Transfer Function Analysis to Evaluate Drying Quality of Power Transformers by Support Vector Machine

Abstract

For many years, an increasing interest existed in application of transfer functions (TF) method as a measure for detection of winding mechanical faults in transformers. However, this paper aims to change the application of TF method in order to evaluation of drying quality of power transformers during manufacturing process. For this purpose, support vector machine (SVM) is used. The required data for training and testing of SVM are carried out on 50MVA 132KV/33KV power transformer when the active part is placed in the drying chamber. Three dierent features extracted from the measured TFs are then used as the inputs to SVM to give an estimate for required time in drying process. The accuracy of proposed method is compared with the existing work in this eld. This comparison shows the superior capabilities of this proposed method.