Method and device for determining inter-turn short circuit fault of reactor

The invention discloses a method and device for determining an inter-turn short circuit fault of a reactor. The method for determining the inter-turn short circuit fault of the reactor comprises the following steps: a reference voltage differential signal between each pair of magnetic field detectors of the reactor is predetermined under the condition that the reactor is in a normal operation state, wherein a plurality of pairs of magnetic field detectors are arranged outside a winding coil of the reactor; a voltage differential signal between each pair of magnetic field detectors is acquiredin the running process of the reactor; whether the reactor has the inter-turn short circuit fault is determined by comparing the reference voltage differential signal with the voltage difference signal. The method and device for determining the inter-turn short circuit fault of the reactor solves the technical problems in the prior art that the detection efficiency for the inter-turn short circuitfault of a dry-type iron