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Novel core-type transformer with windings arranged in staggered mode

A transformer and interleaved technology, applied in the field of new transformers, can solve problems such as increasing creepage distance along the surface, doubling ultra-high voltage transformers, and preventing transformer oil from flowing

Pending Publication Date: 2020-05-12
孙崇山
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most core-type and shell-type transformers with staggered windings have extremely short windings. When outer corner rings are used, the entire winding will be covered, the transformer oil cannot flow, and the temperature rise of the winding will reach an unacceptable level.
[0019] Secondly, for heart-type transformers with staggered windings, including shell-type transformers, if the anti-angular ring is cancelled, the creepage distance along the surface must be increased by increasing the insulation distance between the ends of the two windings, resulting in an increase in cost. The most conservative for transformers below 35KV It is estimated that it is also greater than 40%, and the ultra-high voltage transformer will double

Method used

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  • Novel core-type transformer with windings arranged in staggered mode
  • Novel core-type transformer with windings arranged in staggered mode
  • Novel core-type transformer with windings arranged in staggered mode

Examples

Experimental program
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Effect test

example 1

[0114] Example 1. Select S13-400 / 10±2×0.25% / 0.4 transformer as the implementation plan. The reason for the choice is that distribution transformers are extremely sensitive to cost control. In the industry, the cost is generally reduced by sacrificing the sudden short-circuit capability. Therefore, the core and winding cross-sections of distribution transformers are non-circular, so the cost of new transformers is comparable to that of ordinary non-circular cross-sections. Compared with the core transformer, the new type of transformer can reduce the percentage of cost more convincingly under the premise of ensuring the short-circuit capability. Compared with the most common set of drawings in the industry at present, the model of the control group is S13-400 / 10±2×0.25% / 0.4, the iron core and winding section are oval, core transformer, and concentric winding.

[0115] Example 1, S13—400 / 10±2×0.25% / 0.4

[0116] National standard: load loss Pk=4200W

[0117] No-load loss P 0 =...

example 2

[0134] Example 2. HTSSPZ——6300 / 11 electric furnace transformer

[0135] 1. Ferroalloy furnace transformer, capacity 6300KVA, three-phase 11-stage on-load voltage regulation, high voltage 10KV, low voltage 122V-142V, connection group Dd11, cooling method is strong oil circulation water cooling, insulation level LI85AC35 / AC5.

[0136] 2. For the electric furnace transformer of the comparison group, the iron core and winding section are circular, the windings are arranged in a staggered manner, the insulation distance between the high-voltage coil and the low-voltage coil is 25mm, and the distance between the low-voltage coil and the iron yoke is 35mm (pressurized plate).

[0137] 3. A new type of electric furnace transformer with a U-shaped flat-bottom screen. The cross-section of the iron core and windings is oblong. The windings are arranged in a staggered manner.

[0138] The high-voltage coil adopts a U-shaped flat-bottom enclosure, and each high-voltage coil end uses a U-sh...

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Abstract

The invention relates to a novel transformer. Structural advantages of an existing shell-type transformer and an existing core-type transformer are integrated, so a shell-type transformer and a core-type transformer can be completely replaced. The cost is greatly reduced, and the percent of pass of sudden short circuit tests is theoretically 100%. A transformer winding is good in cooling effect, high in overload capacity, large in limit capacity and convenient to transport, and the limit capacity is superior to that of a shell type transformer. When vertical transportation is inconvenient, thetransformer body can be transported horizontally, and the transportation height is reduced. The capacitor is compact in structure, small in appearance size, light in overall weight, uniform in capacitor distribution, reliable in insulation and high in lightning stroke resistance and operation overvoltage resistance, and leads are convenient to install.

Description

technical field [0001] The invention is a new type of transformer, which is another form of transformer besides the shell type transformer and the traditional core type transformer. Combining the structural advantages of the current shell-type transformer and core-type transformer, it can completely replace the traditional shell-type and core-type transformers. The invention also includes a new type of insulating part for insulating and protecting the winding ends of the transformer, which is mainly used in core transformers and shell transformers with interlaced windings, and can also be used in concentric transformers. Due to the invention of this new type of insulating component, a brand new winding end insulation structure and insulation protection method has been produced, which greatly improves the electric field distribution at the end of the high voltage winding, reduces the distance of the main magnetic flux leakage channel, and reduces the cost of the transformer. ...

Claims

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Application Information

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IPC IPC(8): H01F27/24H01F27/28H01F27/30H01F27/32H01F30/12
CPCH01F27/24H01F27/28H01F27/2823H01F27/306H01F27/324H01F30/12
Inventor 孙崇山
Owner 孙崇山
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