Red Eléctrica de España
This practice reflects the energy efficiency first (EE1) principle in a system-wide approach, applying it to all the steps of the transmission network planning. Robust results are obtained using powerful tools enabling the selection of the best alternative with the lowest environmental and economic impact.
About the practice
The practice only considers alternatives that optimise the use of the existing network. If these alternatives are insufficient to meet the identified needs, alternatives that consider new infrastructures are evaluated; with new corridors only as last option.
A cost-benefit analysis (CBA) is performed using a detailed model of the system, including joint market and network simulations, using optimisation tools, and considering all the possible hourly situations within a representative year to ensure the robustness of the results. The alternatives include recent innovations such as automatic generation downloading for renewables, Dynamic Line Rating (DLR), and batteries working as integrated network components.
Red Eléctrica de España is the sole transmission agent and operator (TSO) of the national electricity system in Spain.