Improved technical and economic models of 35–750 kV overhead lines in accordance with the Law of Ukraine "On the Electricity Market" are proposed. The urgency and complexity of the problem is due to the fact that the transition to market relations presupposes the presence of private property, where the area under the grid facility, including the route of overhead lines, is a commodity and should be taken into account in shaping the value of this facility. In this regard, there is a need to review the discounted costs in the design of lines to bring them into line with market relations. The development of a new technical and economic model of 35–750 kV overhead lines was carried out taking into account the size and cost of land under the route of the line, which allows for a feasibility study of the optimal design option for the electrical network. The specific part of the land area in the cost of 1 km of overhead lines of different voltage classes is calculated. The components of the improved technical and economic model of 35–750 kV overhead lines are determined, namely the specific part of the component costs in the total cost of 1 km overhead lines of different voltage classes. A graphical representation of generalized models of investments in 35–750 kV overhead lines is presented. The presented studies take into account that during the construction of technical and economic models it is almost impossible to predict all its internal often stochastic connections, the elements of which cannot be expressed unambiguously, which leads to incomplete source information. Based on this fact, in the article for the analysis of the developed technical and economic models of lines the criterion method which allows to make decisions in conditional units both at full and at incomplete and indefinite initial information is applied. Implementing each equation of the developed technical and economic model of 35–750 kV overhead lines by the criterion method the ratio of components in the optimal design of lines in the corresponding voltage class is obtained, which allows to determine the development strategy of electrical networks and to form restrictions in incomplete source information.
IMPROVEMENT OF TECHNICAL AND ECONOMIC MODELS OF OVERHEAD LINES TRANSMISSION BASED ON CRITERIONAL METHOD
