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

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: 2021-03-26
STATE GRID ZHEJIANG ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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

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Embodiment Construction

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0060] The mechanical properties of carbon fiber composite core conductors are different from ordinary steel-reinforced 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 coefficient of the carbon...

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Abstract

The invention provides a method, a device and a system for testing mechanical properties of an in-service carbon fiber composite core wire. The method comprises the steps: carrying out the heating ofa carbon fiber composite core wire, obtaining the stress and strain of the carbon fiber composite core wire at a plurality of temperature points, drawing the stress and strain of the wire, carrying out the normalization processing, and obtaining a stress-strain curve graph of the carbon fiber composite core wire. The mechanical properties of the in-service carbon fiber composite core wire is tested, and a basis is provided for high-temperature sag characteristic evaluation of the in-service carbon fiber composite core wire line.

Description

technical field [0001] The invention relates to the technical field of overhead power transmission wires, and more specifically, to a method, device and system for testing the mechanical properties of in-service carbon fiber composite core wires. Background technique [0002] Carbon fiber composite core wire is a new type of overhead transmission line wire. Compared with the existing steel-reinforced aluminum stranded wire, it has the advantages of light weight, small high-temperature sag, large tensile force, and large current-carrying capacity. Carbon fiber composite core conductors are used more and more in transmission lines. As of December 2017, the State Grid Corporation of China has used carbon fiber composite core conductors in more than 400 overhead transmission lines. kilometer. At the same time, the service life is getting longer and longer. The first carbon fiber composite core conductor in China was erected in 2006, more than 15 years ago. During the operation...

Claims

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Application Information

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Patent Type & Authority Applications(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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