变压器运行中短路损坏的原因分析（Analysis of the causes of short-circuit damage of transformer）.docVIP

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变压器运行中短路损坏的原因分析（Analysis of the causes of short-circuit damage of transformer）.doc

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变压器运行中短路损坏的原因分析（Analysis of the causes of short-circuit damage of transformer）

变压器运行中短路损坏的原因分析（Analysis of the causes of short-circuit damage of transformer） Cause analysis of short circuit damage in transformer operation Source: China paper Download Center [06-03-03 16:34:00] author: anonymous editor: studa9ngns Abstract: through Shanghai exports in recent years short some examples of transformer damage analysis due to electromagnetic wire caused by transformer damage and existing problems, and some suggestions on the selection of electric power transformer design and electromagnetic wire is put forward. Key words: transformer; short-circuit resistance; electric power winding; electromagnetic wire accident 1 Preface In recent years, transformer accidents have occurred, and there is a trend of growth. From the analysis of transformer accident situation, the shortage of short circuit resistance has become the primary cause of the power transformer accident, which causes great harm to the power grid, and seriously affects the safe operation of the power grid. In this paper, the Shanghai Municipal Electric Power Company for nearly ten years due to the damage caused by the external power transformer short-circuit accident situation to make a classification analysis, and puts forward the selection problems of electromagnetic wire and reduce this kind of accidents, to promote manufacturing factory to product improvement and perfection, and promote the operation units to further improve the level of operation and management. 2 transformer short-circuit accident From January 1993 to December 2002, Shanghai electric power transformer short-circuit accident cumulative damage 17 times, accounted for the entire damage accident of 77.3%, is the main reason for the damage, the total capacity of 2750MVA. The 500kV 2 times, 220kV 13 times, 110kV 2, low voltage coil serious deformation had to replace the coil 220kV grade 1, 110kV grade 1, 220kV grade in transformer in low voltage winding deformation phenomenon of 4 units, the operation found 500kV winding defo