DOI: https://doi.org/10.15802/etr.v0i7.42328

Electric rail traction in Czech Republic and level of effectiveness and energy saving measures

H. Seelmann

Abstract


Czech Railways currently operate 163 two-system locomotives for 3 kV DC and 25 kV AC/50Hz, 16 two-system locomotives for 3 kV DC and 15 kV AC/16.7Hz, 20 locomotives and 14 units for three-systems (3 kV DC, 25 kV AC/50Hz, 15 kV AC/16.7Hz. Furthermore, some multi-system locomotives from Austria and Slovakia are running with international trains also in Czech Republic.

Regenerative braking and recovery of electricity in the electric railway network in Czech Republic is usual, but often in a limited form. Reasons are relatively small amount of electric locomotives and units capable for regenerative braking, restrictions on the maximum voltage in DC power supply system and restrictions because of requirements for the regulation of the overall network in AC power supply system.

With automatic train leading local trains can achieve savings of 7-9% of traction energy. Currently, about 350 km of tracks and about 250 locomotives and units are completely equipped with this system.

Optimized Energy Consumption in Tram and Trolley Bus Network is a project of Brno Public Transport Company. This measure aims to reduce the peak usage of energy for trams and trolley buses in order to limit the contracted reserve capacity and the related costs.

Keywords


electric traction; effectiveness; energy saving

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References


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