Spain is but Portugal is only connected to Spain and they are currently doing a full black start.
For Spain the external power and synchronization can come from France rather than generators which will help, but the process and complexities are still mostly the same. Call it a dark start, perhaps.
Sure. Portugal is in deed completely “isolated” if it loses Spain, so it needs black start capability if it wants some degree of autonomy.
As far as containing the issue, this was a disaster. On the flip side, this was as good an opportunity to test a black start as any, it went reasonably well, and the network operator was already in the process of contracting two further dams for the ability.
For Spain the external power and synchronization can come from France rather than generators which will help, but the process and complexities are still mostly the same. Call it a dark start, perhaps.