某500kV变压器内部短路损坏事故分析  

Damage Incident Analysis for 500kV Transformer Inner Short Circuit

作　　者：盛慧慧[1] 杨静[2] 

机构地区：[1]华北电网有限公司,北京100053 [2]北京市电力公司,北京100031

出　　处：《现代电力》2009年第4期20-25,共6页Modern Electric Power

摘　　要：针对一起罕见的500kV变压器匝间短路事故,通过对事故前后的油色谱、局部放电在线监测以及最终解体分析,得出事故原因是由于高压绕组发生了匝间短路。对事故中硫化铜现象进行了绝缘影响分析。从设备焊接、应力集中、绝缘质量,外部运行环境等方面分析事故原因,提出了预防措施,供电力设备运行及生产企业借鉴。For an unusual incident of 500kV transformer inner short circuit, the oil chromatogram change before and after the incident, local discharge online monitoring and ultimate disgradation are analyzed, and it is concluded that the incident is caused by the inner short circuit of high voltage windings. The insulation effect of the Cu2S phenomenon in the incident is analyzed. The equipment jointing, stress concentration, insulation quality, outside running condition are disscused, and the precaution measures are suggesed for reference of electric power equipment running and production enterprises.

关 键 词：500KV变压器 匝间短路 应力集中 绝缘 硫化铜 

分 类 号：TM411.2[电气工程—电器] TM407