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The blackout that ocurred in the Iberian electricity system on 28th April, 2025

L. Rouco, E. Lobato, F.M. Echavarren

Summary:

This document contains a summary of the report carried out by Drs. Luis Rouco Rodríguez, Enrique Lobato Miguélez, and Francisco M. Echavarren Cerezo, Professors of the School of Engineering, at the request of Endesa and Iberdrola, on the facts and circumstances that led to the blackout in the Iberian system on 28th April 2025.
Although the report addresses all the facts and circumstances that led to the blackout, this summary aims to bring to the reader's attention novel analyses that offer well-founded answers to unresolved questions arising from a careful study of the reports issued. In preparing the report, the authors have used non-public data provided by Endesa and Iberdrola. [...]

Keywords: Voltage collapse; Voltage control; Ancillary services

Publication date: 01-Oct-2025

Citation:
L. Rouco, E. Lobato, F.M. Echavarren, "The blackout that ocurred in the Iberian electricity system on 28th April, 2025". Oct/2025. IIT-25-412I

Research topics:

Steady-state: Load flows, analysis of power system constraints, optimal load flows, voltage control ancilliary service,short-circuits, protections in transmission and ditribution networks
Stability: Large disturbance stability, tuning of frequency loadshedding schemes, excitation control, small disturbance stability, tuning of power system stabilizers, identification of AVR and governor models

Research groups:

Instituto de Investigación Tecnológica (IIT)

ODS:

Goal 7: Affordable and clean energy
Goal 9: Industry, innovation and infrastructure

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