一起110kV变压器内部总烃超标缺陷分析及处理  

Analysis and Treatment of Defect of Total Hydrocarbon Exceeding Standard inside 110kV Transformer

作　　者：杨次 沈洪 柯康观 黄文彬 YANG Ci;SHEN Hong;KE Kangguan;HUANG Wenbin(Shenzhen Power Supply Bureau Co.,Ltd.,Shenzhen 518000,China)

机构地区：[1]深圳供电局有限公司,广东深圳518000

出　　处：《变压器》2024年第9期65-68,共4页Transformer

摘　　要：本文针对一台110kV变压器绝缘油中乙炔和总烃含量异常,结合历史跟踪曲线,诊断该变压器内部存在高温过热故障,通过停电试验,发现低压绕组直流电阻平衡率不合格,经解体检查确认该变压器低压绕组b相套管导电杆与绕组引线连接处存在接触不良,经现场缺陷处理后,跟踪该变压器投入运行后绝缘油中气体正常。This article focuses on the abnormal content of acetylene and total hydrocarbons in the insulation oil of a 110kV transformer.Based on historical tracking curves,it is diagnosed that there is a high temperature and overheating fault inside the transformer.Through power outage tests,it is found that the DC resistance balance rate of the low-voltage winding is not qualified.After physical examination,it is confirmed that there is poor contact at the connection between the B-phase bushing conductor and the winding lead of the low-voltage winding of the transformer.After on-site defect treatment,the gas in the insulation oil is normal after the transformer is put into operation.

关 键 词：变压器 总烃 乙炔 过热 直阻 

分 类 号：TM406[电气工程—电器]