметри ізоляції ємнісний і омічний коефіцієнти абсорбції коефіцієнти абсорбції і поляризації |
| format |
Article |
| author |
Kyrylenko, V.M. Kyrylenko, K.V. Budko, M.O. Denysiuk, P.L. |
| author_facet |
Kyrylenko, V.M. Kyrylenko, K.V. Budko, M.O. Denysiuk, P.L. |
| author_sort |
Kyrylenko, V.M. |
| title |
Reasoning of additional diagnostic parameters for electric insulation diagnostics by absorption methods |
| title_short |
Reasoning of additional diagnostic parameters for electric insulation diagnostics by absorption methods |
| title_full |
Reasoning of additional diagnostic parameters for electric insulation diagnostics by absorption methods |
| title_fullStr |
Reasoning of additional diagnostic parameters for electric insulation diagnostics by absorption methods |
| title_full_unstemmed |
Reasoning of additional diagnostic parameters for electric insulation diagnostics by absorption methods |
| title_sort |
reasoning of additional diagnostic parameters for electric insulation diagnostics by absorption methods |
| title_alt |
Обґрунтування додаткових діагностичних параметрів для оцінки стану електричної ізоляції абсорбційними методами |
| description |
The aim of this work is to analyze the inadequacies of the diagnostic parameters, in particular the absorption and polarization coefficients, which are manifested in their integral character and dependence on the ratio of values of several elements of the equivalent scheme of insulation replacement. This article contains the results of theoretical investigation of the extremе nature of the absorption diagnostic parameters, which leads to unambiguity of the diagnostics procedure. The ways of partial adjustment of this unambiguity have been proposed. Methodology. To determine the extremality of the absorption coefficients depending on the absorption time, absorption capacity and resistance, as well as the leakage resistance, the usual method of investigating the functions was used, detailed calculations have been obtained by using MATLAB software. Results. Has been shown that the ambiguity of diagnostic results is caused by the contradiction of the integral character of the diagnostic parameters and the local character of the isolation failures, in particular breakdown, by ambiguous dependence of the diagnostic parameters on the values of the elements of the insulation replacement scheme and the extremal nature of the diagnostic parameters. Based on the general expression describing all currently used absorption coefficients, it is shown that they all have an extremum, the value of which depends on the parameters of the insulation substitution scheme and the time interval between the measurements of the absorption current. The dependence of the extreme value of the absorption and polarization coefficients on the parameters of the insulation substitution scheme has been established. Has been shown that to eliminate the ambiguity caused by the extremity of the absorption coefficients, it is necessary to introduce additional diagnostic parameters, such as the ratio of leakage resistance to absorption resistance, as well as the critical value of the absorption time constant. Originality. The detailed analysis of the reasons of ambiguity of electric insulation technical diagnostics by absorption methods has been carried out. A method for eliminating the ambiguity caused by the extremity of the absorption coefficients has been proposed. Practical significance. To eliminate the ambiguity caused by the extremity of the absorption coefficients, additional diagnostic parameters are proposed – the ratio of leakage resistance to the absorption resistance and critical values of the absorption time constant. The applying of these parameters with the absorption coefficients will more adequately assess the technical condition of insulation. |
| publisher |
National Technical University "Kharkiv Polytechnic Institute" and Аnatolii Pidhornyi Institute of Power Machines and Systems of NAS of Ukraine |
| publishDate |
2021 |
| url |
http://eie.khpi.edu.ua/article/view/241239 |
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2025-07-17T11:48:38Z |
| last_indexed |
2025-07-17T11:48:38Z |
| _version_ |
1850411987877494784 |
| spelling |
eiekhpieduua-article-2412392021-12-03T08:03:07Z Reasoning of additional diagnostic parameters for electric insulation diagnostics by absorption methods Обґрунтування додаткових діагностичних параметрів для оцінки стану електричної ізоляції абсорбційними методами Kyrylenko, V.M. Kyrylenko, K.V. Budko, M.O. Denysiuk, P.L. non-destructive insulation diagnostics absorption methods of insulation diagnostics diagnostic parameters of insulation dielectric absorption ratio absorption index polarization index неруйнівні методи діагностування електричної ізоляції абсорбційні методи діагностування ізоляції діагностичні параметри ізоляції ємнісний і омічний коефіцієнти абсорбції коефіцієнти абсорбції і поляризації The aim of this work is to analyze the inadequacies of the diagnostic parameters, in particular the absorption and polarization coefficients, which are manifested in their integral character and dependence on the ratio of values of several elements of the equivalent scheme of insulation replacement. This article contains the results of theoretical investigation of the extremе nature of the absorption diagnostic parameters, which leads to unambiguity of the diagnostics procedure. The ways of partial adjustment of this unambiguity have been proposed. Methodology. To determine the extremality of the absorption coefficients depending on the absorption time, absorption capacity and resistance, as well as the leakage resistance, the usual method of investigating the functions was used, detailed calculations have been obtained by using MATLAB software. Results. Has been shown that the ambiguity of diagnostic results is caused by the contradiction of the integral character of the diagnostic parameters and the local character of the isolation failures, in particular breakdown, by ambiguous dependence of the diagnostic parameters on the values of the elements of the insulation replacement scheme and the extremal nature of the diagnostic parameters. Based on the general expression describing all currently used absorption coefficients, it is shown that they all have an extremum, the value of which depends on the parameters of the insulation substitution scheme and the time interval between the measurements of the absorption current. The dependence of the extreme value of the absorption and polarization coefficients on the parameters of the insulation substitution scheme has been established. Has been shown that to eliminate the ambiguity caused by the extremity of the absorption coefficients, it is necessary to introduce additional diagnostic parameters, such as the ratio of leakage resistance to absorption resistance, as well as the critical value of the absorption time constant. Originality. The detailed analysis of the reasons of ambiguity of electric insulation technical diagnostics by absorption methods has been carried out. A method for eliminating the ambiguity caused by the extremity of the absorption coefficients has been proposed. Practical significance. To eliminate the ambiguity caused by the extremity of the absorption coefficients, additional diagnostic parameters are proposed – the ratio of leakage resistance to the absorption resistance and critical values of the absorption time constant. The applying of these parameters with the absorption coefficients will more adequately assess the technical condition of insulation. В статті представлено результати аналізу екстремального характеру і зумовленої ним неоднозначності залежності абсорбційних коефіцієнтів від сталої часу абсорбції, а також залежності їх значень від відношення наскрізного опору ізоляції до її абсорбційного опору. Розраховано максимальні значення коефіцієнтів абсорбції і поляризації, а також сталої часу абсорбції, що відповідає їм, для різних значень відношення вказаних вище опорів. Обґрунтована можливість використання відношення наскрізного і абсорбційного опорів та абсорбційної сталої часу в якості додаткових діагностичних параметрів для усунення неоднозначності, пов’язаної з екстремальністю коефіцієнтів абсорбції і поляризації. National Technical University "Kharkiv Polytechnic Institute" and Аnatolii Pidhornyi Institute of Power Machines and Systems of NAS of Ukraine 2021-12-03 Article Article application/pdf application/pdf http://eie.khpi.edu.ua/article/view/241239 10.20998/2074-272X.2021.6.06 Electrical Engineering & Electromechanics; No. 6 (2021); 39-45 Электротехника и Электромеханика; № 6 (2021); 39-45 Електротехніка і Електромеханіка; № 6 (2021); 39-45 2309-3404 2074-272X en uk http://eie.khpi.edu.ua/article/view/241239/243333 http://eie.khpi.edu.ua/article/view/241239/243334 Copyright (c) 2021 V.M. Kyrylenko, K.V. Kyrylenko, M.O. Budko, P.L. Denysiuk http://creativecommons.org/licenses/by-nc/4.0 |