带接地铜屏蔽层的干式变压器性能分析

Performance Analysis of Dry-Type Transformer with Grounded Copper Shield

某220 kV变电站相继发生两起35 kV站用干式变压器相间短路跳闸事故,发生事故的站用变均为采用接地铜屏蔽层的新结构干式变压器。对这种干式变压器的性能进行研究,并分析了其他新型结构干式变压器的优缺点。

A 220 kV substation has two phase-to-phase short-circuit tripping accidents for dry-type transformers.The fault transformers are grounded with copper shielding layer on the inside of high-voltage coils.In this paper,the performance of this dry-type transformer was studied,and the advantages and disadvantages of some other new-structure dry-type transformers were also analyzed.