Simulation of on-line monitoring of transformer winding axial displacement

Mechanical or electromechanical forces can cause axial displacement of transformer winding. In this paper a new monitoring method based on Ultra Wide Band (UWB) waves to detect the axial displacement of the high voltage and low voltage winding of large power transformers is proposed. The proposed experimental set-up for this method has been modelled using CST (Computer Simulation Technology) software. The simulation results show that the upward and downward axial displacement of windings can be detected by the on-line monitoring of UWB wave.