Analysis of the power system oscillations before the blackout in Spain and Portugal on April 28, 2025

IET conference proceedings. 2026

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Authors: Lijun Cai, Tobias Veith, Yanjin Hou
DOI: 10.1049/icp.2025.4524
Cited by: 0

Abstract

On April 28, 2025, the Spanish and Portuguese power grids disconnected from continental Europe. This paper analyzes the system's dynamic behavior before the event: local and inter-area oscillations, tie-line stress, and examines Spain’s post-blackout generation strategy. The findings reveal the stable operation of renewable generations after the blackout and the importance of the grid-forming control. Recommendations include power system stabilitzer (PSS) for renewable generations and enhanced blackstart planning.

Fields of Study & Subjects

Power System Optimization and Stability Frequency Control in Power Systems Power Systems and Renewable Energy

Publication details

Journal / source
IET conference proceedings.
Volume
2025
Issue
45
Pages
869–873
Publication date
1 March 2026
Language
EN