Spain's grid operator disputes miscalculation in blackout report

A view shows Santa Llogaia electrical sub-station connected to the interconnection grid between France and Spain that tripped after a sudden, large drop in power supply and caused the major blackout in the Iberian Peninsula, in the village of Santa Llogaia d'Alguema, near Figueres, Spain April 29, 2025. REUTERS/Bruna Casas/File Photo

MADRID (Reuters) -Spanish grid operator Redeia disputed the findings of a government report that said failure by the operator to calculate the correct mix of energy was one of the factors that led to a massive blackout in Spain and Portugal on April 28.

Redeia operations chief Concha Sanchez also told a news briefing on Wednesday its own investigation had discovered anomalies in the disconnection of power plants on April 28 even though voltage in the system was within legal limits, as well as an anomalous growth in demand from the transport network.