European electrical networks suffered from fluctuations half an hour before the overall blackout in Spain
The European Network of Electricity Transmission Managers (ETSO-E) on Friday blackout On April 28 it was due to a “complex events” that was recorded Two periods of tension fluctuations And frequency in electrical systems within half an hour before the accident.
The association, responsible for the independent European investigation of the accident, stated in a statement that in half an hour before the blackout, which occurred at 12:33 pm, the fluctuations were recorded in terms of strength and frequency between 12:03 and 12:07 and between 12:19 and 12:21.
“Electric and France (RTE) managers have taken measures to Reducing these fluctuations. At the time of the accident, there were no fluctuations and the electrical system variables were within the normal operating scope, “Entso-e, who found that Spain was until then 1000 MW to France, made it 2000 MW of Portugal and 800 megawatts to Morocco.
The agency indicated that the event started at 12:32:57 “A series of different travel generations” In southern Spain for about 2,200 megawatts.
“In Portugal and France, no generation trips were noticed. As a result of these incidents, The frequency decreased There is an increase in tension in Spain and Portugal, “which is combined in this initial report.
Already between 12:33:18 and 12:33:21, the frequency on the peninsula continued to drop to 48 Hercios, which stimulates emergency plans for Spain and Portugal. In turn, the current networks between France and Spain alternate They successfully separated before losing synchronization.
Thus, at 12:33:24 “A complete collapse of the Iberian electrical system” The high -voltage cables between France and Spain also stopped transporting energy.
Restore the network
ENTSO-E confirmed that at 12:44 am, the first line of 400 kV was re-activated between western Spain and France again, and after 20 minutes, the correlation between Morocco and Spain were already working.
From the beginning of the restoration to about 13.30, many Spanish photovoltaic factories were launched with the “Black Starting Capacity” to start regime restoration. At 1:35 pm, call in The eastern side of the French Spanish border was active again.
Also, at 16:11 and 17:26, the two electric manufacturers in Portugal managed with the black start capacity to restart yet “Previous unsuccessful attempts.”
After that, he received the first line from 220 kV between Spain and Portugal energy at 6:36 pm, which quickly regained the Portuguese regime. In addition, at 9:35 pm, it was converted 400 kV connection This is in the south of both countries.
Finally, the total recovery of the transportation system It was completed in Portugal at 00:22 On April 29 and in Spain at 04:00 on the same day.
The ministry considers it “good news”
For its part, The Ministry of Environmental Transition and Demographic Challenge It was considered “good news” that analyzed the causes of blackout and preliminary estimates of generation losses were provided. In addition, “has received” the appointment of the Experts Committee who will direct the independent investigation of Entso-E.
“Entso and there is a transfer of that The causes of the crisis are complex Sources from the ministry informed that there are two periods of tension and volatility in European electrical systems within half an hour before the accident, which settles on TSO from Spain and France.
Likewise, he led the department by Sarah aagesen It has been reported that the crisis analysis committee, which will continue the working groups that will continue to work this week, meet again next Monday.
“The committee will analyze all available elements You will continue to work with all operators To know the certainty of the origin of the accident, “they added.
