Analytical models of movement of wires of air high-voltage power transmission lines
https://doi.org/10.30724/1998-9903-2022-24-4-154-164
Abstract
The article PURPOSE with the problem of monitoring the state of high-voltage overhead power lines in order to ensure uninterrupted and reliable supply of consumers with electricity. METHODS. As parameters of the state, the sag, the tensile force and the mass per unit length of the wire hanging in the span are defined. IT IS STRESSED that a complete picture of the state of an overhead line can be established by determining the spectral composition of the wire vibrations using mounted automated multi-parameter sensors with accelerometers as sensors. It is shown that the currently used dynamic models for describing the motion of a wire as a pendulum and as a tightly stretched string are not complete enough to represent the vibrations of the wire in all three spatial coordinates, do not cover vibrations with odd harmonics and symmetrical vibrations. A system of equations has been OBTAINED that makes it possible to describe the spatial oscillations of the wire along all three axes, taking into account the difference in heights of the wire suspension points. IT IS SHOWN that the analysis of the higher harmonics of the spectrum of vibrations of the wire makes it possible to determine all the main mechanical parameters of the wires of overhead power lines.
Keywords
monitoring of the state of high-voltage overhead power transmission lines,
models of wire oscillations,
spatial coordinates,
higher harmonics of the spectrum of oscillations
Supporting agencies: The research work was carried out under the financial support of the Ministry of Science and Higher Education within the scope of the state Research and Development task no. 075-03-2022-151 of 14.01.2022 "Distributed automated systems of monitoring and diagnostics for technical condition of overhead power lines and substations based on broadband data transmission technology through power lines and the industrial Internet of Things" .
About the Author
D. A. Yaroslavsky
Kazan State Power Engineering University
Russian Federation
Russian Federation
Danil A. Yaroslavsky
Kazan
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Review
For citations:
Yaroslavsky D.A. Analytical models of movement of wires of air high-voltage power transmission lines. Power engineering: research, equipment, technology. 2022;24(4):154-164. (In Russ.) https://doi.org/10.30724/1998-9903-2022-24-4-154-164
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