Tidal plants for the twenty-first century

Tidal power can be one of the best renewable energies, thanks to its low cost and favorable impact on the power grid and the local economy. The choice of solutions can lead to a very favorable impact on the environment.

The global potential is probably close to 1,000 TWh/year. This potential is concentrated in around ten countries where tidal power can account for a significant share of electricity. This is the case in France, the country best placed by its high tidal potential and proximity to users. Three major sites, to be built between 2030 and 2050, could produce close to 100 TWh/year at less than e100/MWh. Two or three preliminary sites totalling 5 to 10 TWh at a lower cost than offshore wind turbines could be developed before 2030 to clarify impacts and costs in order to optimize the main structures, and to export the technique.

Surprisingly, France, once the leader with the Rance, then totally neglected this option, and now finds itself outstripped in research and development by Russia, and in achievements by Korea.