Application of vision measurements for modal analysis of wires for the purpose of overhead transmission lines monitoring

12th International Conference on Damage Assessment of Structures

Mendrok, Krzysztof^1 ; Dworakowski, Ziemowit^1 ; Holak, Krzysztof^1 ; Kohut, Piotr^1

AGH University of Science and Technology, Al. Mickiewicza 30, Kraków

30-059, Poland^1

关键词: Current flowing;    Dynamic performance;    Measurement and analysis;    Noncontact measurements;    Overhead transmission lines;    System vibrations;    Transmission power;    Vision measurement;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/842/1/012011/pdf
DOI  :  10.1088/1742-6596/842/1/012011

来源: IOP

【 摘 要 】

Overhead transmission power lines are still one of the crucial elements of electro-energetic system. There are obvious advantages of using overhead transmission in the distribution of electricity. The amount of energy transported through a power line is determined by the distance between the wire and the ground or other objects placed beneath it (eg. trees). This distance is not fixed and depends on the overhang of the wire. This, in turn, is determined by many factors such as ambient temperature, humidity, precipitation, the value of current flowing through the wire. In order to optimize the wires electrical load, the monitoring of that overhang is required. One way to measure it is the non-contact measurement by vision system. It has the advantage, that using high-speed cameras respectively it also allows for vibration measurement and analysis of dynamic performance. That is very important while the wires are susceptible to the influence of wind, and the resulting vibrations interfere with the correct measurement of the overhang. The paper presents the results of vision measurements of the system vibrations and modal analysis carried out on their basis. The study was conducted on a specially made laboratory stand.