Axial double-split dry-type transformer coil structure with same connection groups and winding method

Abstract

The invention discloses an axial double-split dry-type transformer coil structure with the same connection groups and a winding method. The axial double-split dry-type transformer coil structure comprises a first low-voltage coil, a second low-voltage coil and a group of high-voltage coils, wherein each of the first low-voltage coil and the second low-voltage coil is provided with two low-voltage coil sections, the two low-voltage coil sections of the first low-voltage coil and the two low-voltage coil sections of the second low-voltage coil are distributed in a cross mode, and two sections of leads for winding forming of the first low-voltage coil and the second low-voltage coil are leaded in and out from the upper end and the lower end respectively. The high-voltage coils are provided with multiple high-voltage coil sections distributed in the axial direction, the high-voltage coil sections are sequentially and mutually connected in series, and leads for winding forming of the high-voltage coils are leaded in and out from the upper end and the lower end respectively. The axial height of the first low-voltage coil and the axial height of the second low-voltage coil are both consistent to the axial height of the high-voltage coils.

Description

technical field [0001] The invention relates to the technical field of dry-type transformers, in particular to the coil structure and winding method of an axial double-split dry-type transformer with the same connection group. Background technique [0002] At present, with the rise of new energy sources such as wind power generation and photovoltaic power generation, the demand for double-split dry-type transformers is also increasing. However, the previous traditional structure is that the high-voltage coil adopts two-way parallel incoming lines in the middle, and has a multi-segment structure; the low-voltage coil is divided into upper and lower coils, and the two coils are wound separately and then combined, or even though they are wound simultaneously on the same axis, However, the foils of the upper and lower coils are not cross-transposed. [0003] Such as Figure 1 to Figure 3 Shown is the existing dry-type transformer coil structure, 01 and 02 in the figure are low-...

AI Technical Summary

Problems solved by technology

If only one set of low-voltage coils is used, the other set of unused low-voltage coils has no current flow, which is equivalent to the absence of this set of low-voltage coils, which will cause the ampere-turn imbalance of the coils along the axial height in this area, and the coils are volatile. stable, resulting in accidents

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