TRANSMISION 2023

Availability rate of the transmission grid

Information based on provisional data as of January 2024

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The quality of the transmission grid is also evaluated based on the availability of the facilities making up the grid. Availability measures the capacity of the system to use the various elements of the transmission grid, these being the electricity line circuits, transformers, and active or reactive power control elements (ballasts and capacitors).

The changes in the availability indicator over the last five years are shown below. The availability index of the transmission grid at the domestic level in 2023 reached a value of 97.63 %, which is below the 98.16 % achieved in 2022. The peninsular transmission grid reached a value of 97.62 % in 2023, lower than the 98.15 % in 2022. In the Balearic Islands and Canary Islands systems, grid availability was 97.84 % (98.52 % in 2022) and 98.93 % (98.69 % in 2022), respectively. In all electricity systems, the availability index stands above the 97 % reference value set out in Article 26.2 of Royal Decree 1955/2000.