Major Defects and Diagnostics of Solid Insulation of Power Transformers

被引：0
作者：
Dolin A.P. [1 ]
Kipriyanova M.M. [2 ]
机构：
[1] STC “Electrical-Engineering, Diagnostic and Service” (STC “EDS”), Moscow
[2] National Research University “Moscow Power Engineering Institute” (MPEI), Moscow
来源：
Power Technology and Engineering | 2022年 / 56卷 / 04期
关键词：
degree of polymerization; moisture content; partial discharges; pollution; power transformer; sludging; solid insulation;
D O I：
10.1007/s10749-023-01561-5
中图分类号：
学科分类号：
摘要：
The main defects and diagnostics methods of paper-, wood-, and polymer-based solid insulation used in power transformers are presented. Specific examples of pollution, sludging, moisturizing, and mechanical defects and their development during partial and arc discharges are discussed. The distribution of moisture content of cellulose insulation along the height of transformers with natural and forced oil circulation is analyzed. The danger of local wetting of solid insulation is noted. Examples of transformer failures as a result of moistening of wooden strips for attaching taps, as well as defects in epoxy insulation of low-voltage transposed conductor windings, are given. © 2023, Springer Science+Business Media, LLC, part of Springer Nature.
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页码：612 / 618
页数：6
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