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Spain's Grid Operator Warns Country Could Be on Verge of a Blackout

Red Eléctrica linked voltage swings to renewable energy shifts and obtained temporary rules to enhance grid stability and avoid blackouts, CNMC said.

  • On Wednesday, Red Eléctrica alerted regulators to sudden voltage swings across Spain's power network recorded over the past two weeks, warning these could impact supply security without urgent changes.
  • Amid a high share of wind and solar, REE blamed sudden programme shifts and delayed control responses, linking oscillations to renewable generation changes and dynamic voltage-control units.
  • New measures force generators active in balancing markets to keep full reserve while stricter checks require 90% compliance with 60 samples per period; Red Eléctrica must report daily to the CNMC.
  • The European Commission and European Central Bank urged households to keep a basic emergency kit and cash, while officials said no new consumer action is required as Spain nears six months since the April blackout.
  • The CNMC will consult on REE's operational proposals until October 15th, while Redeia and the Ministry for Ecological Transition requested a five-day fast-tracked hearing to accelerate measures.
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EL ESPAÑOL broke the news in Spain on Wednesday, October 8, 2025.
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