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Transmission conductor coated with inorganic/polymer composite material and preparation method of conductor

A technology for power transmission wires and composite materials, which is used in the manufacture of cables/conductors, power cables with shielding layers/conducting layers, circuits, etc. , Optimize the effect of electromagnetic environment

Inactive Publication Date: 2013-03-13
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One is pure ZnO / polymer composite material, which does not have nonlinear dielectric properties, but because the ZnO filler can block corona, it can improve the corona aging resistance of the material, but the breakdown strength will decline

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The voltage applied to the transmission wire is ±800kV, and the wire selection is LGJ-6×630 / 45.

[0034] ZnO, Bi in inorganic ceramic filler raw materials 2 o 3 , MnO 2 、Co 2 o 3 The weight percentage of the powder is 95:1:0.5:1. After ball milling and mixing, sintering at 900° C. for 6 hours to obtain ZnO varistor ceramic powder with a particle size of about 40 microns. Use heptane to dissolve normal 705 silicone rubber, the mass ratio of heptane and silicone rubber is 1:1, and use mechanical stirring with increased torque to mix. The required mixing volume ratio of silicone rubber and ZnO varistor ceramic powder is 6: 4. The mixture was fully stirred for 60 minutes.

[0035] The mixture is applied to the transmission wire by spraying method, and the application thickness is 0.1mm. Allow to cure at room temperature for 8 hours.

Embodiment 2

[0037] The voltage applied to the transmission wire is ±800kV, and the wire selection is LGJ-6×720 / 50.

[0038] ZnO, Bi in inorganic ceramic filler raw materials 2 o 3 , MnO 2 、Co 2 o 3 The weight percentage of the powder is 95:1:0.5:1. After ball milling and mixing, sintering at 1000° C. for 4 hours to obtain ZnO varistor ceramic powder with a particle size of about 60 microns. Use heptane to dissolve normal 705 silicone rubber, the mass ratio of heptane and silicone rubber is 1:2, and use mechanical stirring with increased torque to mix. The required mixing volume ratio of silicone rubber and ZnO varistor ceramic powder is 9.5: 0.5. The mixture was fully stirred for 30 minutes.

[0039] The mixture is applied to the transmission wire by spraying method, and the application thickness is 0.8mm. Allow to cure at room temperature for 24 hours.

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Abstract

The invention relates to a transmission conductor coated with an inorganic / polymer composite material and a preparation method of the conductor, which belong to the technical field of electromagnetic environment protection of a power system transmission line. The transmission conductor consists of a steel-cored aluminum stranded wire and a ZnO voltage-sensitive ceramic / polymer composite material coating coated on the steel-cored aluminum stranded wire; ZnO voltage-sensitive ceramic is prepared from ZnO powder, Bi2O3 powder, MnO2 powder and Co2O3 powder which are subjected to the procedures of mixing, sintering and crushing; the weight ratio of ZnO to Bi2O3 to MnO2 to Co2O3 is equal to 95 to 1 to 0.5 to 1; the grain size of the crushed ZnO voltage-sensitive ceramic powder is 10-100 microns; and a polymer material is 705 silicon rubber. By virtue of the transmission conductor, an electric field at the surface of a polar conductor is effectively equalized, and corona is effectively restrained, so that a radio interference value is reduced, and an electromagnetic environment of a direct-current transmission line is optimized. An overhead line structure is designed again according to the transmission conductor disclosed by the invention, so that the width of a transmission corridor can be reduced.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic environment protection for power system transmission lines, and relates to a transmission wire coated with a ZnO pressure-sensitive ceramic / polymer composite material. Background technique [0002] The corona phenomenon of high-voltage transmission lines is a key technical issue that needs to be considered in engineering design, construction and operation. On the one hand, corona will cause power loss and increase the cost of power transmission. On the other hand, the radio interference, audible noise and space ion flow generated by corona will affect the surrounding electromagnetic environment. With the continuous development of the economy and the enhancement of people's environmental awareness, electromagnetic environmental problems have attracted more and more attention, especially in UHV DC projects, due to the increase in voltage levels, electromagnetic environmental problems have be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B9/00H01B9/02H01B13/22
Inventor 胡军余占清李敏何金良曾嵘戴梦婷高雷谢竟成田丰刘磊李锐海张波季一鸣
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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