Siemens and Movia bring smart charging to Danish buses
April 18, 2018
Public transport authority Movia is installing smart charging stations for buses in 45 Danish municipalities using technology from German giant Siemens.
Siemens signed a frame contract with Movia to deliver charging stations with a top-down pantograph for electric buses on request of their municipalities.
The 45 municipalities include the city of Copenhagen within the Capital Region of Denmark and Region Zealand. Siemens will provide high-power charging (HPC) stations, with power levels of 150, 300 or 450kW.
The three-year contract includes the installation, commissioning, civil engineering works and the Siemens eBus cloud remote monitoring system. This is one of the biggest frame contracts for the Siemens eBus business and it is accompanied by a six-year service contract. The service contract is important, since providing the necessary service level has often proven to be the weak part in testing electricity as a propellant on a larger scale.
In 2017, the 45 municipalities and two regions of Zealand agreed to aim for CO2-neutral bus transport by 2030 as part of Movia's Mobility Plan 2016, to the benefit of the more than 215 million annual passengers. In addition, the municipality of Copenhagen aims to become the world's first CO2-neutral city in 2025.
The switch to electric buses in Copenhagen, where nearly 100 million passengers travel by bus each year, will eliminate particle and noise pollution and CO2 emissions from the public buses.
"Movia aims to deliver climate-friendly mobility for the benefit of cities, businesses and citizens," said Movia chairwoman Kirsten Jensen. “The agreement with Siemens paves the way for electric buses throughout Zealand and thus increases the green change of bus transport for which we have been working hard for several years. It's really very pleasing.”
Selected bus terminals are equipped with charging stations providing the necessary power to the electric buses via a top-down pantograph inversely mounted to a mast. The battery-management system of the electric bus controls the charging process according to the ISO 15118 standard protocol via wifi communications. Additionally, the control pilot circuit defined by the standard DIN EN 61851 provides a manual control over the charging process to ensure the highest safety standards.
"Electromobility plays a key role in enabling environmentally friendly transportation in our cities," said Roland Edel, chief technology officer of Siemens’ mobility division. “Siemens offers solutions for intelligent road, thanks to our proven, fully automated eBus charging technology. It is fast and efficient, adapted to cities' requirements, punctuality needs, environmentally friendly public transport and low energy consumption.”
The charging process is initiated when the electric bus arrives on the charging mast and wifi communications are established. To charge the batteries, the bus stops underneath the charging mast. As soon as the driver has activated the hand brake, the charging process is started automatically and the four-pole pantograph connects with the bus.
The buses are equipped with contact rails on the roof above the front axis of each electric bus. Once the driver releases the hand brake, the charging process stops and the pantograph automatically rises to the upper position, allowing the bus to leave.
The HPC stations can charge the bus batteries within four to six minutes at regular dwell time intervals, enabling them to complete a full day of scheduled service. By charging just enough for travelling all day from terminus to terminus or to the next available charging point, the off-board high-power charger adds flexibility to the eBus service.
Since the buses occupy the charging station only for a few minutes, the off-board high-power charger is suitable for high-frequency operating conditions, since the charging infrastructure can be used by several buses per hour, even if they are from different manufacturers.
In addition, Siemens also developed the on-board interfaces for the bus.
By providing all components from a single source, Siemens says it guarantees an interoperable charging system to deliver electric charge from the same charging station to buses from different bus manufacturers.
Selected bus routes in Hamburg (Germany), Stockholm and Gothenburg (Sweden), Drammen and Oslo (Norway) and Montreal (Canada) are already electrified with this technology.