Расчет параметров мобильного механизированного комплекса, выполняющего монтаж воздушной линии, находящейся под влиянием контактной сети переменного тока

Abstract

Purpose: To calculate the parameters of a mobile mechanized complex (MMC) that performs the installation of an overhead line of longitudinal power supply under the influence of an AC contact network. The asymmetry of electrical parameters in overhead lines (OL) caused by the electromagnetic influence of the contact network leads to a decrease in the quality of electricity for consumers. This contributes to a decrease in the stability of the OL. The worst option may be the ignition of a dwelling, which is powered by the specified OL. A new type of transposition solves the problem of asymmetry, which consists in twisting the wires by 60 ° each span of the supports. With this method of installation, the distance between the wires will be constantly uniform. The problem of asymmetry of electrical parameters is solved, since the mutual movement of phase wires will contribute to the same effect of the electromagnetic field on all three wires. Accordingly, the levels of induced voltages of both components — electric and magnetic — will be leveled. Methods: The analysis of existing methods of installation of OL, profile pipes for the torsion machine, the calculation of the profile for MMC, mass-dimensional characteristics, types of wires and drums for which MMC is designed was carried out. Results: In the article, the parameters of the torsion machine, which consists of movable and fixed parts, were calculated. The brands of wires for OL, drums for installation were selected and their parameters were calculated. The dependence of the loads on the frame of the torsion machine on the length of the profile pipe at the time of maximum loading was constructed. The dimensions of the profile pipe for the frame of the torsion machine and the steel grade were selected, and the simulation of the most loaded support beam of the wire drum attachment was carried out to predict loads and deflection. Practical significance: The necessity of using MMC for OL installation is shown, since only it is able to perform installation with increased symmetry of linear parameters. MMC is a twisting machine with wire drums, a manipulator for mounting wires, a device for fixing and tensioning wires, a control system and a base on which the MMC is mounted. The advantages of using automation in MMC are substantiated.