Feasibility Study on the Selection of Phase Design and Overhead Line Wire Cross-Section

Abstract

The paper analyzes the existing method of choosing the cross-section of wires by the method of an interval of economic curves. It is shown that the cross-section of the wires and the design parameters of the lines must correspond to the ratio between the cost of construction and the cost of optimizing the design of phase wires. The algorithm of application of this method for 330 kV power transmission lines with split phase is substantiated. A current load search algorithm has been developed and proposed, in which it is assumed to switch to the use of split-phase wires with minimal costs. Many arrays of curves are constructed, which allows for choosing the cross-section of wires and the conditions under which it is necessary to split the phase wire. Algorithms for selecting economically feasible wire cross-sections and methods for determining the conditions of profitability of overhead power lines are presented. The optimization of the cross-section and construction of the line phases was carried out, and the conditions of expedient phase splitting and application of lines of increased natural power were determined. The least-squares method was used to approximate the lower envelope. Ref. 9, fig. 3, table.