500 kV变压器内部短路损坏事故分析  

Analysis of a 500 kV Transformer Inner Short Circuit Damage

作　　者：杨静[1] 盛慧慧[2] 魏晓伟[3] 

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 [3]北京超高压公司,北京102413

出　　处：《高压电器》2010年第6期74-78,共5页High Voltage Apparatus

摘　　要：针对一起罕见的500 kV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、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。An accident of 500 kV transformer inner short circuit is explored by the change analysis of the oil chromatogram after accident,the local discharge online monitoring,and ultimate degradation analysis.It is found that this accident is caused by inner short circuit of high voltage winding.The insulation effect analysis of the phenomenon of Cu2S in the accident is performed.The accident analysis also includes soldering quality,insulation quality,and working environment,etc.Preventing measure is hence suggested.

关 键 词：500 KV变压器 匝间短路 绝缘 硫化铜 

分 类 号：TM407[电气工程—电器]