Analysis of power lines span geometry based on TLS measurements

Abstract

The inventory measurements of utility infrastructure are crucial issues in the field of engineering geodesy. Secure usage of power lines requires to monitor their geometry. According to classical approach to measurements of geometry of overhead power lines, it usually allows only to measure directly. Geodetic methods cannot be applied due to measuring limitations (lack of an appropriate area to conduct a measurement). Currently in engineering geodesy it is becoming more common to use methods of laser scanning as well as Unmanned Aerial Photogrammetric Survey. In the Paper, the procedure of determining of an overhead power line’s geometry is presented on the example of an one span measured with Terrestrial Laser Scanning methods. Field measurements were conducted by using laser scanner. Afterwards the point cloud was processed in order to receive the geometry of conductor. Finally, results were presented is tabular and graphic form.

A survey of sag monitoring methods for power grid transmission lines

“…In [24], a terrestrial laser scanner Leica Scan Station P30 was used to extract the geometry of an overhead line for a span of 220 kV power line with a range of 300 m from the scanner. Point cloud data were obtained via scanning and then processed to extract the geometry, including the sag.…”

Security of infrastructural linear objects by using three-dimensional laser scanning technology

“…Remote methods include the magnetometric method (determines the defect of the metal), the optical method based on video recording (control of the deviation of the top of the support, measuring the size of the phase wires), as well as thermal imaging, measuring defects using robotic total stations, laser scanning [1][2][3][4][5][6][7][8][9]. The contact method is the tensometric method (the study of icy-wind effects), the use of capacitive sensors (monitoring the presence and thickness of the ice wall), inclinometers (for example, Nivel 210, Nivel 220), which make it possible to determine the inclination of the support from the vertical axis [10][11][12][13].…”