Work stability of transformer directly relates to transformer substation safe operation

it focus is to detect the transformer partial discharge of ultrasonic signal. A kind of optical fiber F-P sensor is introduced

and based on the structures modulation and demodulation system is set up

experimental test in three situations

ultrasonic waves

no ultrasonic waves and immersed transformer oil is carried out

and loss characteristics test is carried out range from the ultrasonic waves 20

40

60

80

90

100 cm. Test results show that the sensor is free of outside noise interference

and can real time detect ultrasonic signal in transformer oil

it has high precision and its loss degree is 25. 8 m V/cm

conforms to the sensor in conditions of steady work in oil-immersed transformer. When the transformer fails

problem can be found in time and the safe operation of the transformer is guaranteed.