Brazil power outage caused by Eletrobras subsidiary failure

Brazil’s mines and energy minister Alexandre Silveira said on Wednesday a transmission line failure at a subsidiary of electric utility company Eletrobras caused outages across the country earlier this week.
Several Brazilian states faced a series of power outages on Tuesday morning that affected subway stations and other infrastructure services.
Silveira told reporters that a transmission line in the northeastern Ceara state operated by a subsidiary of Electrobras called Chesf presented a failure in its system, resulting in a series of other “system failures.”
“Due to a programming error, the system didn’t protect itself as it should have done and caused a series of other system failures from then on,” he said.
The issue will be investigated by the country’s Electric System Operator (ONS), Silveira said, adding it was still not possible to say whether the event was caused by a human or systemic fault.