Cause Analysis of a 500 kV Transformer Oil Gas Content Exceeding the Attention Value

Based on the introduction of the significance of gas content chromatographic test of transformer oil and the principle of test method, through the actual production experience and case analysis, the reasons for the abnormal increase of gas content in oil leading to the over attention value are summarized. Analysis and discussion are carried out to provide methods and suggestions for quickly and accurately finding and eliminating the defects of poor sealing of transformers.