摘要
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.
作者
董政
王小朋
牛丽丽
刘常军
金卫军
杜岳凡
DONG Zheng;WANG Xiaopeng;NIU Lili;LIU Changjun;JIN Weijun;DU Yuefan(State Grid Tianjin Power Maintenance Company,Tianjin 300000,China)
出处
《电工技术》
2019年第21期128-129,131,共3页
Electric Engineering
关键词
干式变压器
相间短路
接地铜屏蔽层
散热
局部发电
dry-type transformer
phase-to-phase short circuit
grounded copper shielding layer
heat dissipation
partial discharge