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Transmission grid

Find here the data related to the evolution of the electricity transmission network: creation/renewal of overhead or underground lines, dismantling of existing lines. The evolutions are segmented by voltage level: 400 kV, 225 kV, 90 kV, 63 kV. The map of RTE's main commissionings in 2024 is also presented, as well as the battery connection capacities.

Évolution du réseau de transport [EN]

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Overhead lines of the transmission network

Last update: 11 March 2025 at 17:32
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400 kV et 225 kV
90 kV et 63 kV
        • Incomplete year
        • Preliminary data

        Informations and sources

        This graph shows changes in the overhead share of the transmission network. 

        The changes may correspond to : 

        - the commissioning of new lines 

        - renewal of existing lines 

        - removal of existing lines

        - corrections corresponding to various regularizations (correction of errors in line length, change of assignment, consignments, etc.).

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        Underground lines of the transmission network

        Last update: 11 March 2025 at 17:32
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        Global
        400 kV et 225 kV
        90 kV et 63kV
              • Incomplete year
              • Preliminary data

              Informations and sources

              This graph shows changes in the underground portion of the transmission network. 

              The changes may correspond to : 

              - the commissioning of new lines 

              - renewal of existing lines 

              - dismantling of existing lines 

              - corrections corresponding to various regularizations (correction of errors in line length, change of assignment, consignments, etc.).

              Graphe
              Legend and filters

              Underground lines of the transmission network

              Last update: 11 March 2025 at 17:32
              Legend and filters >
              Hide
              Global
              400 kV et 225 kV
              90 kV et 63kV
                    • Incomplete year
                    • Preliminary data

                    Informations and sources

                    This graph shows changes in the underground portion of the transmission network. 

                    The changes may correspond to : 

                    - the commissioning of new lines 

                    - renewal of existing lines 

                    - dismantling of existing lines 

                    - corrections corresponding to various regularizations (correction of errors in line length, change of assignment, consignments, etc.).

                    Graphe
                    Legend and filters

                    Length of electricity overhead and underground lines

                    Last update: 11 March 2025 at 17:46
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                          • Incomplete year
                          • Preliminary data

                          Informations and sources

                          France’s electricity transmission system, operated by RTE, includes high-voltage lines operating at voltages of between 63 kV and 400 kV. It is the largest transmission grid in Europe. This grid is constantly evolving, with: 

                          • The creation of new overhead and underground lines;
                          • The renewal of lines (replacement of conductors);
                          • The undergrounding of overhead lines;
                          • The decommissioning of lines.

                          The chart shows the evolution of the total length of the overhead and underground lines.