A simulation test platform for radial deformation of transformer windings

Abstract

The invention belongs to a transformer winding deformation test research platform, in particular to a physical simulation platform for oil-immersed power transformer winding radial deformation. The existing laboratory winding deformation test platform simulates the on-site winding deformation by processing the transformer winding, while the transformer oil tank and iron core remain unchanged, and the winding is simply displaced, connected to the capacitor, and short-circuited. , 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 windings need to be taken out of the fuel tank, which is very troublesome. The invention changes the position of the deformation block (6) by converting the distributed capacitance change caused by the radial deformation of the winding into the distributed capacitance change caused by the deformation of the oil tank, which is equivalent to changing the deformation part of the winding, or changing the deformation range and deformation of the winding To a certain extent, the effect of simulating the radial deformation of the winding is easily achieved.

Description

technical field [0001] The invention belongs to a transformer winding deformation test research platform, in particular to a physical simulation platform for oil-immersed power transformer winding radial deformation. Background technique [0002] Transformer winding deformation refers to the irreversible change in the size or shape of the winding under the action of electrodynamic force and mechanical force. It includes changes in axial and radial dimensions, body displacement, winding twist, bulge and inter-turn short circuit, etc. In addition, the winding deformation also has a cumulative effect, that is, after being subjected to a short-circuit current impact, the transformer winding is not damaged immediately, and only has a small permanent deformation, but it leads to a decrease in its insulation performance and mechanical performance. When the next short-circuit current impacts, the winding deformation will be aggravated, and a vicious circle will appear. Therefore, ...

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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