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The Transports publics de la région lausannoise (tl) operates Switzerland's largest and oldest trolleybus network. The goal was to deploy modern electric buses without overhead powerlines, thereby meeting the canton's climate objectives.
To charge the new electric buses, modern charging infrastructure was installed at the Perrelet depot. This includes four Flex power units with 180 kW power each and twelve ceiling-mounted charge points. To accommodate the different lengths of solo and articulated buses, various cable management systems were implemented: a reel system, festoon systems, and cable trolleys. Line 24 was selected for the test operation due to its proximity to the depot and flat topography. In parallel, the electric buses are also being tested on other lines to analyze their performance on Lausanne's challenging inclines.
With a volume of 120 million passengers per year, Lausanne is focusing on a gradual electrification of its bus fleet. Initially, five e-buses were put into operation on Line 24, which will be the first line in the network to be fully electric from 2024. This conversion alone leads to an annual CO2 reduction of 350 tons. By 2030, the diesel fleet will be completely electrified, considering vehicle lifespans and technological progress. The project serves as a model for all public transport in Lausanne.
Heliox and TU/e aim to develop an integrated solution that makes charging heavy electric vehicles accessible without negative consequences for local electricity networks. Together, we want to achieve this by developing and demonstrating a new, multiple and dynamic charging system for heavy electric vehicles that is equipped with software-controlled stabilization to absorb disturbances on the local energy grid.
The intended system will consist of a dynamically configurable charging system based on modules that can be connected in parallel, each with three 60 kW outputs. With this they want to be able to distribute the loading capacity dynamically over several vehicles. The charging system can therefore be used for opportunity charging up to 360 kW for a single vehicle as well as for regular charging of several vehicles.
In addition, smart software and a microcontroller board are being developed. The converter of the charging system can be used via this software to compensate for grid disturbances. The disturbances are neutralized via a low impedance path. This allows losses on the grid to be converted into usable energy, while improving the voltage quality of the grid. In fact, the system completely takes over the function of current power filters on the basis of smart control.
The Transports publics de la région lausannoise (tl) operates Switzerland's largest and oldest trolleybus network. The goal was to deploy modern electric buses without overhead powerlines, thereby meeting the canton's climate objectives.
To charge the new electric buses, modern charging infrastructure was installed at the Perrelet depot. This includes four Flex power units with 180 kW power each and twelve ceiling-mounted charge points. To accommodate the different lengths of solo and articulated buses, various cable management systems were implemented: a reel system, festoon systems, and cable trolleys. Line 24 was selected for the test operation due to its proximity to the depot and flat topography. In parallel, the electric buses are also being tested on other lines to analyze their performance on Lausanne's challenging inclines.
With a volume of 120 million passengers per year, Lausanne is focusing on a gradual electrification of its bus fleet. Initially, five e-buses were put into operation on Line 24, which will be the first line in the network to be fully electric from 2024. This conversion alone leads to an annual CO2 reduction of 350 tons. By 2030, the diesel fleet will be completely electrified, considering vehicle lifespans and technological progress. The project serves as a model for all public transport in Lausanne.
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