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Supersonic deformation detecting method and detector for transformer winding

A transformer winding, ultrasonic detection technology, applied in the direction of measuring devices, using sound waves/ultrasonic waves/infrasonic waves to analyze solids, using sound waves/ultrasonic waves/infrasonic waves for material analysis, etc., can solve problems such as restrictions on popularization and use, winding deformation difficulties, etc., to achieve cost Low cost, easy operation and high detection efficiency

Inactive Publication Date: 2002-01-23
WUHAN UNIV
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Problems solved by technology

However, these two methods indirectly judge the winding deformation by judging the change of the electrical parameters before and after the winding deformation. Due to the limitation of its detection principle, coupled with the influence of the complexity and randomness of the position and size of the winding deformation, it is necessary to accurately It is very difficult to reliably determine the location and size of winding deformation, so the popularization and use of these two methods is limited

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  • Supersonic deformation detecting method and detector for transformer winding
  • Supersonic deformation detecting method and detector for transformer winding
  • Supersonic deformation detecting method and detector for transformer winding

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Embodiment Construction

[0031] The working principle of the present invention will be further described below in conjunction with the drawings and embodiments.

[0032] According to theoretical research, when ultrasonic waves propagate in two media, at the interface of the media, due to the difference in acoustic impedance, the ultrasonic waves are reflected at the interface of the media. Such as figure 1 As shown, the ultrasonic detection working principle of the present invention is as follows: the acoustic radiation surface of the ultrasonic probe 2 is coated with a coupling agent to keep it in close contact with the transformer oil tank shell 1.1, and the ultrasonic probe 2 emits pulsed ultrasonic waves, and the pulsed ultrasonic waves pass through the transformer. The oil tank casing 1.1 and the transformer oil 1.4 propagate, and on the surface of the high voltage winding 1.2, or through the oil channel 1.5, on the surface of the low voltage winding 1.3, reflection occurs due to the difference i...

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Abstract

Based on the pulse supersonic wave reflection principle and after the supersonic probe is made to contact closely with the casing of transformer oil tank, pulse supersonic wave is transmitted and thereflected supersonic wave is received by the supersonic probe and the received supersonic wave is transferred into corresponding electric pulse signal, which is amplified in the detecting circuits and treated in computer to obtain the shape, size and deformation of the transformer winding. The detector consists of supersonic probe, detecting circuits and computer and the detecting circuits consist of isolating circuit, pulse trigger circuit, amplifier circuit, data collector, etc. The present invention can measure the shape and size of transformer to ensure the safety of power system.

Description

(1) Technical field [0001] The invention belongs to the technical field of electrical equipment fault diagnosis, in particular to an ultrasonic detection method and device for transformer winding deformation. (2) Technical background [0002] The power transformer is one of the most widely used and most critical components in the power system, and plays a very important role in the power system. However, when the power transformer is in the process of transportation or when a short-circuit fault occurs in the power system, the winding will be displaced or deformed by the impact of strong mechanical force or electrodynamic force, resulting in damage to the insulation of the winding and potential accidents. If the fault is not found in time , and put the transformer into operation, it will burn out the transformer and cause a large-scale blackout, which seriously threatens the safe operation of the power system. [0003] At present, the electric test method and spectrum metho...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01N29/06
CPCG01N2291/044
Inventor 舒乃秋张承学向铁元毛慧和
Owner WUHAN UNIV
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