一起500 kV变电站主变压器油色谱数据异常案例分析  

Analysis of Abnormal Oil Chromatography Data of Main Transformer in a 500 kV Substation

作　　者：和兆伟 徐璐 任庆帅 HE Zhaowei;XU Lu;REN Qingshuai(State Grid Shandong Electric Extrahigh Voltage Company,Jinan 250118,China)

机构地区：[1]国网山东省电力公司超高压公司,山东济南250118

出　　处：《山东电力高等专科学校学报》2023年第5期22-24,共3页Journal of Shandong Electric Power College

摘　　要：对某500 kV变电站主变压器C相油色谱数据H2含量持续超标的问题进行分析,以为今后类似变压器内部异常的分析和处理提供借鉴。分析该单相变压器近一年来的油色谱在线及离线监测数据,对其进行局部放电试验及内部检查,发现绝缘纸受潮导致变压器内部发生低能量放电,频域介电谱测试结果也证明C相变压器绝缘纸含水量高于其他两相。The problem of continuous elevated H2 content in the C phase oil chromatography data of the main transformer in a 500 kV substation is analyzed so as to provide reference for analyzing and handling similar internal abnormalities of transformers in the future.The oil chromatography online and offline monitoring data of this single-phase transformer over the past year are ana⁃lyzed,the partial discharge test and the internal inspection are conducted on the transformer,and it is found that the damp of the insulation paper results in the low-energy discharge inside the transformer.The results of frequency domain dielectric spectrosco⁃py test also prove that the moisture content of the insulation paper of the C phase transformer is higher than that of the other two phases.

关 键 词：变压器 油色谱 局部放电试验 低能放电 

分 类 号：TM411[电气工程—电器]