On-line winding deformation diagnosis method, system and equipment of transformer

Abstract

The invention discloses an on-line winding deformation diagnosis method, system and device of a transformer. The method comprises the following steps: analyzing vibration characteristics of a transformer; drawing a relation curve of transformer vibration and load currents according to an analysis result of the vibration characteristics; and determining whether the winding deforms or not accordingto the linear degree of the relation curve of the transformer vibration and the load current. According to the embodiment of the invention, vibration characteristics before and after a transformer fault condition are detected and the characteristic change of the vibration frequency of the transformer can be extracted; on-line diagnosis of deformation of the transformer winding is realized throughthe relation curve of transformer vibration and load current. According to the invention, power failure operation does not need to be conducted on the transformer in the diagnosis process of the transformer, the deformation condition of the transformer winding can be detected in real time, and the stability of a power supply network of a power system is guaranteed.

Description

technical field [0001] The invention relates to the technical field of transformer diagnosis, in particular to a transformer online winding deformation diagnosis method, system and equipment. Background technique [0002] At present, as one of the main equipment of the power system, the transformer is responsible for the hub role of grid interconnection and power exchange. When the transformer is subjected to short-circuit impact or transportation collision and other factors, the transformer winding may be deformed under the action of electrodynamic force or mechanical force. There are three main types of deformation: (1) axial deformation, and the damage is mainly caused by magnetic flux leakage in the amplitude direction. Under the action of the axial electromagnetic force of the transformer, the axial deformation of the transformer winding is caused, including the bending deformation of the wire cake up and down, the collapse of the winding or the wire cake, and the lifti...

AI Technical Summary

Problems solved by technology

[0010] The present invention provides a transformer winding deformation diagnosis method, system and equipment on-line, which solves the technical problem of detecting transformer winding deformation faults in the prior art and requiring power failure

Images