Transport Research Arena 2020 (TRA 2020), Helsinki, Finland, 27 - 30 April 2020, pp.18-19
Nowadays, most of the new metro systems deploy Communication Based Train Control system with grade of automation level 2 or above in which signaling system is driving the trains as per pre-defined speed profiles based on a set of performance parameters. IEEE Std. 1474 standard specifically names train acceleration, train coasting, and train braking that a CBTC system may have as energy optimization algorithms. This paper examines the effects of different combinations of above-mentioned parameters on the travel time and energy saving potential against all-out performance. A rail systems simulation software, which can simulate both train performance and traction system at the same time taking the regenerative braking into account, is used to test different combinations of performance parameters against the coasting strategy, and provide a comparison between them. The tests cover from ‘station to station’ runs with single train to complete line runs with multiple trains.