As the press release you linked points out, the black start plan Spain trains on uses nuclear energy supplied from France to re-energize the power plants.
"Luckily", France is at an historically high level of production capacity at the moment and the connection between the two countries was reestablished fast.
According to RTE (French network manager), the interconnection was maxed yesterday at around 3GW of power.
Sadly, while Spain is part of CESA, it's not very well connected. I wouldn't be surprised if one the takeaway from the whole incident is that more interconnections are needed.
"Luckily", France is at an historically high level of production capacity at the moment and the connection between the two countries was reestablished fast.
According to RTE (French network manager), the interconnection was maxed yesterday at around 3GW of power.
Sadly, while Spain is part of CESA, it's not very well connected. I wouldn't be surprised if one the takeaway from the whole incident is that more interconnections are needed.