摘要
针对一起变电站500 kV主变压器爆炸事件,根据事件后主变压器的外观、保护动作情况以及现场视频文件,确定主变压器爆炸是内部故障引起的;结合主变压器其他相别的历史检修记录、运行情况以及本次故障电流的大小,进一步确定主变压器内部故障为金属性短路;最后根据主变压器本体及套管解体后发现的内部放电灼烧痕迹以及变压器的结构特点,阐明了主变压器爆炸的形成机理及短路故障的发展过程。
Aiming at one explosion of 500 kV main transformer,according to appearance,protection action and video files on site of the main transformer,it was confirmed that explosion of the main transformer was caused by internal fault. Com-bining historical maintenance records,operation situations and current size of other phases of the main transformer,external fault of the transformer was determined as metallic short-circuit. According to burning marks of internal discharge after dis-assembly of body and tubes of the main transformer and structure characteristic of the transformer,form mechanism of ex-plosion and developing process of short-circuit fault was stated.
出处
《广东电力》
2015年第4期117-120,共4页
Guangdong Electric Power
关键词
变压器
爆炸
“小桥”理论
金属性短路
transformer
explosion
small bridge theory
metallic short-circuit
