The Transmission Company of Nigeria (TCN) says it has successfully restored the national grid after disturbances in the late hours of Sunday morning.

According to a statement signed by TCN's spokesman Ndidi Mbah, "The Transmission Company of Nigeria, TCN hereby states that the grid experienced a partial disturbance at about 11:21Hours today with Ibom power islanded, feeding Eket, Ekim, Itu & Uyo transmission substations, during the period of partial disturbance. TCN initiated immediate restoration of the affected part of the grid, and presently, the grid is fully restored.

"Prior to the incident, total generation on the grid was 3,901.25 MW at 08:00Hours, a little over three hours before time of partial collapse. It is important to note that low power generation has persisted since January 2024, to date, exacerbating daily due to the lingering gas constraint.," Mbah said in the statement.

He said gas constraints were the root cause of the reduction in power generation since January and this exacerbated the disturbance suffered on Sunday and led to the partial collapse.

"...the National Control Center (NCC), the Internet of Things (IoT) revealed that just before the partial disturbance, which occurred at 11:21Hrs today, Sapele Steam & Egbin Substations lost a total of 29.32MW & 343.84MW at 11:20:14Hrs & 11:20:17Hrs respectively, totalling 373.16MW. This, combined with the current low power generation due to gas constraints, caused the imbalance leading to the partial system disturbance.

"Gas constraints continue to impact grid flexibility and stability. Ensuring sufficient gas supply to power generating stations is crucial for grid stability as sufficient generation allows for better grid management in the event of sudden generation losses like this. TCN will investigate the cause of tripping of Sapele Steam & Egbin power generating units," he further disclosed.