🔗 Share this article

A substantial power surge that resulted in a widespread electrical failure across Spain and Portugal has been classified as the "most critical" power disruption in Europe during the past 20 years, and represents a pioneering occurrence of its category, according to a newly released report.

Damian Cortinas of the association of electricity grid operators announced that this particular event marked the initial documented blackout to be directly caused by excessive voltage, which occurs when surplus electrical pressure builds up within a system.

"This is new territory," the official commented, adding that the association's role was "not to assign responsibility to any organization" regarding the root origin.

The April's power failure produced significant disruption for approximately 24 hours when it cast numerous zones into darkness, cutting internet and telephone connections and halting transport links.

Extensive Impact

The blackout impacted extensive regions of Spain and Portugal, and briefly affected French border regions.

The report, issued on the weekend, concentrated on the state of the electrical networks on the day of the outage and the sequence of events leading up to it.

Technical Breakdowns

A cascade of "cascading overvoltages" - defined as an rise in the electrical supply voltage exceeding the established norm - was found to be the main reason behind the blackout, the report found.

Overvoltage can be generated by surges in systems due to excess production or electrical storms, or when protective equipment are inadequate.

According to the investigation, automated protection systems were initiated but could not prevent the power system from failing.

Several Examinations

The investigation succeeds various distinct inquiries and reports by the Madrid authorities, as well as energy corporations. The regulatory body and parliament members are also carrying out independent inquiries.

The Spanish government believes that the association's report supports its earlier determinations.

The minister for ecological transition stated that it was "completely in line" with the findings of an investigation it authorized which wrapped up in June that both the primary network operator and private electricity companies were culpable.

Conflicting Narratives

Each of the main network manager and the commercial companies have insisted that they were not to blame. The owning corporation has assigned responsibility for the failure on some traditional generation stations' failure to help maintain correct power parameters.

National energy companies said it was triggered by deficient strategy from grid operators.

Investigation Difficulties

The report also mentioned that some important data was absent and that "gathering complete, high-quality data proved very challenging for this investigation".

A definitive analysis, to be issued in the initial three months of the following year, will analyze the root causes of the overvoltage and the procedures used to regulate voltage in the grid.

Governmental Discussion

The failure sparked a broader debate that extended into the governmental sphere about the nation's electrical approach.

The opposition proposed that an expanding commitment on renewable energy, championed by the left-wing government of the prime minister, could have been a contributing factor in triggering the outage and the nation's reducing availability of nuclear electricity meant a reliable alternative was not available.

The administration roundly rejected these hypotheses and the new report was cautious to remain neutral when it involved the reasons of the month's exceptional failure.

Instant Impacts

The power disruption compelled Madrid Open Tennis organizers to halt a match midway during the event.

The country's nuclear stations automatically stopped when the failure hit, and the fuel processing entity announced it suspended activities at its petroleum facilities.

Civil Disruption

Buildings were cast into blackout, while cellular devices and traffic lights failed to operate. Lines snaked around city blocks and digital purchases malfunctioned, obliging people to queue for cash and pack onto buses as alternative travel networks were not running.

First responders were summoned to numerous structures to free people confined in vertical transport in the capital area and healthcare centers implemented emergency plans, suspending normal activities.