Localization of winding radial deformation and determination of deformation extent using vector fitting‐based estimated transfer function

This paper suggests a new method to detect the location and the extent of the winding buckling which is based on the transfer function (TF) estimation using the vector fitting (VF) method. To study the proposed method, the verified detailed model of the transformer winding in the frequency range of kHz < f < MHz has been developed. The simulation results indicate the capability of the proposed method to localize the deformed section in the transformer winding. In addition, the proposed method presents an index for the determination of the deformation extent.