After suspicions of a cyber attack, the Spanish government announced that the main cause of the blackout that affected Spain, Portugal and part of was due to a failure at the Granada substation.
The government reported that the interruption in the power supply from Granada affected, seconds later, the cities of Badajoz and Seville. The three incidents, which occurred practically simultaneously, caused a loss of 2,2 GW of power, triggering the blackout in affected countries.
“We are analyzing millions of data points,” said Sara Aagesen, Secretary of State for Energy of Spain. “We are continuing to make progress in identifying the locations where the failures occurred. We already know that they started in Granada, Badajoz and Seville.” The investigators have ruled out a cyberattack on the REE operator, an imbalance between supply and demand, or insufficient network capacity as the causes.
Furthermore, according to an official statement from government of Spain , a t monitoring group was created between Spain and Portugal to investigate the incident in detail. The aim is to coordinate responses and improve the resilience of the Iberian electrical infrastructure in the face of chain failures such as the one that occurred on April 28.
Renewable energy
After the power outage that affected the entire country and its neighbors, the expansion of renewable energy in Spain has been questioned. Some critics claim that the low share of fossil and nuclear sources may have contributed to the blackout. The event has brought back the debate about whether or not to deactivate nuclear power plants in the country.
Despite criticism, experts say adjustable converters from small power plants, such as solar power plants, can play a key role in stabilizing the grid. However, electricity produced by large generators with larger rotating masses — such as hydraulic and steam turbines — can provide greater inertia to the grid in the face of fluctuations.
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