The Nigerian Independent System Operator (NISO) has explained why part of Africa’s most populous nation is experiencing a power outage.
According to the system operator, the country’s national grid experienced a system disturbance at 11:20 hours on Wednesday, September 10, 2025.
NISO revealed that the disturbance was caused by the tripping of a generation company (GenCo), resulting in a significant load drop. This drop cascaded to other GenCos, ultimately leading to a system-wide disturbance.
In a statement, NISO noted that it immediately commenced restoration of the grid at 11:45 hours, beginning with the supply to Abuja from the Shiroro power plant. Substantial restoration has since been achieved across the country.
The grid operator revealed that an investigation is currently underway to establish the actual cause.
“A full investigation into the immediate and remote causes is underway.
“The outcome(s) of the investigation report will determine the remedial and proactive actions to be taken to forestall future occurrences,” NISO said.
Source: https://energynewsafrica.com
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