Computational analysis of power transmission line steel structures according to modern regulatory and technical documents
https://doi.org/10.52170/1815-9265_2022_63_86
Abstract
Experience in the operation of power lines has shown that in addition to the breakage of wires and cables, the destruction of individual elements of the supports is possible as a result of those dynamic effects that act on the structure during the entire period of operation. Normative and technical documents for the calculation of such structures have undergone a number of changes in the direction of increasing loads, design coefficients, etc. However, it is still not uncommon for the construction of power transmission lines according to standard series developed in the middle of the 20th century, and not meeting the requirements of the current standards.
The article analyzes the changes that have occurred in the normative and technical documents, in the calculation of ice, wind and the elements of power lines themselves. Thus, the weight of ice on wires increased by 3 times per linear meter, the thickness of the ice wall at a height of 10 m increased by 2 times, and the standard wind pressure by 1.5 times compared to the requirements that were in force in the middle of the 20th century.
The analysis of the stress state of three different tower-type supports, modeled in the SCAD software according to standard series, but calculated according to the current regulatory documents, was carried out. The supports differ from each other in height, type (intermediate and anchor-angle), wind and weight span, wind and ice areas, as well as in the types of sections of structural elements. The calculation showed that the majority of the structural elements of the supports do not provide the ultimate flexibility of the elements. Thus, in order to meet the reliability requirements of structures, it is necessary to replace the sections of the elements, which in turn leads to an increase in the total mass of the transmission line.
The results of the calculations performed are planned to be used for further research in the field of improving the reliability, durability and efficiency of steel pylons for power transmission lines.
About the Authors
A. A. Novoselov
Siberian Transport University
Russian Federation
Russian Federation
Alexey A. Novoselov – Associate Professor of the Buildings, Building Constructions and Materials Department, Candidate of Engineering
Novosibirsk
N. S. Pichkurova
Siberian Transport University
Russian Federation
Russian Federation
Natalia S. Pichkurova – Associate Professor of the Buildings, Building Constructions and Materials Department, Candidate of Engineering
Novosibirsk
References
1. Shevchenko N. Yu. Improving the efficiency of reconstructed overhead power lines subject to extreme weather effects: specialty 05.09.03 Electrical complexes and systems: dissertation for the degree of candidate of Engineering. Saratov; 2011. 163 p. (In Russ.).
2. Nazim Ya. V., Leshchenko A. A., Kostin V. V. Comparative analysis of approaches to determining climatic loads on overhead lines on the example of the Crimean Power Plant. Metal structures. 2010;16(1):61–74. (In Russ.).
3. Nazim Ya. V., Leshchenko A. A., Kostin V. V. Implementation of new developments of normative documentation in the sphere of electric networks climatic provision in practical calculations. Bulletin of the Donbas National Academy of Life and Architecture. 2009;1:22–25. (In Russ.).
4. Gorokhov E. V., Kazakevich M. I., Turbin S. V., Nazim Ya. V. Wind and ice effects on overhead power lines. Edited by E. V. Gorohova. Donetsk; 2005. 348 p. (In Russ.).
5. Gorokhov E. V., Nazim Ya. V., Vasylev V. N., Leshchenko A. A. Forecasting and prevention of accidents on overhead power lines under the action of extreme ice-wind loads. Efficiency of energy construction and operation in Ukraine. Makeevka: Donbass National Academy of Civil Engineering and Architecture; 2008. Р. 54–65. (In Russ.).
6. Efimov E. N., Timashova L. V., Yasinskaya N. V. Causes and nature of damage to components of overhead power lines with a voltage of 110–750 kV in 1997-2007. Energy of a single network. 2012;(5):32–41. (In Russ.).
7. Gorokhov E. V., Shapovalov S. N., Udod E. I. Improving the reliability and durability of electric grid structures. Edited by E. V. Gorokhov. Kyiv: Tekhnika; 1997. 284 p. (In Russ.).
8. Gorokhov E. V., Kazakevich M. I., Shapovalov S. N., Nazim Ya. V. Aerodynamics of power grid structures. Edited by E. V. Gorohov, M. I. Kazakevich. Donetsk; 2000. 336 p. (In Russ.).
9. Barg I. G., Edelman V. I. Overhead power lines: Issues of operation and reliability. Moscow: Energoatomizdat; 1985. 248 p. (In Russ.).
10. Gorokhov E. V., Bakaev S. N., Nazim Ya. V. Analysis of the causes and consequences of accidents at sections of the 330 kV overhead line Dzhankoy MES of the Crimean electric power system of NPC Ukrenergo. Metal constructions. 2010;16(2):81–97. (In Russ.).
11. Electric installation rules. Approved by order of the Ministry of Energy of the Russian Federation dated July 8,2002 No. 204: introduction date 2003-01-01. 7th edition. Moscow: Ministry of Energy of Russia; 2005. 504 p. (In Russ.).
12. Rules for the installation of electrical installations / State Production Committee for Energy and Electrification of the USSR. Technical Administration for the Operation of Energy Systems. 3rd edition, revised and additional. Moscow; Leningrad: Energy; 1964. 456 p. (In Russ.).
13. SNiP II-B.3-72. Steel structures. Design standards: approved by the State Committee of the Council of Ministers of the USSR for construction on December 29, 1972. Moscow: Stroyizdat; 1974. 70 p. (In Russ.).
14. SP 16.13330.2017. Steel structures: set of rules: official edition: approved by order of the Ministry of Construction and Housing and Communal Services of the Russian Federation dated February 27, 2017 no. 126/pr: [instead of 16.13330.2011]: introduction date 2017-08-28. Moscow: Standartinform; 2017. 142 p. (In Russ.).
Review
For citations:
Novoselov A.A., Pichkurova N.S. Computational analysis of power transmission line steel structures according to modern regulatory and technical documents. Bulletin of Siberian State University of Transport. 2022;(4):86-93. (In Russ.) https://doi.org/10.52170/1815-9265_2022_63_86
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