The service described below is still under development and the initial start setup for the OPC implementation between the TSO and RSCs. The definition of this service is subject to evolutions depending on the outcomes of the experimentation to be performed by the dedicated OPC sub-group. Therefore, the requirements described under this point are not to be interpreted as mandatory. This Annex may be amended after the full development of this service takes place.


This service aims at:

  • Identifying outage incompatibilities between relevant assets (according to OPS: grid elements, generators, loads) whose availability status has cross-border impact and limiting pan-European consequence of necessary outages in grid and production by relevant coordination of planned outages timing.
  • Proposing solutions to relieve these incompatibilities: at least non-costly remedial actions, adaptations of availability and outages´ planning (firstly on grid elements, secondly on other elements if no solution is available).
  • Coordinating findings and Remedial Actions proposals with other adjacent RSCs.


This service is requested for at least the following timeframes:

  • Year-ahead (to be performed in October – November of Y-1): systematic.
  • Updates up to week-ahead: on TSO requests, based on requests for planning modifications or significant changes on expected operational conditions (e.g. important forced outages for long periods, dry periods…).


To implement this service, RSCs need: common reference scenarios established by TSOs and corresponding CGMs, knowledge of all preliminary planned outages on main transmission network – AC and DC – (not only the preliminary planning for Relevant Assets).

TSOs and RSCs shall define how the system security is evaluated, for a given period of outages located between two reference scenarios (e.g. several intermediate dates).


We gave ourselves the challenge of explaining the Outage Planning Coordination service in less than 90 seconds. Here we go!