Winding wire for SF6 gas insulated transformer

A technology of combining wires and gas insulation, applied in the field of transformers, can solve the problems of high price and achieve the effect of good mechanical strength and good thermal conductivity

Active Publication Date: 2013-02-06
WUXI TOLY ELECTRIC WORKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In my country, SF6 gas-insulated transformers are rarely used at present, and the winding wires for SF6 gas-insulated transformers basically rely on imports, which are expensive.

Method used

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  • Winding wire for SF6 gas insulated transformer

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0012] Such as figure 1 As shown, the present invention is mainly composed of parts such as aluminum flat wire conductor 1, PET film insulation layer 2 of single aluminum flat wire, PET film insulation layer 3 of aluminum combined wire.

[0013] The insulation strength of the main insulation between the high and low voltage windings and between the windings and the ground is mainly determined by the insulation strength of SF6 gas, and SF6 is highly dependent on the uniformity of the electric field, so the electric field strength in the gas must be strictly controlled. A highly airtight plastic film with high mechanical strength and insulating capacity is used as the insulating material.

[0014] During production, the aluminum flat wire conductor 1 is formed by extrusion equipment according to specifications, and the outer surface of the aluminum flat wire con...

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Abstract

The invention relates to a winding wire (PET film and aluminum combined wire) for an SF6 gas insulated transformer, which comprises aluminum flat wire conductors, PET film insulated layers of individual aluminum flat wires, PET film insulated layers of aluminum combined wires; individual PET film bands outside the aluminum flat wire conductors are overlapped and wound to form the PET film insulated layers of the individual aluminum flat wires; and a plurality of layers of PET film band outside the PET film insulated layers of the individual aluminum flat wires are overlapped and wound to form the PET film insulated layers of the aluminum combined wires. According to the invention, plastic films with very high mechanical intensity, insulation capacity and high sealing performance serve as an insulation material, and the PET film and aluminum combined wire made of the insulation material is anti-high temperature, voltage resistant and good in mechanical intensity and heat conduction performance.

Description

technical field [0001] The invention discloses a winding wire for an SF6 gas insulated transformer, specifically a PET film-wrapped aluminum composite wire used in the SF6 gas insulated transformer, and belongs to the technical field of transformers. Background technique [0002] At present, transformers are mainly developing in two aspects: one is to develop towards extra large and ultra-high voltage, and the other is to develop towards energy saving, miniaturization, low noise, high impedance, and explosion-proof. The former are generally used in large-scale power stations or power transmission; the latter are mainly small and medium-sized products. With the development of urbanization in China, the population of big cities is more dense, there are many high-rise buildings, the power consumption is increasing sharply, and the number of transformers is also increasing. The traditional large-capacity oil-immersed transformer has a large amount of oil. Once it catches fire du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/00H01B7/02
Inventor 陆炳兴戴涛辛达春
Owner WUXI TOLY ELECTRIC WORKS
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