Nowadays, in several European Railway networks, the old DC supply systems are severely limited by line‐voltage drops. In some sectors, it is not possible to increase traffic or to operate locomotives at their nominal ratings. To increase the capacity of a DC supply system, without additional substations, the authors propose a new three‐wire supply system which restores the overhead line voltage with multilevel DC choppers operating as voltage boosters. Circuits using a third wire with a negative or a positive polarity are considered and compared. Case studies are presented for the French and Italian rail networks. Finally, experimental results performed on a test platform of the French railways, are presented in the case of a double 1.5 kV supply system.
New three‐wire supply systems for DC electric railways
IET Electrical Systems in Transportation ; 5 , 3 ; 112-119
01.09.2015
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
power overhead lines , DC supply systems , substations , Italian rail networks , line‐voltage drops , negative polarity , European railway networks , double supply system , power 1.5 kW , railway electrification , rail traffic , positive polarity , French railway test platform , choppers (circuits) , DC electric railways , voltage boosters , three‐wire supply systems , overhead line voltage restoration , multilevel DC choppers
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