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Power grid transmission line

A technology for power transmission lines and power grids, applied in the direction of power cables, power cables for overhead applications, circuits, etc., can solve the problems of increasing the weight of composite material mandrels, increasing the sag of overhead cables, and high density of glass fibers to achieve reduction Effect of unit weight, reduction of stiffness, and improvement of toughness

Inactive Publication Date: 2018-05-29
RONGCHENG POWER SUPPLY CO STATE GRID SHANDONG ELECTRIC POWER CO +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Some introduce glass fiber into the composite mandrel, and use the glass fiber composite material as the outer insulating layer of the composite mandrel. Although the insulation of the mandrel is improved, the density of the glass fiber is higher (about 50% higher than that of carbon fiber) ), which increases the weight of the composite mandrel, thereby increasing the sag of the overhead cable
Moreover, the composite mandrel with two-layer concentric circle structure has high rigidity and poor toughness, and it is easy to crack or break when the coil is wound.
Therefore, simply adding a glass fiber insulation layer to the carbon fiber composite mandrel is not an ideal solution

Method used

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Embodiment 1

[0027] Power grid transmission line, comprising a carbon fiber composite core and at least one layer of conductive outer layer formed by twisting and twisting more than six aluminum wires with a tile-shaped cross section; the carbon fiber composite core is composed of a carbon fiber center layer and a carbon fiber center layer The aramid fibers on the layer and the epoxy resin layer containing modified graphene are composed; the modified graphene is surface-modified by polyurethane.

[0028] The preparation method of the epoxy resin of modified graphene comprises the following steps: 1) graphene is dispersed in deionized water with ultrasonic wave, adjusts the pH value to 11, adds N,N-dimethylformamide and hydrazine hydrate, reacts After 12h, the reaction product obtained is washed to neutrality and dried to obtain a modified graphene precursor, wherein the mass ratio of graphene, amide compound and hydrazine hydrate is 1:300:10; 2) polyurethane is melted, and Add modified gra...

Embodiment 2

[0030] The power grid transmission line is composed of a carbon fiber composite core and at least one layer of conductive outer layer formed by twisting around and twisting more than four aluminum wires with a tile-shaped cross-section; the carbon fiber composite core is composed of a carbon fiber center layer and a carbon fiber center layer The aramid fibers on the layer and the epoxy resin layer containing modified graphene are composed; the modified graphene is surface-modified by polyurethane.

[0031] The preparation method of the epoxy resin comprising modified graphene comprises the following steps: 1) graphene is dispersed in deionized water by ultrasonic waves, the pH value is adjusted to 12, succinimide and hydrazine hydrate are added, after reacting for 24h, The obtained reaction product is washed to neutrality and dried to obtain a modified graphene precursor, wherein the mass ratio of graphene, amide compound and hydrazine hydrate is 1:800:15; 2) melt the polyurethan...

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Abstract

A power grid transmission line is composed of a carbon fiber composite core and at least one conductive outer layer formed by winding and stranding more than four conductive metal wires having the tile-shaped cross section, the carbon fiber composite core is composed of a carbon fiber central layer, aramid fibers coating the carbon fiber central layer and an epoxy resin layer containing modified graphene; and the modified graphene is subjected to surface modification by adopting polyurethane. The transmission line is longer in service life, the unit weight of the cable is reduced, and the distance between the towers in the conveying process can be increased; the toughness of the carbon fiber composite core is improved, the rigidity is reduced, and the curl performance of the carbon fiber composite core is improved.

Description

technical field [0001] The invention belongs to the field of molding composite materials, in particular to a composite core cable comprising a carbon fiber composite core, an aluminum conductor and a protective film and a preparation method thereof. Background technique [0002] In order to meet the increasing demand for electric energy around the world, power supply companies in various countries have increased their power generation capacity by increasing investment in power generation facilities. But at the same time, how to transmit the newly increased power generation capacity has become a new problem. The construction of new transmission lines is subject to major constraints such as environmental protection, urban planning, and investment scale. Therefore, it is important to improve the transmission capacity of existing transmission lines. A simpler and more effective method. [0003] The main factor limiting the increase in current in transmission lines is heat. Whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/04H01B7/17H01B7/18H01B7/28H01B9/00H01B13/00H01B13/22
CPCY02A30/14H01B7/04H01B7/17H01B7/1825H01B7/28H01B9/006H01B9/008H01B13/00H01B13/22
Inventor 魏爱华刘洋沙鑫张淼樊金岭隋晓辉姜朝清隋守荣许宏力郭芳车晨王志伟邹晓华
Owner RONGCHENG POWER SUPPLY CO STATE GRID SHANDONG ELECTRIC POWER CO
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