Dry-type air-core reactor is in a state of vibration for a long time during operation and its vibration characteristics can reflect the operation state of the reactor. Interturn short circuit is the main fault that leads to the damage of dry-type air-core reactor and there is presently lack of effective fault monitoring means. In order to study further the vibration characteristics of reactor in the fault of interturn short circuit

the vibration distribution of dry-type air-core reactor under normal operation and interturn short circuit fault is studied by using laser Doppler vibration measurement system and also in combination with simulation. The results show that the electrodynamic force of the dry-type air-core reactor in normal operation shows the trend of squeezing reactor

and the vibration speed at the end of its encapsulation is higher than that in the middle of the encapsulation. In case of interturn short circuit

the electrodynamic force on the short circuit turn will also increase rapidly due to the short circuit current and distortion electromagnetic field near the short circuit turn

leading to the increase of vibration speed near the short circuit turn. The study work comprehensively reveals the vibration characteristics variation of reactor under interturn short circuit fault and provides a reference for the study of reactor condition monitoring method based on vibration characteristics.