The Nigerian Independent System Operator (NISO) has confirmed the successful restoration of Nigeria’s national electricity grid following a system disturbance that disrupted power supply across several parts of the country on Tuesday morning.
In a statement published on its official X (formerly Twitter) handle on Tuesday evening, the system operator said electricity supply had been fully restored to all affected areas, bringing an end to hours of widespread outages.
According to NISO, the disturbance occurred at about 10:48 a.m. and was traced to a voltage anomaly originating from the Gombe Transmission Substation.
The voltage disturbance, the operator explained, rapidly propagated through the transmission network, impacting key substations, including those at Jebba, Kainji and Ayede.
The incident led to the tripping of some transmission lines and generating units, resulting in what NISO described as a partial system collapse.
The disruption marked the second major grid incident in less than five days in 2026, heightening public concern over the stability of Nigeria’s power infrastructure.
“The voltage disturbance rapidly propagated across the network, affecting Jebba, Kainji, and subsequently Ayede Transmission Substations,” the operator said. “The event was accompanied by the tripping of some transmission lines and generating units, resulting in a partial system collapse.”
NISO noted that corrective measures were immediately deployed to stabilise the system, with restoration efforts commencing at about 11:11 a.m. and continuing until normal operations were fully re-established.
The system operator also moved to counter reports suggesting a total collapse of the national grid, stressing that the incident was limited in scope.
“The incident only affected part of the grid and therefore did not amount to a total collapse, contrary to some media reports,” the statement added.
Meanwhile, the Eko Electricity Distribution Company (EKEDC) confirmed that power supply from the national grid had resumed, although allocations remained limited as of Tuesday evening.
In a customer notice, EKEDC said restoration across its network was ongoing. “We are pleased to inform you that power restoration from the grid has resumed, though with limited allocation,” the company stated, urging customers to remain patient as feeders are gradually brought back online.
Nigeria’s electricity grid has continued to face recurrent disturbances attributed to ageing infrastructure, technical faults and system instability, with Tuesday’s incident once again underscoring the fragility of the national power network.