Overview
- On June 17, Spain’s final report concluded that an overvoltage spike on April 28 triggered protective trips across the Iberian grid, leaving Spain, Portugal and parts of France and Morocco in darkness.
- The investigation cited insufficient planning by operator Red Eléctrica and improper shutdowns by conventional power plants as key factors that amplified the voltage surge.
- Authorities found no signs of a cyberattack and identified a shortfall in voltage regulation capacity as the root technical failure.
- Transportation systems halted and communications were disrupted for millions of residents, underscoring the peninsula’s vulnerability from its limited interconnection with the European grid.
- Madrid plans to invest in synchronous condensers, intelligent inverters and large-scale battery storage to strengthen grid stability and resilience.