The unprecedented blackout across the Iberian peninsula was primarily caused by REE’s failure to manage a surge in voltage, the Spanish government has said.
On 28 April, a major incident saw millions of households and businesses across Spain, Portugal and southern France suffer the largest power cut in Europe’s recent history.
The source of the outage was traced to a sudden loss of 2.2GW of electricity at Granada substation in southern Spain.
Following an investigation by the government, an official report has now been published detailing that the blackout was due to voltage control.
It points to a series of technical and operational failures that increased the severity of the event. Following the abrupt loss of power generation in Granada, a complicated chain reaction of grid disconnections soon ensued.
Within seconds, similar disconnections had occurred in Badajoz and Seville, and within 30 seconds the entire Iberian peninsula was experiencing a complete blackout.
Sara Aagesen, Spain...