Analysis of Interturn Faults on Transformer Based on Electromagnetic-Mechanical Coupling

A running transformer frequently experiences interturn faults; they are typically difficult to detect in their early stages but eventually progress short circuits, which cause damage the transformer. Therefore, finding out fault mechanism of full process can provide a theoretical basis for detection. In this paper, an electromagnetic-solid mechanics coupled finite element model consistent with actual oil-immersed three-phase is established. The transient winding from discharge circuit simulated study electromagnetic characteristics as well mechanical during failure. parameters obtain current, and other performance magnetic field coil force when faults occur. Finally, vibration casing used diagnose situation, providing detection diagnosis capability improvement measures.