Multi-dimensional acquisition and evaluation method of corrosion degree of old overhead ground wires

Abstract

A multi-dimensional acquisition and evaluation method for the corrosion degree of old overhead ground wires. The method uses a multi-dimensional acquisition and evaluation device to collect multi-dimensional corrosion degrees of the corrosion characteristics of old ground wires, and conducts object analysis on the data collected in multiple dimensions. , to evaluate the overhead ground wire. One-dimensional is the real-time acquisition and recognition of the two corners of the image, and image recognition is performed through two miniature cameras facing the cable to generate a comprehensive surround image, reflecting the rust or external damage on the cable; the two-dimensional is the line The change dimension of the pH value of the cable surface, through the acid-base test module to analyze the influence of the pH change on the time axis on the corrosion degree of the cable; the three-dimensional dimension is the line sag of the overhead ground wire, through the length / angle test module to measure the line from the beginning to the end long.

Description

technical field [0001] The invention relates to a multi-dimensional acquisition and evaluation method for the corrosion degree of old overhead ground wires, belonging to the technical field of ground wire evaluation. Background technique [0002] Overhead ground wires are an important device to protect transmission lines from lightning attacks. Overhead ground wires can reduce lightning hazards, improve line safety, and reduce line tripping rates. In addition, in recent years, with the development and large-scale application of optical fiber composite overhead ground wire (OPGW) technology, more and more overhead ground wires have multiple functions such as dispatching and information communication. The role of safe, stable and reliable operation continues to be highlighted. [0003] In addition, a large number of accident analyzes have found that transmission lines are mostly damaged under the action of strong winds, thunderstorms or repeated ice loads. In fact, due to th...

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Problems solved by technology

This coupled load effect not only seriously affects the stable operation of the power grid, but also often produces relatively large secondary disasters, causing serious losses to the country and people's lives and properties.

[0004] In addition, the transmission line has many points and wide areas, and the operation status of the old ground wires in service in the power grid is generally unclear. Quantitative data on the impact of local defects on the overall bearing capacity of ground wires are basically blank

In addition, at present, the operating units basically rely on visual inspection for the state evaluation of overhead ground wires. The detection method is single, subjective, and lacks quantitative evaluation criteria, which leads to difficulties in predicting the remaining life of old ground wires and limited technical renovation and overhaul. Funds are often not invested in the worst-case and most urgently needed routes

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