The Role of TSO-DSO Coordination in Flexibility Asset Prequalification

As market-based ancillary services (e.g., for congestion management) are introduced and developed for the various grid levels of the European power systems, it becomes a necessity to coordinate the actions of power system operators (TSOs, DSOs) in defining and implementing the processes needed for functioning of these evolving markets. Prequalification is one of the key processes, where TSO-DSO coordination has a significant role. However, it can be implemented with various degrees of complexity. This paper analyses the sequence of actions necessary to carry out prequalification and the actors and functionalities involved.