Brazil Opens Inquiry After Nationwide Blackout Triggered by Paraná Substation Fire

Overview

• A fire at 12:32 a.m. in a reactor at the Bateias substation near Curitiba initiated a disturbance that cut roughly 9.7–10 GW of load across the national grid.
• Automatic load‑shedding schemes (ERAC) operated and isolated the South from the rest of the system, stabilizing flows during the event.
• Supply was reestablished in the North, Northeast, and Southeast/Central‑West within about 1 hour 30 minutes, with the South fully restored around 2 hours 30 minutes after the incident.
• Millions of customers experienced short outages, including about 937,000 in São Paulo, 450,000 in Rio de Janeiro, and 294,000 in Pará, with interruptions ranging from roughly 8 minutes to an hour.
• Aneel dispatched inspectors to the Bateias site and an ONS operations center and opened oversight proceedings, while ONS and the energy ministry advance a disturbance analysis with a preliminary step this week and a full report due in 30 days.