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Method, device and system for testing mechanical properties of in-service carbon fiber composite core wires

A test method, carbon fiber technology, applied in the direction of measuring devices, instruments, etc., can solve problems such as increased risk of operational uncertainty

Active Publication Date: 2022-07-12
STATE GRID ZHEJIANG ELECTRIC POWER
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  • Abstract
  • Description
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Problems solved by technology

In the process of operation, the carbon fiber composite core conductor mandrel inevitably ages, and with the increase of the service life, the risk of operational uncertainty caused by aging gradually increases

Method used

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  • Method, device and system for testing mechanical properties of in-service carbon fiber composite core wires
  • Method, device and system for testing mechanical properties of in-service carbon fiber composite core wires
  • Method, device and system for testing mechanical properties of in-service carbon fiber composite core wires

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Embodiment Construction

[0059] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0060] The mechanical properties of carbon fiber composite core wires are different from ordinary steel-cored aluminum stranded wires, which are determined by their material properties. The linear expansion coefficient of the carbon fiber composite core is 2.0×10-6 / ℃, the linear expansion coefficient of the steel core is 11.5×10-6 / ℃, and the linear expansion coefficient of the aluminum wire is 23×10-6 / ℃. The linear expansion coeffici...

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Abstract

The invention provides a method, device and system for testing the mechanical properties of an in-service carbon fiber composite core wire. The method includes heating the carbon fiber composite core wire to obtain the stress and strain of the carbon fiber composite core wire at multiple temperature points, and measuring the stress of the wire. and the strain are plotted and normalized to obtain the stress-strain curve of the carbon fiber composite core wire. The invention realizes the mechanical property test of the in-service carbon fiber composite core wire, and provides a basis for evaluating the high-temperature sag characteristic of the in-service carbon fiber composite core wire line.

Description

technical field [0001] The invention relates to the technical field of overhead transmission wires, and more particularly, to a method, device and system for testing the mechanical properties of an in-service carbon fiber composite core wire. Background technique [0002] Carbon fiber composite core conductor is a new type of overhead transmission line conductor. Compared with the existing steel-cored aluminum stranded conductor, it has the advantages of light weight, small sag at high temperature, large tensile force and large current carrying capacity. The application of carbon fiber composite core conductors in transmission lines is increasing. As of December 2017, the State Grid Corporation of China has more than 400 overhead transmission lines using carbon fiber composite core conductors, with a line length of more than 2,900 kilometers and a total of more than 12,800 conductors. kilometer. At the same time, the service life is getting longer and longer. The first carb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D21/02
CPCG01D21/02
Inventor 毛南平卞荣陈科技孙永军陈赛慧张琳琳李国强
Owner STATE GRID ZHEJIANG ELECTRIC POWER
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