Cross-border FRR activation process
Article 147
1. The control target of the cross-border FRR activation process shall aim at enabling a TSO to perform the FRP by frequency restoration power interchange between LFC areas. 2. Each TSO shall have the right to implement the cross-border FRR activation process for LFC areas within the same LFC block, between different LFC blocks or between different synchronous areas by concluding a cross-border FRR activation agreement. 3. TSOs shall implement the cross-border FRR activation process in a way which does not affect: (a) the stability of the FCP of the synchronous area or synchronous areas involved in the cross-border FRR activation process; (b) the stability of the FRP and the RRP of each LFC area operated by participating or affected TSOs; and (c) operational security. 4. TSOs shall implement the frequency restoration power interchange between LFC areas of the same synchronous area through one of the following actions: (a) defining an active power flow over a virtual tie-line which shall be part of the FRCE calculation where FRR activation is automated; (b) adjusting a control program or defining an active power flow over a virtual tie-line between LFC areas where FRR activation is manual; or (c) adjusting the active power flows over HVDC interconnectors. 5. TSOs shall implement the frequency restoration power interchange between LFC areas of different synchronous areas by adjusting the active power flows over HVDC interconnectors. 6. All TSOs participating in the same cross-border FRR activation process shall ensure that the sum of all frequency restoration power interchanges is equal to zero. 7. The cross-border FRR activation process shall include a fallback mechanism which shall ensure that the frequency restoration power interchange of each LFC area is zero or limited to a value for which operational security can be guaranteed.