Overview
- Major utilities grouped in Aelec said the current situation does not point to a repeat of the April 28 system collapse, despite recent abrupt voltage oscillations.
- The CNMC approved temporary operating changes for roughly one to three months after Red Eléctrica warned of sharp voltage variations and sought urgent action.
- The regulator rejected Red Eléctrica’s request to mandate maximum availability of conventional plants and created a working group to assess deeper interventions.
- Red Eléctrica continues a reinforced operating mode that slightly curtails renewables and prioritizes gas and hydropower to stabilize the grid, with this approach expected to run at least into early 2026.
- Aelec links late‑September low‑voltage events to inverter rules requiring constant power factor and to the near-simultaneous connection of about 1,164 MW of solar, and it urges dynamic voltage control, STATCOMs and reactances, and alignment with European limits given Spain’s tighter 435 kV operating threshold.