Taking into account electrical connection between traction substations in calculation of electrified-railroad capacity

Abstract

One of the main parameters determining railway efficiency is capacity. The main volumes of transportation of goods and passengers on the railways of Russia and most other countries are carried out along electrified sections. The traction power–supply system (TPSS) of electrified railways that provides the energy for transportation is at the same time an element limiting train handling through the sections. Thus, there is an urgent task to evaluate the railroad capacity in terms of energy supply, followed by the development of measures improving bottlenecks in the power–supply system. The paper presents the results of a study on improving a capacity calculation model of the electrified railways. An analysis of the “accuracy of calculation–railroad capacity” dependence and the electrical connection between traction substations is carried out. A traction power–supply system model of greater accuracy is developed through a procedure of model-result verification. Diagrams explaining the presence of electrical connection are presented. Electrical connection of both dc and ac adjacent traction substations is provided by means of activated sectional switchers of the overhead system and section switchboxes of the corresponding intersubstation zone. The developed traction power–supply model makes it possible to improve the accuracy of calculating the capacity of electrified railways.