Some trains used in mass transit systems are equipped with regenerative braking. This allows trains to brake in regenerative mode and feed the other trains on the line, if there is a demand. Researches showed that up to 40 % of the total traction energy consumption could be supplied by this regenerative braking energy, if it is 100 % used. This usage rate depends on many different parameters such as train operation frequency called HT (headway time), train-set auxiliary power consumption rate, nominal braking acceleration rate, braking effort versus velocity curve of trains. Power system configuration such as substation locations and distances, catenary system resistance, and nominal power feeding voltage level has also considerable effect on recuperation rate. In the paper, some of these parameters' impacts will be examined with the help of a multi-train, multi-line DC rail system simulator. The results will be given in comparison tables and discussed. One result is, that operating with shorter HT is optimising energy recuperation as well as passenger convenience. Lastly, new emerging technologies such as flywheels and super capacitors to capture the unused braking energy will be briefly given.
Parameters affecting braking energy recuperation rate in DC rail transit
2007
6 Seiten, 7 Bilder, 7 Tabellen, 10 Quellen
Aufsatz (Konferenz)
Englisch
JRC/ICE2007-40023 Parameters Affecting Braking Energy Recuperation Rate in DC Rail Transit
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