环氧树脂绝缘站用变压器局部异常发热检测分析与消除  

Detection Analysis and Elimination of Local Abnormal Heating of Epoxy Resin Insulated Station Transformer

作　　者：刘泊辰 郝洪民 苗军 咸日常[2] 陈蕾 郭洋 李佳琪 LIU Bo-chen;HAO Hong-min;MIAO Jun;XIAN Ri-chang;CHEN Lei;GUO Yang;LI Jia-qi(State Grid Shandong Electric Power Company Zibo Power Supply Company,Zibo 255000,China;School of Electrical and Electronic Engineering,Shandong University of Technology,Zibo 255000,China)

机构地区：[1]国网山东省电力公司淄博供电公司,山东淄博255000 [2]山东理工大学电气与电子工程学院,山东淄博255000

出　　处：《电工电气》2021年第11期47-50,共4页Electrotechnics Electric

基　　金：国网山东省电力公司科技项目(2021A-014)。

摘　　要：由于站用变压器长期运行在高电压、高场强和负载电流条件下,所处环境工况复杂,其绝缘性能失效事件时有发生。通过红外热像仪测温、长焦相机拍照的带电检测方法,结合离线电气试验,分析了一起35kV干式绝缘站用变压器因局部机械受损、运行环境湿度大,从而导致其绕组环氧树脂绝缘性能下降并发生沿面放电,进而引起局部异常发热的案例,并介绍了修复方案和预防措施,为保障站用变压器的安全稳定运行和维修试验提供了参考。The insulation failure event of station transformers is a frequent occurrence due to the long-term operation of the transformers for power stations under high voltage and high electric stress,overload current,and complex working conditions.This paper analyzed a typical case a 35kV dry-type insulation substation transformer has a local heating phenomenon.The phenomenon is caused by the insulation of epoxy resin winding decreasing and creeping discharge,which was triggered by the mechanical fault and high environmental relative humidity.This article introduces the repair plan and preventive measures,which could provide a reference for ensuring the safe and stable operation and maintenance test of the transformers for power stations.

关 键 词：站用变压器 带电检测 绝缘性能 沿面放电 异常发热 

分 类 号：TM401[电气工程—电器]