Energy Supply in Public Transport

GUW+ Energy Supply Concept

© Fraunhofer IVI
Smart use of existing infrastructure for electromobility

The controlable reversible DC substation GUW+ connects the existing infrastructure for the energy supply of light rails and trams with charging stations for electric buses.

In addition, a battery storage unit is installed in GUW+. This storage is used to avoid peak loads, temporarily store excess braking energy from trams or light rails and provide energy on demand.

With GUW+’s system configuration, grid stability services can be offered and blackout scenarios of the energy supply can be handled.

High Current Energy Transmission System for Public Transport Vehicles

Safe and High-Performance Recharging

The operation of electrically driven public transport vehicles can help reduce the CO2 emissions in cities. However, supplying these vehicles with energy is problematic: Catenaries for trams and trolley buses are expensive and interfere with the existing city scape. In order to avoid catenaries, a recharging system is needed that is able to quickly and safely transmit energy to the on-board storage units.


Comprehensive Concept for the Energy Supply of Public Transport Vehicles

In order for electromobility to firmly establish itself in public transport, it needs to be able to compete with conventional systems economically. The »DockingPrinciple« combines charging infrastructure installed along roads with on-board energy storage units and a predictive energy management system so that electric buses and trams can be operated efficiently.