220kV主变压器油中氢气含量异常分析与处理  

Analysis and Treatment of Abnormal Hydrogen Content in 220 kV Main Transformer Oil

作　　者：温向炜 王栓虎 王瑾 郭韶昕 高璐 WEN Xiangwei;WANG Shuanhu;WANG Jin;GUO Shaoxin;GAO Lu(Inner Mongolia Jingneng Ulan Yiligeng Wind Power Generation Limited Liability Company,Bayannur 015300,China;Jingneng New Energy Inner Mongolia Branch,Hohhot 010070,China)

机构地区：[1]内蒙古京能乌兰伊力更风力发电有限责任公司,内蒙古巴彦淖尔015300 [2]京能新能源内蒙古分公司,呼和浩特010070

出　　处：《内蒙古电力技术》2020年第2期81-83,共3页Inner Mongolia Electric Power

摘　　要：针对内蒙古某光伏电站的1起220 kV主变压器油中氢气含量超标故障,结合故障现象、测试数据,通过油色谱三比值法确定故障类型为局部放电。经过测试分析及原因排查,确定故障原因为主变压器内部受潮引起氢气析出。将主变压器停运,进行72 h真空滤油脱气及真空干燥,静置48 h重新投入运行,氢气体积分数稳定在23×10-6左右,异常情况得到解决。In view of an abnormal hydrogen content event in 220 kV main transformer oil of a photovoltaic power station in Inner Mongolia,the causes are analyzed in depth combined with the event phenomenon,test records and the principle of oil chromatography three-ratio method.Through test analysis and cause checking,it is determined that the failure reason is hydrogen precipitation caused by moisture in the main transformer.Make the main transformer shut down to carry out the vacuum filter oil degassing and vacuum drying for 72 hours.The unit returns to service after 48 hours′standing.And the hydrogen volume fraction is stabilized at 23×10-6.The abnormal problem is solved.

关 键 词：主变压器 变压器油 氢气 三比值法 色谱分析 

分 类 号：TM407[电气工程—电器]