基于DGA数据的变压器过热故障诊断

Diagnosis of Overheating Fault of Transformers based on Dissolved Gas-in-oil Analysis Data

过热故障在变压器故障中占了很大的比重,结合DGA数据与三比值法,探究变压器过热故障的分类规律,运用最小二乘法分别对电路过热和磁路过热的数据进行分析总结,发现在CH4/H2的比值为2时,可简易区分电路过热和磁路过热。

Overheating fault takes a large proportion in transformer faults.Combining the dissolved gas-in-oil analysis(DGA)data and the three-ratio method,this paper explores the classification of overheating faults of transformers.The least square method is used to analyze the magnetic circuit overheating data and the electric circuit overheating data.It is found that when the ratio of CH4/H2 is 2,the magnetic circuit overheating and the electric circuit overheating can be easily distinguished.