The unprecedented blackout that brought the Iberian peninsula to a standstill at the end of April was caused by surging voltages triggering “a chain reaction of disconnections” that shut down the power network, an expert report commissioned by the Spanish government has found.
Speaking to reporters on Tuesday afternoon, the country’s environment minister, Sara Aagesen, ruled out a cyber-attack as the cause of the outage on 28 April, saying it had been down to a “multifactorial” system failure caused by the network’s inability to control grid voltage.
