Exact determination of a winding disk radial deformation location considering tank effect using an analytical method

Power transformers are one of the most expensive components of the power system. Timely detection of fault arose in the transformer can be used to prevent unwanted outage of transformer and repair costs. Using electromagnetic waves has recently been proposed for on-line monitoring of the transformer. The presence of the tank in the transformer structure causes problem for analyzing the electromagnetic waves. In this paper, a new analytical method based on locus of the objects in the space is proposed to detect the radial deformation location of a disk winding considering tank effect. The proposed experimental setup for this method has been modeled using CST (Computer Simulation Technology) software. In this paper, Vivaldi antennas suitable for measurements in environments with multi-path routing are used and the analysis is performed in the time domain. The simulation results show that exact determination of radial deformation location can be detected with good accuracy using this method.