Following the massive blackout that occurred on 28 April in the Iberian Peninsula, the European Network of Transmission System Operators (ENTSO-E) announced on Friday 9 May how the joint group of experts (see EUROPE B13632A19) will investigate the causes of the blackout, and summarised the chronology of events.
ENTSO-E indicates that two periods of oscillations (variations in power and frequency) were observed in the continental European synchronous zone, half an hour before the incident....