Real-time fault detection equipment in transformer substation

The utility model discloses a real-time fault detection device in a transformer substation. Comprising a signal transmission optical cable and an optical fiber vibration signal demodulation device, the signal transmission optical cable is designed, a plurality of optical fiber vibration sensors are connected in series on the signal transmission optical cable, and the optical fiber vibration sensors are respectively arranged on fault detection points of a transformer substation; the optical fiber vibration signal demodulation equipment is connected with the optical fiber vibration sensor through a signal transmission optical cable, detects the fault of each fault detection point through the optical fiber vibration sensor, and then transmits a detection signal to the optical fiber vibration signal demodulation equipment through the signal transmission optical cable; each fault detection point can be continuously monitored in a long distance through the optical fiber vibration sensor, the fault condition of the