Spain grid operator rules out cyberattack caused blackout
Authorities were still trying to establish the cause of the crisis, with Spanish Prime Minister Pedro Sánchez pleading with people "not to speculate" and avoid spreading "misinformation".
"With the analysis that we have been able to carry out up to now, we can rule out a cybersecurity incident in the facilities" of national grid operator Red Eléctrica, its director of operations Eduardo Prieto told a news conference.
"There was no type of intrusion in Red Electrica's control systems that may have caused the incident," he added.
After the authorities worked tirelessly during the night to restore power progressively across Spain, Prieto said the electric system had been "normalised" and "working in a stable and correct way".
Portuguese grid operator REN denied on Tuesday it was behind a message circulated on social media attributing the blackout to a rare atmospheric event.
The message in Portuguese said there was a "fault" in the Spanish electricity grid linked to "abnormal oscillations were recorded in the very high-voltage lines (400 kV), a phenomenon known as 'induced atmospheric vibration'."
"REN confirms we did not put out this statement," spokesman Bruno Silva told AFP, without giving further details.
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Local Spain
29-04-2025
- Local Spain
Q&A: How can Spain's entire electricity grid go down in five seconds?
General power outages like the one that hit Spain and Portugal this week can have multiple causes but the blackout highlighted how vulnerable the regional system on the Iberian peninsula can be. Why has the cause not yet been identified? The electrical grid is a backbone with complex branches consisting of thousands of interconnected components. "The grid operators must carefully analyse massive amounts of real-time data like frequency shifts, line failures, generator statuses and protection system actions to trace the sequence of events without jumping to conclusions," Pratheeksha Ramdas, senior new energies analyst at Rystad Energy, told AFP. What are the usual causes? Outages are often caused by a sudden shutdown of a source of production like a power plant due to a technical fault or a fuel shortage supplying thermal power plants. In recent years, natural disasters such as storms, earthquakes, forest fires, extreme heat or cold sometimes intensified by global warming have damaged infrastructure or created peaks of demand for heating or air conditioning. Other possible causes include overloads on high-voltage power lines, which force excess electricity to move to other lines, and cyberattacks, which Spain and Portugal have ruled out, but which are an increasingly mentioned threat as networks become more digitised. Was there an imbalance between supply and demand? In Spain on Monday evening, grid operator REE mentioned a "strong fluctuation in power flows, accompanied by a very significant loss of production". In Europe, the electrical frequency on the network is calibrated to a standard of 50 hertz (Hz). A frequency below that level means not enough electricity is being produced to meet demand. In contrast, a frequency above 50 Hz means that less electricity needs to be made. Operators have to order power plants in real time to produce more or less electricity according to demand to keep a frequency of 50 Hz. "Maintaining that frequency is a matter of balance," said Michael Hogan, senior advisor at the Regulatory Assistance Project, an NGO. If the frequency moves away from 50Hz, automated protection systems kick in to cut off parts of the grid to prevent damage to equipment in a domino effect. "Once power stations begin to shut themselves down for protection the situation can quickly get out of control," Hogan told AFP. "But... it's very rare for that to reach the state it did in Iberia yesterday (Monday)." How Monday's problem all started is difficult to determine. "One of the factors that most likely contributed to the instability is the weak interconnection between the peninsula and the rest of the western European grid, which meant that there wasn't much inertia in that part of the network to dampen the oscillations on the Spanish side of the interconnection," said Hogan. But that is likely only a contributory factor and not the root cause. "It will probably be the failure of one or two major transmissions facilities, which then cascaded to other connected parts of the network," said Hogan. "But what would have caused that initial transmission failure remains to be learned." What effect did renewable energy have? In Spain, about 40 percent of electricity comes from solar or wind power. At midday on Monday it was even more at about 70 percent. Unlike gas-fired power stations which need several minutes to start, "solar and wind generation cannot be controlled on demand and must often be curtailed", Rystad Energy's Ramdas told AFP. The European Network of Transmission System Operators (ENTSOE) warned on April 18 about the risks of solar overproduction as good weather approaches. Ramdas said Monday's disruption was a "clear warning". "Without stronger domestic resilience and improved regional coordination, future grid failures could have even more consequences," she wrote in a client note. "Without sufficient flexibility measures like storage, fast-ramping plants or strong interconnectors, large swings in renewable output can destabilise the grid," she told AFP. Lion Hirth, an energy consultant and professor of energy policy at the Hertie School in Berlin, said it was "likely" that "a system with very little conventional generation online (nuclear, gas, coal, hydro) has less dampening inertia, (in other words) is more prone to such oscillations getting out of control. "So, despite the uncertainty, I think it is fair to say that it didn't help that the Iberian system was mostly running on wind and solar on Monday noon," he added.
Local Spain
29-04-2025
- Local Spain
Spain grid operator rules out cyberattack caused blackout
Authorities were still trying to establish the cause of the crisis, with Spanish Prime Minister Pedro Sánchez pleading with people "not to speculate" and avoid spreading "misinformation". "With the analysis that we have been able to carry out up to now, we can rule out a cybersecurity incident in the facilities" of national grid operator Red Eléctrica, its director of operations Eduardo Prieto told a news conference. "There was no type of intrusion in Red Electrica's control systems that may have caused the incident," he added. After the authorities worked tirelessly during the night to restore power progressively across Spain, Prieto said the electric system had been "normalised" and "working in a stable and correct way". Portuguese grid operator REN denied on Tuesday it was behind a message circulated on social media attributing the blackout to a rare atmospheric event. The message in Portuguese said there was a "fault" in the Spanish electricity grid linked to "abnormal oscillations were recorded in the very high-voltage lines (400 kV), a phenomenon known as 'induced atmospheric vibration'." "REN confirms we did not put out this statement," spokesman Bruno Silva told AFP, without giving further details.
Local Spain
29-04-2025
- Local Spain
Claim that Spain's blackout was caused by rare weather event debunked
Energy Portuguese power network operator REN denied on Tuesday it was behind a message circulated on social media attributing the massive blackout across the Iberian peninsula to a rare atmospheric event. Barely a corner of the peninsula, which has a joint population of almost 60 million people, escaped Monday's power outage. No firm cause has yet emerged. "REN confirms we did not put out this statement," spokesman Bruno Silva told AFP, without giving further details. The message in Portuguese circulating on social media said the shutdown was due to "a fault in the Spanish electricity grid linked to a rare atmospheric phenomenon". "Due to extreme temperature variations in inland Spain, abnormal oscillations were recorded in the very high-voltage lines (400 kV), a phenomenon known as 'induced atmospheric vibration'," the message said. The Spanish weather office (AEMET) said on Tuesday it had not detected any unusual meteorological or atmospheric phenomena on Monday and nor had there been any sudden temperature changes. Spanish grid operator REE has ruled out any "cybersecurity incident" as a cause. More #Energy
