摘要
针对某变电站220 kV变压器油中多项特征气体含量超标的故障,利用特征气体法和三比值法对其故障原因进行了分析,并结合相关试验结果分析,判断出故障原因是变压器内部绝缘纸受潮导致局部放电,经过现场检查,验证了分析结果的正确性,并采取相应措施消除了变压器故障。
Aiming at the fault of multiple characteristic gases exceeding the standard in a 220 kV transformer oil,this paper analyzed the fault reasons according to the characteristic gas method and the three-ratio method,and combined with relevant tests,it was judged that the partial discharge of damp insulation paper inside the transformer caused the fault.The on-site inspection verifies the correctness of the failure analysis results and the corresponding measures were adopted to eliminate the transformer faults.
作者
李文志
孙威
朱娟
LI Wen-zhi;SUN Wei;ZHU Juan(Maintenance Company of State Grid Hunan Electric Power Co.,Ltd,Changsha 410004,China)
出处
《电工电气》
2019年第10期39-41,共3页
Electrotechnics Electric
关键词
特征气体法
三比值法
绝缘纸受潮
局部放电
characteristic gas method
three-ratio method
damp insulation paper
partial discharge
