A substantial electrical overvoltage that resulted in a large-scale blackout across Spanish territory and Portugal has been classified as the "most critical" power disruption in Europe during the past 20 years, and represents a unprecedented situation of its type, according to a newly released study.
Damian Cortinas of the organization of power network managers announced that this particular event marked the pioneering recorded electrical disruption to be directly caused by excessive voltage, which develops when surplus electrical pressure accumulates within a system.
"This is new territory," the official commented, explaining that the group's function was "not to apportion blame to any party" regarding the primary source.
The spring's outage produced major interruption for almost one full day when it plunged various regions into powerless state, disrupting internet and telephone connections and stopping transport links.
Widespread Consequences
The blackout influenced large parts of the Spanish territory and Portugal, and momentarily influenced southwestern France.
The study, published on Friday, centered on the state of the energy infrastructure on the day of the blackout and the progression of developments culminating in it.
Infrastructure Failures
A cascade of "sequential electrical spikes" - characterized as an rise in the network electrical pressure above the established norm - was found to be the primary cause behind the outage, the report concluded.
Overvoltage can be caused by spikes in systems due to oversupply or electrical storms, or when defensive mechanisms are inadequate.
Based on the investigation, automatic defence plans were activated but failed to halt the power system from collapsing.
Multiple Examinations
The report succeeds multiple independent investigations and reports by the Madrid authorities, as well as power and grid companies. The oversight organization and parliament members are also conducting independent inquiries.
The Madrid administration considers that the organization's report corroborates its own findings.
The minister for environmental policy declared that it was "entirely consistent" with the results of an examination it ordered which concluded in June that each of the national grid provider and private electricity companies were at fault.
Contrasting Perspectives
Both the main network manager and the independent corporations have maintained that they were not responsible. The parent company has blamed the blackout on certain coal, gas and nuclear power plants' inability to help sustain appropriate voltage.
National energy companies said it was generated by inadequate preparation from system controllers.
Analysis Obstacles
The report also mentioned that specific essential details was missing and that "collecting thorough, reliable details proved extremely difficult for this inquiry".
A definitive analysis, to be issued in the first quarter of next year, will analyze the underlying reasons of the electrical spike and the procedures implemented to regulate electrical levels in the system.
Governmental Controversy
The outage initiated a extensive controversy that extended into the governmental sphere about the country's power strategy.
The competing parties indicated that an growing dependence on green electricity, advocated by the ruling coalition of the prime minister, could have been a relevant element in causing the failure and the territory's diminishing production of atomic power meant a dependable back-up was inaccessible.
The administration roundly rejected these theories and the new report was prudent to avoid taking sides when it concerned the sources of the month's exceptional failure.
Direct Consequences
The power disruption forced professional tennis tournament organizers to stop a game midway during the event.
National atomic energy facilities automatically stopped when the failure occurred, and the Spanish oil company reported it suspended activities at its oil refineries.
Social Disorder
Edifices were plunged into darkness, while communication tools and intersection indicators ceased functioning. Lines wound through city blocks and electronic transactions malfunctioned, compelling people to wait for currency and crowd into mass transit as alternative travel networks were not running.
First responders were dispatched to 286 buildings to rescue people stuck in lifts in the capital area and hospitals implemented crisis protocols, halting standard operations.
