Trains in Hamburg Metro power local station

Alstom Hesop energy converter, source: Alstom

Trains running in Hamburg U-Bahn are able to power one of the metro stations. This was made possible by the Hesop energy converter that collects and redirects braking energy into the grid. The innovative solution was deployed by Alstom for the first time in Germany.

Alstom installed the Hesop energy converter in the Rauhes Haus station which is located on Line U2 of the Hamburg Metro network. The solution allows the public transport operator Hamburger Hochbahn to increase the energy efficiency of the local metro system by collecting 99 per cent of braking energy, redirecting it for use within the passenger station or returning into the grid. “It is an important element of the clean, efficient public transportation of the future, offering unique economic and environmental benefits,” said Jörg Nikutta, Managing Director of Alstom in Germany and Austria.


Alstom developed the Hesop energy converter, especially for public transport systems. It is an advanced reversible power substation which both supplies traction voltage to a network and recovers braking energy from vehicles. Two company’s sites were involved in this process: the system was designed in Saint-Ouen, France, while the manufacture took place in Charleroi, Belgium. Hamburger Hochbahn ordered the Hesop converter in 2019. It is worth to recall that the solution was deployed in metro networks across the world including those in London, Milan, Dubai.

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Author: Mykola Zasiadko

Mykola Zasiadko was editor of online trade magazines and

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