Research on the application of transformer vibration model in the detection of turn-to-turn short-circuit fault

摘要

The magnitude of transformer vibration is influenced by that of voltage and current, which might lead to the wrong results in detecting the fault of core and winding by vibration analysis method. Based on the generation machnism of vibration signal, a transformer tank model was presented in this paper. It concerned about the relationship between the vibration (core vibration and winding vibration) and the operating parameter (voltage and current). The experiments were conducted in lab under different voltage and current, and then the vibration model was set up. Furthermore, this vibration model was also used to detect the simulated turn-to-turn short-circuit fault on windings. By comparing the vibration magnitude calculated by the model with the measured one, the defect condition of transformer was confirmed, which verifies that the vibration model presented in paper is effective.