> It's clear to the utility company operators. They're just not making it public.
please inform us about it!! we all want to know!!
All we now right now is a major power fluctuation in Spain and cascaded to Portugal, as at that time Spain was outputting lot of cheap solar power and Portugal was using that power to store in their hydro storage systems and later resell that same power, just after sunset, when power demand is higher. France was also buying Spanish cheap solar power, but as Spain/France connections are somewhat weak, not at same amount range that Portugal was using.
So something went bad in Span and failed almost all the grid and due to the amount of power imported, Portugal also had the same problem. France, only the Spain border region were affected, but probably saving France grid also generated smaller power problems in other European countries (there were some reports of smaller problems in several countries), as France export much nuclear electricity to other European countries.
So what is confirmed is that the origin of the problem was somewhere in Spain. Real causes are still unknown, with some saying a cyberattack (already denied by several sources), other saying an unusual environmental (too hot, too cold differential messing the predicted power production/distribution), Solar flares, human error... and Putin invading Europe... A few years ago, in the Balkans, a tree top cause a similar problem on high voltage lines. Also in the past, a stork tried to do a nest in a high voltage line (there are protections to avoid that, but it managed to do it anyway) and took the power of some Lisbon regions for a couple of hours.
Anyway, nobody have a real trusted info and Spain electric grip operator still didn't report anything useful, they are mostly busy restoring all the grid and postponed the investigation to after the grid is restored.
France and north of Spain, near France, recovered power a few hours after. Portugal manage to recover almost everything on night fall and mostly only the capital still have power missing). South of Spain received help from Morocco and started to also recover that regions faster. Now most of Spain also have restored power, but there are still problems in several problems.
Every time a region have their power restored, it can help the bordering regions to restore their power, but it is always a slower process. Electric power on this size is not a school circuit, it much more complex and needs always to have the system in sync, so another blackout doesn't happen again and waste all the work already done. At least in Portugal, there are warnings that smaller cuts (a couple of minutes) may still happen to help the grid to return to be in sync