РОЗДІЛЕННЯ АБСОРБЦІЙНИХ ПРОЦЕСІВ В НЕОДНОРІДНІЙ ІЗОЛЯЦІЇ ЗА КРИВИМИ ВІДНОВЛЮВАЛЬНОЇ НАПРУГИ СИЛОВИХ ВИСОКОВОЛЬТНИХ КАБЕЛІВ

Based on the proposed model of spatially inhomogeneous two-layer insulation in the form of a series-parallel substitution scheme with three relaxation chains, the calculated recovery voltage curves of phase and belt paper-impregnated insulation of power cables are obtained. The model was verified by...

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Bibliographic Details
Date:2021
Main Authors: Безпрозванних, Г.В., Костюков, І.О., Москвітін, Є.С.
Format: Article
Language:Ukrainian
Published: Інститут електродинаміки НАН України, Київ 2021
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Online Access:https://techned.org.ua/index.php/techned/article/view/205
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Journal Title:Technical Electrodynamics

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Technical Electrodynamics
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Summary:Based on the proposed model of spatially inhomogeneous two-layer insulation in the form of a series-parallel substitution scheme with three relaxation chains, the calculated recovery voltage curves of phase and belt paper-impregnated insulation of power cables are obtained. The model was verified by comparison with the experimental voltage curve of the power cable with paper-impregnated insulation at a voltage of 6 kV. The possibility of separation of delayed absorption processes in inhomogeneous insulation is substantiated on the basis of the analysis of high-frequency components of the spectrum of time dependences of the recovery voltage curves. The effectiveness of wavelet transform for detailing the absorption characteristics of inhomogeneous insulation of power cables is confirmed. The presence of two maxima and the dynamics of change of the ratio between them in the process of aging of inhomogeneous insulation on the reproducible curves of the regenerative voltage of power cables are established. Based on the relationship between the two amplitude values of the reproducible reduction voltage, the preferred absorption processes are determined and the appropriate criteria for assessing the state of inhomogeneous insulation of power cables are established.  References 16, figure 5.