MATH MODELING OF ELECTRIC FIELD STRENGTH DEPENDENCE ON AIR LINE WIRES FROM SPLIT PARAMETERS
In this paper, based on the finite element method, a two-dimensional mathematical model of the electric field of wires of an air high-voltage transmission line was developed. On the basis of the proposed model, electric field distribution patterns were obtained, the electric field strength around the phase was studied during the laying of an overhead transmission line of 500 kV, and the dependence of the strength value on the phase splitting diameter and the number of wires for a fixed phase section was obtained. The two-dimensional problem of the electrostatic field, based on the differential Poisson equation, was solved. The study considered a single phase, split into three, four and five conductors. To evaluate the effect of the splitting diameter on the electric field strength, we considered a phase split into 5 wires. The cross-section and the number of wires in the phase were fixed, the distance between the conductors in the splitting varied. The calculation was carried out for distances between conductors equal to 460, 565 and 770 mm. The dependence of the electric field strength of the wires on their cross section and the amount in the splitting was for the total fixed cross sections of the phase. The cross-sectional areas of the phase were equal to 1000, 2000 and 3000 mm2. These cross sections were made up of standard wire sizes. A percentage evaluation of the influence of the considered splitting parameters on the indices of the electric field strength was made. Graphical dependences of the intensity on different splitting parameters are presented. Numerical analysis was performed using the finite element method in the software environment of Ansoft Maxwell.