一起550kV变压器绝缘故障的分析与处理  

Insulation Failure Analysis and Treatment of a 550 kV Power Transformer

作　　者：张晋[1] 梁基重[2] 赵淼 

机构地区：[1]国网北京市电力公司,北京100031 [2]国网山西省电力公司电力科学研究院,山西太原030001 [3]国网黑龙江省电力公司电力科学研究院,黑龙江哈尔滨150030

出　　处：《山西电力》2015年第5期6-8,共3页Shanxi Electric Power

摘　　要：通过油中溶解气体跟踪分析发现某550 kV变压器乙炔含量突然快速增长。结合历史运行工况及测试数据综合分析,判定其内部存在低能量裸金属放电,故障未涉及固体绝缘。将主变返厂吊罩,查明变压器运行异常主要由高压引线装置支撑衬条缺失引起,并提出了相应处理措施,保障了变压器的安全可靠运行。Acetylene content rapid increasing is revealed by testing the dissolved gas-in-oil of a 550 kV transformer. The causes of this fault are discussed based on historical operating conditions and testing data. It is pointed out that there is low energy bare metal discharge in transformer,but it has not affected solid insulation. The transformer＆#39;s abnormal operation is mainly caused by the lack of high-voltage wire device support strips,and corresponding treatment measures are proposed to ensure security and reliable operation of the transformer.

关 键 词：油中溶解气体 550kV变压器 快速增长 裸金属放电 

分 类 号：TM407[电气工程—电器]