Power Transformer Fault Severity Estimation Based on Dissolved Gas Analysis and Energy of Fault Formation Technique

Table 7

Comparison of severity accuracies of fault diagnosis models.

Method	Fuzzy Duval-EWR method [22]	Fuzzy IEC-EWR method [20]	Proposed fuzzy key gas-TFE method
Total fault cases tested	87	87	87
No. of correct diagnosis of faulty cases	79	78	75
Fault detecting % accuracy	90.8	89.7	86.2
Fault severity % accuracy	88	90.7	94.7