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2w ago

ENTSO-E Interim Report Details Overvoltages Preceding April Iberian Blackout

Investigators map millisecond-scale trips near Granada with a final causes-and-recommendations report due in early 2026.

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Die Überspannung im Stromnetz, die zu dem massiven Stromausfall auf der Iberischen Halbinsel Ende April führte, ist nach der Meinung eines Expertengremiums die "erste ihrer Art" gewesen.
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Overview

  • An interim ENTSO-E analysis traces extraordinary overvoltage events to a point a few milliseconds after 12:32:57 near Granada, triggering cascading failures.
  • Generation units across the Iberian Peninsula tripped in a rapid, stepwise sequence, with multiple solar and wind installations disconnecting within milliseconds.
  • Experts describe the overvoltages as avalanche-like, yet a single definitive root cause has not been established.
  • The 264-page fact‑finding report labels the April 28 outage the most significant event in Europe’s power system in more than two decades.
  • Officials call for stronger rules and grid resilience, with APG criticizing outdated Spanish connection standards and German TSOs noting a more meshed grid designed to withstand 3 GW of simultaneous loss.