La Billetterie

L’intérêt c’est que c’est un des plus grand cabinet allemands dans les renouvelables qui le dit :
DLR Institute of Technical Thermodynamics _ « We need energy storage for the energy transition »
– this problem has been limited because the energy output from fossil-fuelled power stations is quick and easy to adjust, enabling them to deliver more power at peak times. => c’est faux mis à part les centrales à cycle ouvert basé sur le gaz, l’ajustement est loin d’être rapide, et se fait de préférence sur l’hydraulique
– However, given that over 30 percent of our grid power will soon be deriving from renewable sources this mechanism will no longer work : Même eux le reconnaisse !

A mettre en parallèle avec l’analyse suivante pour le danemark :
West Danish wind power – a personal view © V.C. MAson – 2008
– transfer involving long-established DC and AC inter-connectors, totalling about 5.4 GWe of capacity (entre Ouest et Est)
– An increase in wind speed from 9 to 11.5 m/s at the Horns Rev off-shore station could double production from about 80 to 160 MW within a few minutes
– separating wind turbines by a distance of 7 to 10 times their rotor diameter
– wind power production has been observed to fall by as much as 40 percent from the first to the last turbine in a row
– breakdowns caused by the wear and tear of turbine gearboxes and roller bearings occur regularly
– Harsh environments have also caused very expensive longer-term breakdowns in transformers and components of offshore turbines
– contribution to total supply increases the predictability and quality of overall electricity production deteriorates
– in 2004 wind power output equated to about 18.5 percent of total domestic electricity production, but that 70.5 percent of this power was exported
– Denmark’s access to the much bigger systems of Norway, Sweden and Germany is crucial for the disposal of its surpluses, the provision of backup, and the operational integrity of its grids. It is particularly convenient that Norway can conserve its hydro potential by assimilating Danish surpluses
– During 2007, there were 83 hours when wind electricity was sold from West Denmark for DKK zero
– [Denmark] produce the equivalent of about a fifth of its annual demand for electricity. However, around half of this cannot be used directly or stored within national borders at the moment of generation.

3 documents détaillant l’analyse de l’éolien :
Le transport du courant électrique
Problèmes d’un grand réseau électrique éolien – analyse rapport E.On
Politique éolienne au Danemark depuis 2002
Pipelines – efficacité – Comparaison des coûts de transport de l’énergie