The public transport company of Brno (DPMB) operates 150 trolley buses. Operation of clean vehicles requires an infrastructure comprising 28 substations that provide electric energy to the entire trolley bus network. Public transport generally involves frequent braking and accelerating, a very frequent phenomenon due to Brno's hilly topography. Most of the energy generated during the braking process of the vehicle is not used in any way, leading to inefficient operation.
The DPMB expected that the study undertaken by the university to propose a technical solution that involves storing the energy generated during braking and using it for accelerating. Consequently implementation of the measure should consist of reducing peaks in energy consumption of the electric public-transport vehicles.
- Utilisation of electricity generated by the traction motor while braking
- Reduction of peaks in energy consumption
- Utilisation of the accumulated energy for limited operation of the vehicle without the trolley line
- Reduction in energy efficiency and robustness of public-transport electric vehicle operation