一起500kV变压器局部放电故障的诊断与处理  

Diagnosis and Treatment of Partial Discharge Fault in 500kV Transformer

作　　者：赵军[1] 邢超[1] 朱思旭[1] 古海峰[1] 刘宏亮[1] 尹子会[2] 

机构地区：[1]国网河北省电力公司电力科学研究院,石家庄050021 [2]国网河北省电力公司检修分公司,石家庄050000

出　　处：《河北电力技术》2016年第2期57-59,共3页Hebei Electric Power

摘　　要：针对某500kV变电站4号变压器高压侧引线屏蔽管悬浮放电引起局部放电的问题,从放电电压、传递比、油色谱、支撑加压等方面进行试验分析,认为高压套管引线处屏蔽管与套管的电位连接线断裂是导致该变压器局部放电的原因,提出更换新等电位线的处理措施,通过对A相变压器进行各项交接试验,结果表明各项指标正常。为今后500kV变压器安装施工、运行维护和技术监督积累了经验。According to the problem for partial discharge caused by suspended discharge of high voltage side lead shielded-plate tube in a transformer in NO.4 500 kV substation,This paper analyses the test from the discharge voltage,transmission ratio,oil chromatogram,Support applied voltage etc.,considers that the break of connecting line between the high voltage bushing and shielding pipe leaded to the transformer partial discharge,proposes the treatment measures for the replacement of the new connecting line,through the A phase transformer for the commissioning test,the results showed that the indicators are normal.The experience has accumulated for 500 kV transformer installation,operation,maintenance and technical supervision in future.

关 键 词：变压器 局部放电 油色谱 屏蔽管 等电位线 

分 类 号：TM855[电气工程—高电压与绝缘技术]