Transformer winding deformation detection method

Abstract

The present invention discloses a transformer winding deformation detection method. The method comprises the steps of: constructing a transformer self-oscillation circuit, wherein the transformer self-oscillation circuit comprises a direct-current high voltage generator, a first control switch, a second control switch, a detected transformer and a detection device; closing the first control switchto allow the direct-current high voltage generator to allow a direct-current high voltage generator to charge a ground equivalent capacitor; disconnecting the first control switch, rapidly closing the second control switch to allow the detected transformer winding to discharge the ground equivalent capacitor, and forming a coupling voltage through magnetic coupling and capacity coupling of the detected transformer winding; detecting the detected transformer through the detection device to obtain the coupling voltage; and finally, according to the coupling voltage, determining whether the detected transformer winding generates deformation or not. The transformer winding deformation detection method can accurately and rapidly determine whether the transformer winding generates deformation or not and the deformation degree.

Description

technical field [0001] The present application relates to the technical field of transformer equipment, in particular to a method for detecting deformation of transformer windings. Background technique [0002] Transformer winding deformation refers to the irreversible change in the size and position of the winding when the inner coil winding of the transformer is subjected to mechanical force or electrodynamic force. After the transformer winding is deformed, the mechanical performance will decrease. If it runs for a long time or encounters overvoltage, it may cause damage to the transformer. Therefore, it is necessary to detect the deformation of the transformer winding to ensure the safe operation of the transformer. [0003] The commonly used methods to detect the deformation of transformer windings are short-circuit impedance method and frequency response method. Among them, the short-circuit impedance method refers to measuring the short-circuit impedance of the trans...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the inability to accurately and easily detect the deformation of transformer windings in the prior art, this application discloses a method for detecting deformation of transformer windings through the following embodiments

Images