Page 19 - Innovation in energy management: contribution of railways to sustainable mobility

It should be noted that one of the energy storage systems that is proposed for the future
is the use of green hydrogen. In the production stage, it could be obtained from renewable
electricity, preferably solar and wind energy, through electrolysis, and therefore it would
be another of the storage elements necessary to improve management of the electric grid.

R.4. Introduce (land) storage of external electrical energy

Investment: Nature: Improvement:

Related to:

R.7 R.9 R.10 R.20

This refers to the storage of electrical energy generated by external renewable energy
sources (R.2 refers to the exclusive storage of electrical energy generated by braking). It
is necessary to introduce the use of renewable energy sources for power supply, not only
for auxiliary installations or railway buildings, but also for trains.

In any case, electricity from other networks could also be accumulated in cheaper tariff
periods so that they can be used as auxiliary or emergency supply sources, or as support
at times of maximum energy demand.

This challenge is especially important for the development of the challenges related to
smart grids (R.6) and of self-consumption by the railway managers and operators (R.20).

R.5. Optimise the connection of the AC railway electrical system
with external networks

Investment: Nature: Improvement:

Related to:

R.7 R.10

The expansion of single-phase alternating current railways with industrial frequency is
promoting the development of new connection schemes that allow their use to be
compatible with the electrical power networks, producing a minimum effect on them.

Traditionally, the development of large high-speed axes has been associated with the
construction of the necessary supply networks (normally related to energy transport).
But sometimes it is not possible to deploy this infrastructure, so networks with lower
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Position paper: Innovation in energy management: contribution of railways to sustainable mobility
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