Determination of Transformer Winding Radial Deformation Using UWB System and Hyperboloid Method

Online monitoring of the transformer winding using electromagnetic waves has recently been proposed for the detection of mechanical defects of transformer winding. In this paper, a new method, which uses the ultrawideband radar measurement results and is based on locus of objects in the space, is proposed for the 3-D positioning of transformer winding radial deformation location. The proposed experimental setup for this method named hyperboloid method is modeled using Computer Simulation Technology software. In this paper, Vivaldi antennas suitable for measurements in environments with multipath, are used and the analysis is performed in the time domain. The simulation results show that the exact 3-D location of the radial deformation can be detected with a good accuracy.