The commercial service will start in the second quarter of
2023 with services in the territories of each of the four partner regions: the Occitanie, Grand-Est, Nouvelle-Aquitaine and Centre-Val-de-Loire. A
zero-emission mode will be tested on urban routes.
A French première
This electric-diesel-battery regional train is the first
hybridisation project of a Régiolis train in France. The project was launched
in 2018 by SNCF Group and Alstom, with the mobilisation and financial
participation of the Occitanie, Grand-Est, Nouvelle-Aquitaine and
Centre-Val-de-Loire Regions, and the provision by the Occitanie Region of a
train from its liO fleet. The ambition of the project is to contribute to the
decarbonisation of the regional trains fleet. The objectives are to reduce
energy consumption and greenhouse gas emissions, with a solution that makes it
possible to adapt the existing diesel fleet without having to modify the
Eight months of testing
The validation of the energy storage systems at Alstom's
Tarbes site (centre of excellence for "green" traction systems), at
the end of 2020, enabled the first Régiolis train to be hybridised at the
beginning of 2021 at the Alstom Reichshoffen site. The hybridisation of the
train consisted of replacing half of the diesel engines with energy storage
systems made up of lithium-ion batteries. The train was also temporarily
equipped with a laboratory coach and sensors to measure the train's energy
Equipped with its two energy storage systems and its laboratory
coach, the train started its tests in 2021. A static and dynamic tuning phase
at up to 60 km/h took place in Reichshoffen to check the train's operations and
test its hybrid traction mode. The tests then continued on the Velim test
center (in the Czech Republic), with validation and certification tests at up
to 160 km/h. All of the train's new traction modes were tested at high speed
and the route simulation models were validated.
Successful initial feedback
The tests showed that the train performed as expected.
The rate of energy recycling during braking, which is used
to recharge the batteries, is very high, over 90%, allowing energy savings of
up to 20%, depending on the itinerary.
With a range of around 20 kilometres, the zero-emission mode
allows the train to run without using combustion engines: this feature will be
tested in commercial service to reduce pollution in certain urban areas. The
hybrid Regional Train will have the same autonomy on non-electrified lines as
the dual-mode diesel-electric version, up to 1,000 kilometres.
The first hybrid regional train will soon leave the
Reichshoffen site to begin its final test phase on the French national railway
network. These final tests will enable SNCF Voyageurs to finalise the admission
file that will be presented to the Public Railway Safety Establishment (EPSF)
with a view to obtaining the necessary authorisations for its commercial
operation. This period will also be used by SNCF Voyageurs to prepare the
operation of the train in the various territories (traffic plan, staff
training, etc.). The experimental commercial service will start in the second
quarter of 2023 with traffic in each of the partner regions, before considering
the deployment of the hybrid solution on the existing Régiolis fleet.