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Shell type transformer with high-voltage winding being layered winding

A technology for shell-type transformers and high-voltage transformers, which is applied to transformer/inductor cores, transformer/inductor components, transformer/inductor coils/windings/connections, etc. Problems such as complex distribution and the need to lay down the body of the device

Pending Publication Date: 2021-12-17
孙崇山
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The disadvantages of shell-type transformers are that the cost is too high, the magnetic flux distribution in the iron core is complicated, and the three-phase line voltage is easy to be unbalanced.
[0014] Shell-type transformers are mainly used in ultra-high voltage and ultra-high voltage transformers. The coils mainly adopt full-tangle type and insertion capacitor type. Because of the high voltage level and the body needs to be placed horizontally, layer winding cannot be used.

Method used

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  • Shell type transformer with high-voltage winding being layered winding
  • Shell type transformer with high-voltage winding being layered winding
  • Shell type transformer with high-voltage winding being layered winding

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0085] Example 1, S13—400 / 10±2×0.25% / 0.4

[0086] National standard: load loss Pk=4200W

[0087] No-load loss P0=410W

[0088] No-load current percentage I0%=0.8%

[0089] Impedance voltage percentage Uk%=4%

[0090] Total loss P=4930 W

[0091] 1. The new transformer S13—400 / 10±2×0.25% / 0.4

[0092] Design scheme: The cross section of the iron core winding is oval, and the shell type iron core is selected.

[0093] The ratio of the length to the short axis of the iron core is 1:1.5, the diameter of the small circle of the iron core is Φ155mm, the main stage of the iron core is thickened by 33mm, and the cross-sectional area of ​​the iron core is 280.006cm 2 . Core magnetic density Bm=1.546T, M0=255mm, Hw=400mm.

[0094] Winding structure: staggered, six magnetic balance groups.

[0095] High-voltage winding: It is a layered winding with a flattened structure, and the number of turns is 630 turns, 600 turns, and 570 turns. Wire gauge ZB—0.32.12×4. Each double magnetic...

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Abstract

The invention relates to a novel shell type transformer. The novel shell type transformer is a shell-type transformer which can be applied to large, medium and small transformers, and has a vertical transformer body and a high-voltage layered winding. The cost is equivalent to that of a core-type transformer, the sudden short circuit test passing rate is basically 100%, the structure is compact, lead installation is convenient, capacitance distribution is uniform, insulation is reliable, and lightning stroke resistance and overvoltage operation capability are high.

Description

technical field [0001] The present invention is a new type of transformer. It is an expansion of the application range of shell-type transformers and is suitable for shell-type transformers with large, medium and small capacities. Background technique [0002] Transformer is one of the most important power equipment used in power grid and power system. It is mainly composed of iron core and winding (also called coil). If classified according to the core and winding structure, the transformer can be divided into two types: core type and shell type. [0003] The basic structure of the core transformer is as follows figure 1 As shown (three-phase), the cross-section of the core column is circular, the placement method is vertical, and the cross-section of the coil is also circular. arrangement. The iron core column section is composed of multiple layers of iron core pieces with different sheet widths and different thicknesses. The three-phase five-column core type large tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/28H01F27/32H01F27/24
CPCH01F27/28H01F27/323H01F27/24
Inventor 孙崇山孙铭鸿高铭谣
Owner 孙崇山
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