Real-time data exchange
Article 42
1. In accordance with Articles 18 and 19, each TSO shall exchange with the other TSOs of the same synchronous area the following data on the system state of its transmission system using the IT tool for real-time data exchange at pan-European level as provided by ENTSO for Electricity: (a) frequency; (b) frequency restoration control error; (c) measured active power interchanges between LFC areas; (d) aggregated generation infeed; (e) system state in accordance with Article 18; (f) setpoint of the load-frequency controller; and (g) power interexchange via virtual tie-lines. 2. Each TSO shall exchange with the other TSOs in its observability area the following data about its transmission system using real-time data exchanges between the TSOs' supervisory control and data acquisition (SCADA) systems and energy management systems: (a) actual substation topology; (b) active and reactive power in line bay, including transmission, distribution and lines connecting SGUs; (c) active and reactive power in transformer bay, including transmission, distribution and SGUs connecting transformers; (d) active and reactive power in power generating facility bay; (e) regulating positions of transformers, including phase-shifting transformers; (f) measured or estimated busbar voltage; (g) reactive power in reactor and capacitor bay or from a static VAR compensator; and (h) restrictions on active and reactive power supply capabilities with respect to the observability area. 3. Each TSO shall have the right to request all TSOs from its observability area to provide real-time snapshots of state estimated data from that TSO's control area if that is relevant for the operational security of the transmission system of the requesting TSO.