Overview
- The report calls for harmonising transmission voltage limits across Europe, which would lower Spain’s ceiling from 435 kV to the 420 kV common standard.
- Investigators highlight mass disconnections and limited reactive support from small inverter‑based renewables operating on fixed power factor, urging dynamic voltage control and better oversight.
- A premature trip at Granada’s Huéneja substation below legal thresholds removed about 335 MW and acted as a trigger within a broader instability.
- Restoration was completed in roughly 12 hours in Portugal and 16 in Spain, yet experts seek stronger black‑start readiness and at least 24 hours of resilient communications.
- Spain’s CNMC released parallel recommendations and is pressing to take on fuller competencies such as network planning and voltage control, a shift that would require policy decisions.