By Abubakar Yunusa
The Nigerian Independent System Operator (NISO) said the system disturbance experienced on Wednesday was caused by the tripping of an electricity generation company (GenCo).
Earlier in the day, data obtained by TheCable from the NISO showed that the megawatts (MW) generated dropped from 2,917MW to 1.5MW between 11am and 12pm.
In a statement on Wednesday, NISO said the incident led to a significant load drop.
“The disturbance was caused by the tripping of a GenCo, resulting in a significant load drop, which cascaded to other GenCos, leading to a system disturbance,” the statement reads.
“NISO immediately commenced restoration of the grid at 11:45 hrs, beginning with supply to Abuja from the Shiroro power plant, and substantial restoration has been achieved across the country.
“A full investigation into the immediate and remote causes is underway.”
The operator said the outcomes of the investigation report would determine the remedial and proactive actions to be taken to forestall future occurrences.
NISO further asked Nigerians to “bear with us as restoration is still ongoing”.
On February 12, some parts of Nigeria were without electricity after the national grid experienced a system collapse, confirmed by electricity distribution companies.
On the same day, the Transmission Company of Nigeria (TCN) denied reports claiming that the national grid collapsed twice in 2025.
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