DISTRIBUTION OF TRACTION SUBSTATIONS ON POWER SUPPLY DIVISIONS WHILE IMPLEMENTING HIGH-SPEED OPERATION

The research deals with the distribution of traction substations on the particular power supply section while implementing high-speed operation. The authors suggest variants of solving the task related to the distribution of traction substations on power supply divisions while implementing high-speed operation under the condition that the powers of traction substations are known. The optimal distance between traction substations for the particular section is defined. The task concerning the choice of the optimal distance between traction substations is solved on the grounds of the results of electrical calculations and modeling loads on the traction energy system applying the EWB program. The research is conducted for the double-track line 43 km long, electrified according to the system of 27kV alternating current. The characteristics of the electric train «Sokil» are used during the modelling, on their basis traction calculation is carried out, which results in changing the speed and consumption current of the train within the researched section. Electric traction network is represented by apparent impedance of tracks and rods which include active R and inductive X resistances of these elements. The equivalent circuit of the double track section of the electric traction network is presented. Modelling of the zone between the traction substations is carried out for different length of the zone. The optimal distance between traction substations is defined on the grounds of this modelling. This conclusion is proved by the economical calculation. It is shown that the traditional methods for defining the length of the traction-to-traction zone while implementing high-speed operation provide overrated results, that is why they have to be employed on high-speed sections with adjustments.