Simulated test platform for axial winding deformation of transformer

Abstract

The invention belongs to a research platform of winding deformation test for a transformer, especially to a physical simulation platform for the axial winding deformation of an oil-immersed transformer. According to a present winding deformation test platform in labs, the transformer winding is processed, including simple shift, access to a capacitor and short circuit of a turn, to simulate onsite winding deformation, an oil tank and an iron core of the transformer are not changed, the present platform is not flexible or accurate enough and is hard to simulate deformation in different shapes, positions and ranges conveniently; and when a deformed part or capacitor is replaced, the winding needs to be removed from the oil tank and causes much trouble. Distributed capacitance change caused by axial deformation of the winding is changed into distributed capacitance change caused by deformation of the oil tank, the positions of deformation blocks (6) are changed, namely, the deformed part of the winding is changed or the deformation range and degree of the winding are changed, and axial deformation of the winding is simulated simply.

Description

Technical field [0001] The invention belongs to a transformer winding deformation test research platform, in particular to a physical simulation platform for the axial deformation of an oil-immersed power transformer winding. Background technique [0002] Transformer winding deformation refers to the irreversible change in the size or shape of the winding under the action of electric and mechanical forces. It includes changes in axial and radial dimensions, body displacement, winding twists, bulging, and inter-turn short circuits. In addition, the winding deformation also has a cumulative effect, that is: after a short-circuit current impact, the transformer winding is not immediately damaged, only a small permanent deformation, but it leads to a decline in its insulation and mechanical properties. In the next short-circuit current impact, the winding deformation will be aggravated and a vicious circle will appear. Therefore, a transformer with a deformed winding is a hidden ac...

AI Technical Summary

Problems solved by technology

Simply shifting the winding, connecting capacitors, short-circuiting turns, etc., is not flexible and accurate enough, and it is difficult to simulate deformations of various shapes, positions, and ranges conveniently, and when replacing deformed parts, capacitors, etc., the winding needs to It is very troublesome to take it out from the oil tank, which greatly restricts the efficiency and effect of the experimental research of the winding deformation detection method, and limits the development and improvement of the winding deformation detection technology.

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