Generation capacity access at network nodes
Check the availability of power for generation facilities at our network nodes
In accordance with Royal Decree 1183/2020 of 29 December on access to and connection to electricity transmission and distribution networks, in Article 5 thereof, and CNMC Circular 1/2021 of 20 January, which establishes the methodology and conditions for access to and connection to the transmission and distribution networks for electricity generation facilities, in Article 12, the access capacities at each voltage level > 1 kV of the HV/HV and HV/MV substations operated by EDistribución Redes Digitales SLU and Energías de Aragón I SLU are hereby published. These capacities are reported and calculated as defined in the CNMC’s Resolution of 27 June 2024, which establishes the Detailed Specifications for determining generation access capacity to the Transmission Network and Distribution Networks, as well as in the CNMC Resolution of 30 April 2025, which establishes the formats for the publication of electricity demand and generation capacities by distribution system operators.
The available access capacity for each node has been determined as the maximum additional active power that can be injected at that node, taking into account solely the occupied capacity reported at all nodes in the network and the planned installation scenario, without considering additional reinforcements, in accordance with the criteria set out in CNMC Circular 1/2021 and the “Detailed Specifications” for determining access capacity. This information, which is provided for guidance only, does not obviate the need to carry out a specific study for each application that takes into account any variations in the scenario, such as the consideration of pending applications with higher priority, both at the node under consideration and at other nodes in the network that may influence it.
No account is taken of any limitations that may exist in other distributors’ networks, in the transmission network, or at the substation itself, arising from configuration or operational aspects of the substation or relating to the feasibility of connection. Such limitations would, where applicable, be identified in the relevant acceptability, access, and connection feasibility reports that must be carried out for each application.
The reported “Available Access Capacity” figures should not be interpreted as simultaneous or additive capacity figures. The connection of a generator at a node not only reduces the available access capacity at that node, but also at the nodes in its neighbouring network.
The reported figures for occupied, authorised, and unresolved capacity refer exclusively to generators that are connected or have been granted or have applied for access and connection permits at these nodes or within their underlying network at the same voltage level.
As these publications are issued monthly with data from the previous month, they may reflect available capacity at a node that may already have been exhausted by applications accepted before the publication date, both at the node itself and at other nodes in the network that influence it or its underlying networks.
Except in duly justified exceptional cases, applications for access and connection that do not comply with the range of maximum and minimum power levels per voltage level set out in the “Detailed Specifications” will be rejected.
Applications made for nodes where the published capacity is 0 MW will not be accepted, in accordance with Article 8.1(d) of Royal Decree 1183/2020.
NOTICE FOR STORAGE APPLICATIONS
Regarding the entry into force of the CNMC Resolution of 27 June 2024, which establishes and amends the Detailed Specifications for determining access capacity for demand and generation to distribution networks, specific operating patterns for storage facilities shall not be taken into account until they are approved by a CNMC resolution and published on this platform. In accordance with the First Transitional Provision of CNMC Circular 1/2024, and until such resolution is approved, storage facilities shall continue to be assessed based on the existing firm capacity of the network, considering their operation both as generation and as demand.
As set out in Addendum 2 to CNMC Circular 1/2021, applications for installed capacity exceeding 5 MW on the mainland and 500 kW in non-mainland systems may require an acceptability report to assess the impact of the connection to the distribution network on the transmission network.
Generation Capacity Map
On this map, you will find the nodes of the e-distribution network marked, with their approximate geographical location, along with the available access capacity for generation at each one.
The capacity map should be regarded as a purely informative representation of the capacities published in the capacity list in xlsx/csv format. In the event of any discrepancies, the official figures are those shown in the xlsx/csv file.