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Prospects for Implementing of the 25 kV 50 Hz Voltage System in Poland

100%

Graff M.

Problemy Kolejnictwa

2023

tom Z. 199

67--76

In this article, the possibility of introducing a 25 kV 50 Hz voltage system into PLK’s network is discussed. It compares two voltage types – 3 kV DC and 25 kV 50 Hz – by describing on the experiences of neighboring countries like the Czech Republic, Slovakia, and Ukraine, which use AC and DC in their railway networks. In Poland, potential implementation the 25 kV 50 Hz system includes the CMK, LHS, and the planned Y line. Both the Czech Republic and Slovakia had plans for the gradual reelectrification of selected lines, transitioning from 3 kV DC into 25 kV 50 Hz. However, due to the significant costs involved, this process was staggered. The advantages of the 25 kV 50 Hz system over the 3 kV DC system, such as lower construction and operating costs for the line, have prompted considerations for its implementation, particularly on heavily trafficked lines.