Expediency assessment of the application of methods economic current density and economic current intervals in modern conditions

The expediency of improvement of the economic current density and the development of economic current intervals methods based on the application of the effective current is considered. It is shown that in modern conditions, the use of economic current density and economic current intervals when selecting the wire sections for the overhead lines leads to the results shifting suboptimally, thus excessive cross sections. This is due to the use of outdated information on the cost of overhead lines, the cost of electric energy losses. It is determined that the accuracy of overhead lines section selection is largely impacted by the reliability of the following initial data: the cost of the electric energy losses, the scheduled current loads of the line. The disadvantages of these overhead lines wires selection methods are revealed. The conclusion about the necessity to develop a new method for the determining of overhead lines sections based on other methodical approaches, free of the shortcomings of the existing economic current density and economic current intervals methods is drawn.