If you design an electricity grid to never partition, then you need to keep a substantial headroom of transmission equipment unused to prevent cascading failures leading to a partition in case of failure of just one or two sites.
Instead, an electricity grid should be able to survive any partition like this while still keeping all frequencies within the nominal range. The total cost of such a system is lower in most cases (you need more idling generation capacity or droppable load, but less transmission capacity)
Instead, an electricity grid should be able to survive any partition like this while still keeping all frequencies within the nominal range. The total cost of such a system is lower in most cases (you need more idling generation capacity or droppable load, but less transmission capacity)
The EU system here failed to do either here.