Nigeria’s national electricity grid suffered another major disturbance on Tuesday morning at approximately 10:48 a.m., plunging large parts of the country into darkness.

This marks the second significant grid failure in less than five days, raising renewed concerns about the stability of the country’s power infrastructure.

The Nigerian Independent System Operator (NISO) later confirmed that electricity supply had been restored, stating via its official X account that the grid had returned to normal following swift intervention efforts.

NISO Explains Cause and Restoration Efforts

According to NISO, the Tuesday incident was caused by a voltage disturbance originating at the Gombe Transmission Substation.

The disruption quickly spread across the network, affecting critical substations including Jebba, Kainji, and Ayede. This chain reaction led to the tripping of several transmission lines and generating units.

NISO emphasized that the event constituted a “partial system collapse,” countering reports that described it as a total grid failure. Restoration efforts began at approximately 11:11 a.m., with corrective measures implemented to stabilize the system and restore electricity supply across affected areas.

Distribution Companies Confirm Impact as Power Woes Persist

Electricity distribution companies across the country confirmed the outage. Eko Electricity Distribution Company (EKEDC) notified customers of a system collapse and later announced that power restoration had resumed, though with limited allocation.

Customers were urged to remain patient as feeders were gradually brought back online.

Abuja Electricity Distribution Company (AEDC) and Port Harcourt Electricity Distribution Company (PHEDC) issued similar advisories, assuring consumers that technical teams were coordinating with stakeholders to restore supply promptly.

The latest incident follows a total system collapse last Friday at about 12:40 p.m., which NISO attributed to the simultaneous tripping of multiple 330kV transmission lines and grid-connected generating units.

Although power was restored to major cities later that day, the repeated disruptions continue to strain businesses and households, forcing many Nigerians to depend on expensive alternatives such as generators and solar power.