Control requirements
Article 17
1. The relevant TSO and the transmission-connected demand facility owner or the transmission-connected distribution system operator shall agree on the schemes and settings of the different control devices of the transmission-connected demand facility or the transmission-connected distribution system relevant for system security. 2. The agreement shall cover at least the following elements: (a) isolated (network) operation; (b) damping of oscillations; (c) disturbances to the transmission network; (d) automatic switching to emergency supply and restoration to normal topology; (e) automatic circuit-breaker re-closure (on 1-phase faults). 3. The relevant TSO and the transmission-connected demand facility owner or the transmission-connected distribution system operator shall agree on any changes to the schemes and settings of the different control devices of the transmission-connected demand facility or the transmission-connected distribution system relevant for system security. 4. With regard to priority ranking of protection and control, the transmission-connected demand facility owner or the transmission-connected distribution system operator shall set the protection and control devices of its transmission-connected demand facility or its transmission-connected distribution system respectively, in compliance with the following priority ranking, organised in decreasing order of importance: (a) transmission network protection; (b) transmission-connected demand facility or transmission-connected distribution system protection; (c) frequency control (active power adjustment); (d) power restriction.