Abstract
The advance in remote sensing techniques, especially the development of LiDAR scanning systems, allowed the development of new methods for power line corridor surveys using a digital model of the powerline and its surroundings. The advanced diagnostic techniques based on the acquired conductor geometry recalculation to extreme operating and climatic conditions were proposed using this digital model. Although the recalculation process is relatively easy and straightforward, the uncertainties of input parameters used for the recalculation can significantly compromise such recalculation accuracy. This paper presents a systematic analysis of the accuracy of the recalculation affected by the inaccuracies of the conductor state equation input variables. The sensitivity of the recalculation to the inaccuracy of five basic input parameters was tested (initial temperature and mechanical tension, elasticity modulus, specific gravity load and tower span) by comparing the conductor sag values when input parameters were affected by a specific inaccuracy with an ideal sag-tension table. The presented tests clearly showed that the sag recalculation inaccuracy must be taken into account during the safety assessment process, as the sag deviation can, in some cases, reach values comparable to the minimal clearance distances specified in the technical standards.
Highlights
As we can see from the previous section, there are several ways how to use the digital see from the previous section, there scanning are several ways how to use the digital modelAs ofwe thecan power line acquired by aerial for safety assessment
Current advances in remote sensing methods allowed the development of new progressive methods for the power line corridor safety assessment using a digital model of the power line and its surroundings
An important factor influencing the usability of such remote sensing-based assessment methods is the accuracy of the digital model acquired by the scanning and accuracy of the subsequent recalculation of the conductor geometry to a new operation state
Summary
This paper is aimed at detailed analysis of the impacts of input inaccuracies that may affect the conductor geometry recalculation, evaluating the practical usability of such conductor geometry recalculations for power line inspections. The purpose of this paper is to point out the most problematic impacts of input data inaccuracies and show the limits of assessment methods based on the recalculation of the conductor geometry
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