Abstract
Taking into account the reorientation to new markets, the choice of a traction power supply system for the electrification of railway lines is becoming particularly relevant. In Russia, a 25 kV single-phase alternating current system and a 2ґ25 kV alternating current system are considered preferable. Both of them have some advantages and disadvantages that affect their further maintenance and the cost of electrification. The article provides a technical and economic comparison of 25 kV and 2ґ25 kV alternating current systems. It also proposes the methodology that allows them to be compared according to the given costs, and presents an example of calculation with some assumptions.
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