Method for manufacturing corona resistant transposition winding wires

A technology of transposition winding and manufacturing method, applied to circuits, electrical components, insulated cables, etc., can solve problems such as temperature rise of transformers and power transmission equipment, influence on safe operation of transmission and transformation lines, interference of radio and communication lines, etc. Achieve uniform electric field, reduce electromagnetic pollution, and save active power loss

Active Publication Date: 2011-02-02
天津经纬电力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The generation of "corona" will cause power loss
Increase the temperature of transformers and power transmission equipment, and at the same time c...

Method used

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  • Method for manufacturing corona resistant transposition winding wires
  • Method for manufacturing corona resistant transposition winding wires

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Embodiment Construction

[0014] Below in conjunction with the accompanying drawings and preferred embodiments, the specific implementation, structure and features provided by the present invention are described in detail as follows:

[0015] Such as figure 1 As shown, the structure of the corona-resistant transposition winding wire includes: an enamelled flat wire core 1, a backing paper 2, and an insulating layer 4; An insulating layer 4 is provided on the outside of the enamelled flat wire core 1 as a whole; the feature is that a corona-resistant thin film layer 3 is provided between the enamelled flat wire core 1 and the insulating layer 4 .

[0016] The corona-resistant thin film layer 3 is a polyimide insulating thin film layer containing nanoscale inorganic compounds.

[0017] The specific steps of its preparation method include:

[0018] (1) The wire core is composed of 5-83 copper or aluminum enamelled flat wires to form two rows in which the wide surfaces are in contact with each other. Usu...

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PUM

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Abstract

The invention relates to a method for manufacturing corona resistant transposition winding wires, which comprises the following implementation steps: (1) arranging a wire core into two rows with mutually contacted broad-face by using 5-83 (odd number) enamelled rectangular copper or aluminum wires, transposing the wire core in the same turning direction along a narrow face on and under the two rows of enamelled wires according to the specified pitch so that each enamelled rectangular wire is positioned in one segment with the basically equal length to maintain resistance balance, and setting lining paper in the middle of a paper core; (2) performing single-layer overlapping outside the transposed enamelled rectangular wire core with a corona resistant insulation film; and (3) performing multi-layer continuous lapping on an external layer with electrical insulating paper or a mesh tape insulating material according to the voltage class requirement. In the invention, a polyimide insulation film layer containing a nanoscale inorganic compound is employed in the method, which increases resistance of the insulation layer on local discharge degradation, facilitates charge accumulation diffusion for rapid heat dissipation, plays a role of effectively resisting high-frequency pulse voltage and corona, and lowers temperature rise of a transformer and a reactor.

Description

technical field [0001] The invention relates to an electromagnetic wire application technology, in particular to a method for manufacturing a corona-resistant transposition winding wire for a dry-type transformer. Background technique [0002] Currently, a very strong electric field is generated around a conductor carrying a high voltage. If the electric field strength exceeds the breakdown strength of the gas or liquid medium around the conductor, the gas or liquid will be ionized, and severe partial discharge will appear. This is what is commonly referred to as the "corona phenomenon". The general performance is that under the high-voltage line and around the high-voltage transmission and transformation equipment, the sound can often be heard. "Corona" also often occurs in non-uniform electric fields and areas of high electric field strength. The generation of "corona" will cause power loss. It will increase the temperature of transformers and power transmission equipm...

Claims

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Application Information

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IPC IPC(8): H01B7/02H01B7/08H01B7/00H01B7/30
Inventor 董树林张国祥张金生袁卫国张龙刘志强
Owner 天津经纬电力科技有限公司
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