All-fiber Michelson transformer internal partial discharge ultrasonic signal detecting system and method

Abstract

The invention relates to an all-fiber Michelson transformer internal partial discharge ultrasonic signal detecting system and method. The system comprises a transformer housing module (1), a dedicatedchannel module for optical fiber arrangement (2), a transformer oil module (3), a transformer winding module (4), an optical fiber winding module (5), a first mirror module (6), a first 3db coupler module (71), a second 3db coupler module (72), a splitter module (9), a light source module ( 10), a mirror box module (11), a multi-channel photoelectric conversion and amplification device module (12), a multi-channel data synchronization acquisition device module (13), and a control and display device module (14). Compared with the prior art, the system has the advantages of being simple and practical, reducing the electromagnetic and external visible light interference problems, and positioning the power supply position.

Description

technical field [0001] The invention relates to the field of partial discharge ultrasonic signal detection, in particular to a system and method for detecting partial discharge ultrasonic signals inside an all-fiber Michelson transformer. Background technique [0002] At present, the ultrasonic detection method widely used in partial discharge of high-voltage electrical equipment is to use piezoelectric ultrasonic sensors fixed on the box wall of high-voltage electrical equipment (such as power transformers) to receive ultrasonic signals generated by internal partial discharges, thereby detecting partial discharges. detection and positioning. Because this method is subject to environmental noise such as electromagnetic interference (EMI), and the multi-path problem of ultrasonic waves propagating in high-voltage electrical equipment, it cannot accurately locate the discharge source. In order to eliminate or avoid the above-mentioned problems as much as possible, it is neces...

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Problems solved by technology

Because this method is subject to environmental noise such as electromagnetic interference (EMI), and the multi-path problem of ultrasonic waves propagating in high-voltage electrical equipment, it cannot accurately locate the discharge source.

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