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Membrane-packaged rectangular stranded conductor and manufacture method

A wire and rectangular technology, which is applied in the field of wire and preparation for dry-type air-core smoothing reactor coils, can solve problems such as large eddy current loss, burnt coils, and unsafe system operation, and achieve good short-circuit resistance and strong short-circuit resistance , The effect of compact wire structure

Inactive Publication Date: 2009-10-14
CHINA XD ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing dry-type air-core smoothing reactor coils use film-wrapped round aluminum wires or rectangular stranded wires, but when the transmission capacity is large, the harmonic components also increase. Ordinary film-wrapped round aluminum wires have a large eddy current loss , the temperature rise of the coil is very high, and it will burn the coil in serious cases, which is not safe for the system operation
Although the rectangular stranded wire can solve the problem of eddy current loss caused by harmonic current, because there is air in the gap between the single wires in the rectangular stranded wire, when the voltage level is high, generally exceeding ±500kV, the air in the gap will Discharge will occur and even break down the insulation layer
And when winding, it is easy to jump wires

Method used

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  • Membrane-packaged rectangular stranded conductor and manufacture method
  • Membrane-packaged rectangular stranded conductor and manufacture method
  • Membrane-packaged rectangular stranded conductor and manufacture method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Such as figure 1 As shown, the film-wrapped rectangular stranded wire has a rectangular cross-section and is formed by twisting two layers of multiple round aluminum wires 1 . The outer diameter of each round aluminum wire is covered with a wire coating 2, and the length and resistance of each wire are basically equal; the gap between the twisted single round aluminum wires is filled with thermoplastic resin glue 4 of the same heat-resistant grade, and thermoplastic resin glue 4 Epoxy resin glue can be used, and the rectangular stranded wire filled with epoxy resin glue is wrapped with glue insulation 5 first, then wrapping insulation 3, and finally wrapping polyester non-woven fabric 6 outside the wrapping insulation 3.

[0026] The preparation method of the film bag rectangular stranded wire of the present invention comprises the following steps:

[0027] 1) Wrap a single round aluminum wire 1 with polyester film or high-temperature-resistant insulating varnish or hi...

Embodiment 2

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0036] Such as figure 2 As shown, the film-wrapped rectangular stranded wire has a rectangular cross-section and is formed by twisting three layers of multiple round aluminum wires 1 . The outer diameter of each round aluminum wire is covered with a wire coating 2, and the length and resistance of each wire are basically equal; the gap between the twisted single round aluminum wires is filled with thermoplastic resin glue 4 of the same heat-resistant grade, and thermoplastic resin glue 4 Epoxy resin glue can be used, and the rectangular stranded wire filled with epoxy resin glue is wrapped with glue insulation 5 first, then wrapping insulation 3, and finally wrapping polyester non-woven fabric 6 outside the wrapping insulation 3.

[0037] The preparation method of the film bag rectangular stranded wire of the present invention comprises the ...

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Abstract

The invention discloses a membrane-packaged rectangular stranded conductor and a manufacture method. The method comprises the following steps: 1) membrane-packaged conductors are formed by packaging single circular aluminum wire with polyester film; 2) a plurality of film-packaged conductors are stranded together and shaped into rectangular sectional planes, wherein, the conductors leastways comprise two layers of many circular aluminum wires, and the length of each conductor is basically equal to resistance; 3) the stranded conductors with rectangular sectional planes are impregnated with a thermoplastic resin adhesive groove so that thermoplastic resin adhesive is full filled with apertures among each single circular aluminum wire and all the single circular aluminum wires are adhered together; 4) insulation materials are full packaged outside of the stranded conductors with rectangular sectional planes, wherein, the stranded conductors are impregnated with the thermoplastic resin adhesive groove, so that the resin adhesive is packaged; and 5) polyester non-woven fabric is selectively laid outside of the full packaged insulation materials, and the apertures among each single circular aluminum wire are filled with thermoplastic resin adhesive and solidified by baking after coiling reactor winding.

Description

technical field [0001] The invention relates to a wire for a dry-type air-core smoothing reactor coil and a preparation method thereof, in particular to a film-wrapped rectangular stranded wire and a preparation method thereof. Background technique [0002] With the continuous development of my country's power industry, the increase of large-capacity cross-regional long-distance DC transmission lines has put forward more stringent requirements for dry-type air-core smoothing reactors. Most of the existing dry-type air-core smoothing reactor coils use film-wrapped round aluminum wires or rectangular stranded wires, but when the transmission capacity is large, the harmonic components also increase accordingly. Ordinary film-wrapped round aluminum wires have a large eddy current loss , The temperature rise of the coil is very high, and in severe cases, the coil will be burned, which is not safe for the system operation. Although the rectangular stranded wire can solve the prob...

Claims

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Application Information

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IPC IPC(8): H01B7/08H01B7/02H01B3/42H01B3/40H01F41/12
Inventor 宓传龙汪德华万锋涛陈荣
Owner CHINA XD ELECTRIC CO LTD
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