Method for setting axial heat dissipation oil ducts of transformer windings

Abstract

The invention relates to a method for setting axial heat dissipation oil ducts of transformer windings, and belongs to the technical field of transformers and electric reactors. According to the technical scheme, the method comprises that: 1, magnetic field numerical analysis software is used for calculating winding internal magnetic flux density distribution, and a winding magnetic flux distribution calculation result is obtained; (2) according to a winding magnetic flux distribution numerical calculation result, axial heat dissipation oil ducts of windings at different positions of differentwire cakes are set; and (3) the distribution of the axial heat dissipation oil ducts of the windings at the different positions of the different wire cakes is matched with the winding magnetic flux distribution numerical calculation result. The method has the beneficial effects that the magnetic flux density distribution in the transformer or the electric reactor winding is calculated by using magnetic field numerical analysis software, and the axial heat dissipation oil ducts are arranged at the different positions of the different wire cakes according to the calculation result, so that theaverage temperature rise and the hottest point temperature rise of the windings are greatly reduced, and local overheating in the windings is avoided.

Description

Technical field [0001] The invention relates to a method for setting an axial heat dissipation oil passage of a transformer winding, and belongs to the technical field of transformers and reactors. Background technique [0002] With the increasing capacity of power transformers and reactors, the leakage flux generated by the transformer or reactor windings becomes larger and larger, resulting in excessive eddy current loss in the local wires of the windings, and excessive temperature rise in the hottest spot of the windings, which seriously affects the transformer Or the safe operation of the reactor. Summary of the invention [0003] The purpose of the present invention is to provide a method for setting the axial heat dissipation oil passages of transformer windings. The magnetic field numerical analysis software is used to calculate the internal magnetic flux density distribution of the transformer or reactor windings. According to the calculation results, the axial heat dissip...

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Problems solved by technology

[0002] With the increasing capacity of power transformers and reactors, the leakage magnetic flux generated by the transformer or reactor windings is increasing, resulting in excessive eddy current losses in the local wires of the windings, and the temperature rise of the hottest spots of the windings is too high, which seriously affects the transformer. or safe operation of the reactor

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