Grid manager and transmission agent
Red Eléctrica is responsible for the transmission of high voltage electricity in Spain. To do so, it manages the electricity infrastructures that make up the transmission grid and connects the power stations to the points where it is distributed to consumers.

Manager of the transmission grid

Law 17/2007, of 4 July, confirmed the status of Red Eléctrica as the manager of the transmission grid and attributed it the function of sole transmission agent under a regime of exclusivity. In compliance with this Law, in 2010 Red Eléctrica acquired the assets of the Balearic Islands and Canary Islands and the remaining assets on the Spanish peninsula that were pending transfer from the electric utility companies. This acquisition represented the definitive consolidation of the model of sole transmission agent and electricity system operator.

As manager of the transmission grid, Red Eléctrica is responsible for developing and enlarging the grid, carrying out its maintenance and managing the transmission of electricity between external systems and the Spanish peninsula and guaranteeing third party access to the transmission grid under equal conditions.

In-service facilities

The transmission grid of Red Eléctrica is comprised of more than 44,000 kilometres of high voltage electricity lines and more than 6,000 substation bays, and more than 93,000 MVA of transformer capacity. These assets make up a meshed grid that is secure and reliable that offers the highest level of service quality to the Spanish electricity system.

Transmission grid (peninsular and extra-peninsular) of Red Eléctrica. Data available at December 31, 2021

Km of circuit 2017 2018 2019 2020 2021
400kV 21,735 21,737 21,748 21,764 21,768
220kV 19,641 19,735 19,853 19,886 20,068
150 - 132 - 110kV 524 636 697 753 753
110kV 2,035 2,075 2,067 2,078 2,098
Total 43,934 44,183 44,365 44,482 44,687

 

Substation bays (peninsular and extra-peninsular) of Red Eléctrica. Data available at December 31, 2021

Number of bays 2017 2018 2019 2020 2021
400kV 1,479 1,501 1,538 1,549 1,591
220kV 3,214 3,261 3,340 3,319 3,376
150 - 132 - 110kV 125 130 151 151 159
110kV 853 903 922 951 978
Total 5,671 5,795 5,951 5,970 6,104

 

Transformer capacity (peninsular and extra-peninsular) of Red Eléctrica. Data available at December 31, 2021

Power (MVA) 2017 2018 2019 2020 2021
Total 88,744 91,626 91,591 93,021 93,871