Determination of Reduced Tension at Conductive Wires and Lightning Protection Cables Breakage of Overhead Power Lines with a Voltage of 35–110 kV
Abstract: The article aims to develop a numerical-analytical method of solving the problem about determining the tension of wire after its breakage. Solution of this problem is realized in software package MS «Excel». As the model was taken the part of overhead power transmission line (OPTL) – anchored site, consisting of two anchor supports and intermediate supports located between them, to which are suspended conductive wires and lightning protection cable. Supports are considered as the components of all constructional system of the power grid. Wire breakage is modeled serially in each of eleven spans. At calculation the value of the reduced tension of wire calculated to know the load on an intermediate support in crash conditions and magnitude of sag wire in the span adjacent to the emergency span is analyzed. The attention to flexibility of supports of OPTL is paid. It is established that the flexible support deviate towards the survivor wire under the influence of its tension, and support deflection is also added to the displacement of the suspension point due to deviation the insulator string. Based on the calculation and generalization of the results dependence of the value of reduced tension from the number of follow-up spans of anchor site with the survivor wire is revealed and the number of spans required to find the maximum value of reduced tension is determined.
Keywords: overhead power transmission line, reduced tension, spatial model, overhead power transmission line support, set of equations, design loads.
Pages: 195-205.
For citation: Tanasoglo, A. V.; Fomenko, S. A.; Bakayev, S. N. [et al.]. Determination of Reduced Tension at Conductive Wires and Lightning Protection Cables Breakage of Overhead Power Lines with a Voltage of 35–110 kV. – Text : electronic. – In: Metal Constructions. – 2022. – Vol. 28, N 4. – Р. 195-205. – URL: https://donnasa.ru/publish_house/journals/mk/2022-4/st_03_tanasoglo_fomenko_bakayev_kozlova.pdf (date of access: 21.11.2024). – ISSN 1993-3517.
Vol. 28, N 4 (2022)
Journal: Metal Constructions
Publish house: Donbas National Academy of Civil Engineering and Architecture
Journal: Metal Constructions
Publish house: Donbas National Academy of Civil Engineering and Architecture