Power transformer partial discharge detection system and method based on fiber bragg grating
A technology for partial discharge detection and power transformers, applied in the direction of testing dielectric strength, etc., can solve the problems of poor sensitivity of ultrasonic sensors, easy to be affected by electromagnetic interference, poor anti-interference ability, etc., to achieve strong anti-electronic interference ability and reduce the impact. , high precision effect
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[0016] Such as figure 1 As shown, the partial discharge detection system for power transformers based on fiber Bragg gratings of the present invention includes: LD pump source 1, wavelength division multiplexer (WDM) 2, erbium-doped optical fiber (EDF) 3, isolator (ISO) 4. First and second fiber couplers 5 and 8, first and second fiber Bragg gratings (FBG) 6 and 7, photodetector 9, acoustic emission acquisition card 10, computer 11; wherein, LD pumping source 1 , WDM 2, EDF 3, ISO 4, and the first fiber coupler 5 are in the same loop to form a ring cavity erbium-doped fiber laser; the A port and B port of the first fiber coupler 5 are in the above loop; the first coupling The C port of the device 5 is connected to the first FBG 6, the D port of the first fiber coupler 5 is connected to the E port of the second fiber coupler 8; the G port of the second fiber coupler 8 is connected to the second FBG 7, and the second fiber The F port of the coupler 8 is connected with the photo...
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