Fully integrated EV energy storage using transport infrastructure

This paper explores the synergy between the use of electric vehicles (EVs) for commuting and light rail systems, for example an inner city trams system. The desire to move towards EVs is rapidly increasing the number of EVs available on the roads, and hence the availability of EV batteries for future vehicle to grid (V2G) applications. Most Light rail systems utilize a DC power supply (typically 750Vdc) and require large power draw as the tram / train accelerates. Moreover, a large regenerative power results when the tram / train stops. This paper explores the typical energy use in light rail systems and explores the utilization of the dc rail supply to charge EV's parked in `park-and-ride' facilities trackside. In addition, the V2G aspect of the system could allow the EV battery to form an energy supply to assist the tram / train during acceleration and accept the regenerated energy from the system as the tram / train stops.