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A dry type high frequency transformer

A dry-type transformer and insulating layer technology, applied in the direction of fixed transformer or mutual inductance, transformer/inductor parts, transformer/inductor coil/winding/connection, etc. problems, to avoid gaps and cracks, solve creeping discharges, and reduce partial discharge levels

Active Publication Date: 2020-09-08
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem in the prior art that the dry insulating structure composed only of epoxy resin cannot meet the long-term operation reliability requirements of high-frequency transformers, and to provide a new type of winding with an insulating structure

Method used

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  • A dry type high frequency transformer

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Embodiment 1

[0036] The winding with an insulating structure provided in this embodiment sequentially includes a first insulating layer, a first transition layer, a coil, a second transition layer and a second insulating layer. The coil is made of ionic conductor material as the wire, and the turns of the coil are separated by insulating material. DMD insulating composite material can be selected. The first insulating layer and the second insulating layer are made of cast epoxy resin, and the transition layer one And the transition layer two is made of silicone rubber sheet.

[0037] By setting a transition layer between the coil and the insulating layer, it can play a buffer role, reduce the phenomenon of air gaps and cracks at the interface between the insulating layer and the coil, and avoid discharge along the surface, thereby improving the insulation performance and reducing the level of partial discharge. The insulating elastic material is the preferred transition layer material.

Embodiment 2

[0039] The winding with the insulating structure provided by this embodiment is structurally the same as the winding with the insulating structure provided by the embodiment, except that the transition layer 2 of this embodiment is made of electrostatic shielding material semiconductor crepe paper, so that the transition layer 2 It can not only play a certain buffering role, but also shield the electric field outside the coil, achieve the effect of a uniform electric field, further reduce the level of partial discharge, and thus prevent the occurrence of breakdown and short circuit.

Embodiment 3

[0041] The winding with an insulating structure provided in this embodiment sequentially includes a first insulating layer, a first transition layer, a coil, a second transition layer, and a second insulating layer. Wherein, both transition layer 1 and transition layer 2 are made of electrostatic shielding materials.

[0042] By selecting the electrostatic shielding material as the material of transition layer 1 and transition layer 2, the electric field inside and outside the coil can be well shielded, making this winding with an insulating structure more suitable for high-voltage winding and has better insulation performance. Minimize the partial discharge level and ensure that the winding with insulating structure is safe and reliable during long-term operation.

[0043] In this embodiment, a semiconductor self-adhesive tape is used as the electrostatic shielding material, a silicon rubber plate made of elastic insulating material is used as the transition layer, and an ion c...

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Abstract

The invention belongs to the technical field of a dry-type high-frequency transformer, and particularly relates to the dry-type high-frequency transformer which can be used for improving insulation performance and reducing local discharging quantity of the transformer and is provided with an insulation structure. By additionally arranging a transition layer having a buffer effect between the winding coil and the insulation layer, favorable linkage between the winding and the insulation layer is achieved, phenomena such as gap and crack between the insulation layer and the winding in the priorart are prevented, and the local discharging level can be effectively reduced; and moreover, an insulation elastic material and an electrostatic shielding material are preferably used as transition layers, a potential risk of large local discharging quantity of the insulation layer at a high-voltage side and a low-voltage side is prevented, the insulation performance of the dry-type high-frequencytransformer is greatly improved, the service lifetime of the dry-type high-frequency transformer is greatly prolonged, and the long-term running reliability of a power electronic transformer device is improved.

Description

technical field [0001] The invention belongs to the technical field of dry-type transformers, and in particular relates to a winding with an insulating structure capable of improving the insulation performance of a dry-type high-frequency transformer and reducing the partial discharge of the transformer. Background technique [0002] Power Electronic Transformer (PET for short) is a new type of transformer, which converts and controls energy through power electronic devices and power electronic conversion technology. Compared with traditional transformers, power electronic transformers are smaller in size and lighter in weight, and have the advantages of saving materials and energy. Power electronic transformers have broad application prospects in smart grids. They can not only provide flexible access solutions for microgrids, distributed energy sources and renewable energy sources; , safety, flexibility and economical requirements; and can realize multi-port AC and DC powe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/32H01F27/28H01F19/04
CPCH01F19/04H01F27/288H01F27/323H01F27/325
Inventor 邓占锋赵国亮乔光尧王东任西周康伟周哲徐云飞李卫国雷晰苏铁山石秋雨曾洪涛
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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