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

A technology of partial discharge and ultrasonic signals, which is applied in the direction of testing, instrumentation, measuring electricity using optical methods, and can solve problems such as inability to accurately locate the discharge source.

Inactive Publication Date: 2018-09-28
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
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  • Abstract
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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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  • All-fiber Michelson transformer internal partial discharge ultrasonic signal detecting system and method
  • All-fiber Michelson transformer internal partial discharge ultrasonic signal detecting system and method
  • All-fiber Michelson transformer internal partial discharge ultrasonic signal detecting system and method

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Embodiment Construction

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below, obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0035] The present invention tries to start from the practical application, overcome the shortcomings of the existing ultrasonic optical fiber sensor to detect the partial discharge signal, and propose a method and system for detecting the partial discharge ultrasonic signal inside the all-fiber Michelson transformer. That is, for the layout of the three windings of the transformer, based on the principle of Michelson optical fiber interference, the multi-channel data synchronous acquisition device is used to record th...

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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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1218G01R31/1227
Inventor 司文荣陆启宇陈璐徐鹏傅晨钊陈洪岗黄华袁鹏
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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