Generation capacity access at network nodes
Check the availability of power for generation facilities at our network nodes
In compliance with RD 1183/2020 of 29 December on access and connection to electricity transmission and distribution networks, Article 5, and CNMC Circular 1/2021 of 20 January, which establishes the methodology and conditions for access and connection to transmission and distribution networks for electricity generation facilities, Article 12, the access capacities are published for each voltage level above 1 kV in the HV/HV and HV/MV substations operated by EDistribución Redes Digitales SLU and Energías de Aragón I SLU. These capacities are reported and calculated as defined in the CNMC Resolution of 27 June 2024, which sets out the Detailed Specifications for determining generation access capacity to the transmission and distribution networks, as well as in the CNMC Resolution of 30 April 2025, which establishes the formats for publishing demand and generation capacities by distribution network operators.
The available access capacity for each node has been determined as the maximum additional active power that may be injected at that node, taking into account only the occupied capacity reported at all network nodes 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, provided for guidance only, does not remove the need for a specific study for each individual request, which will take into account any variations in the scenario, such as pending requests with higher priority, both at the node under study and at other nodes in the network that may influence it.
Limitations that may exist in other distributors’ networks, in the transmission network, or in the substation itself, due to configuration or operational aspects, and those relating to connection feasibility, are not taken into account. Such limitations would, where applicable, be identified in the corresponding acceptability and access, and connection feasibility reports that must be carried out for each individual request.
The reported “Available Access Capacity” values must not be interpreted as simultaneous or cumulative capacity values. The connection of a generator at a node not only reduces the available access capacity at that node but also at nodes within its adjacent network.
The reported values for occupied capacity and for admitted but pending capacity refer exclusively to generators connected or with access and connection permits granted or requested at these nodes or within their underlying network at the same voltage level
As publications are issued monthly using data from the previous month, they may reflect available capacity at a node that has already been fully allocated due to requests accepted before the publication date, both at the node itself and at other nodes in the network that may influence it or its underlying networks.
Except in duly justified exceptional cases, access and connection requests that do not comply with the maximum and minimum power ranges per voltage level established in the “Detailed Specifications” will be rejected.
Requests specifically targeting nodes where the published capacity is 0 MW will be inadmissible, in accordance with Article 8.1(d) of RD 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 DA2ª of 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 evaluate the impact on the transmission network of the connection to the distribution network.
Generation Capacity Map
This map provides an approximate geographical indication of the e-distribución network nodes with available access capacity for generation.
The capacity map should be regarded as an informative representation of the capacities published in the official XLSX/CSV listings. In the event of any discrepancies, the official values are those shown in the XLSX/CSV files.