€860k of budget
3 years

The FEDRE project (Fondations d’Eoliennes Durables et REpowering - Sustainable Wind Farm Foundations with Repowering) aims to improve the competitiveness of wind farms by optimising the construction of their foundations (reinforced concrete slabs).


Onshore wind turbines are designed to have a lifespan of around 20 years. After this time, they need to be replaced in order to maintain their installed power. This phase is called wind farm repowering.

 Wind farms were first developed in France some twenty years ago, which means that the first farms are now reaching their repowering phase.

Replacing wind turbines and towers also involves replacing wind turbine foundations. They comprise a heavy slab of heavily reinforced concrete to withstand the overturning moment. What currently happens is that the old slab is demolished and a new, wider and more solid one is put in its place. This approach is very unsatisfactory from an environmental standpoint.


The FUI25 FEDRE project has two objectives:


FEDRE brings together the INSA Lyon [engineering school] and 5 private partners. Two doctoral theses are in progress and support the development of the project. They are set to be presented in early autumn 2022..


The project in detail

The project started in September 2018 and is structured as follows:






what next?


The theses of Janet Modu and Adnan Sahyouni will be presented in autumn 2022

The FEDRE project is scheduled to end on 30/06/2023.

To see the webinar presenting the project, click here


« Adapting and strengthening existing slabs, rather than demolishing them and then building new ones, is an environmentally attractive approach as it reduces the carbon footprint of the foundations and the volume of waste produced.

The FEDRE project, which brings together experimental approaches, physical models in INSA Lyon’s laboratories and digital models, aims to develop solutions for slab re-use. This raises many diverse technical challenges. The enormous commitment of all the partners makes the project even more motivating.»

Eric Antoinet, Technical Director of Infrastructures at the AnteaGroup