Low-low high-voltage transformer winding structure and transformer

Abstract

The low-low high-voltage transformer winding structure comprises an inner low-voltage winding, an outer low-voltage winding and a high-voltage winding which are arranged from inside to outside, and the outer low-voltage winding comprises an outer low-voltage winding upper branch and an outer low-voltage winding lower branch. The high-voltage winding adopts a structure that an upper circuit and a lower circuit are connected in parallel, and a wire is led out from the middle of the head end, the low-voltage winding is divided into an inner low-voltage winding and an outer low-voltage winding, and the outer low-voltage winding is divided into an outer low-voltage upper branch and an outer low-voltage lower branch; the outer low-voltage upper and lower branches are respectively connected in series with the head and tail ends of the inner low-voltage winding and are separated by a certain distance in the axial direction, so that enough insulation safety margin with a high-field-intensity area in the middle of the high-voltage winding is ensured. And the inner low-voltage winding, the outer low-voltage winding and the high-voltage winding are arranged from inside to outside to form a low-low-high winding arrangement. The invention provides a novel low-low-high winding arrangement mode, the reactance value of the transformer winding or the reactance height of the winding can be reduced, and meanwhile, the use amount of winding materials is not increased or even reduced.

Description

technical field [0001] The invention belongs to the technical field of power system equipment manufacturing and transformers, and particularly relates to a low-low-voltage transformer winding structure. Background technique [0002] In the design of traditional power transformers, the high-low-high winding arrangement can be formed by splitting the high-voltage windings into inner high-voltage windings and outer high-voltage impedances to reduce the short-circuit impedance of the transformer or reduce the height of the winding reactance, but for high-voltage power For transformers, the high-low-high winding arrangement can significantly increase the material usage of the windings. [0003] The purpose of the present invention is to provide a new low-low-high winding arrangement, which can reduce the short-circuit impedance of transformer windings or reduce the height of winding reactance without increasing or even reducing the amount of winding materials, so as to solve the ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a new low-low-high winding arrangement, which can reduce the short-circuit impedance of transformer windings or reduce the height of winding reactance without increasing or even reducing the amount of winding materials, so as to solve the problem of transportation of high-voltage and large-capacity power transformers question

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