In a statement on Friday evening, the electricity transmission company said full recovery was successfully achieved by 10:00 p.m. that same day.
The company said that a report from the National Control Centre (NCC) in Osogbo, showed that the system disturbance was triggered by a significant reduction in generation capacity, primarily due to gas constraints.
According to the TCN, the reduction led to a rapid decline in system frequency, creating a sudden grid imbalance.
The TCN further added that the imbalance in grid stability was exacerbated by the sudden tripping of Egbin generation turbine 3, resulting in an additional loss of 167MW load and the subsequent collapse of the grid.
The statement added: “The grid has, however, since been recovered and is stable, and is currently transmitting all the generated power to distribution load centres nationwide.
“TCN emphasizes its unwavering commitment to addressing grid challenges and actively working to mitigate disruptions.
“In instances where challenges extend beyond TCN’s control, the company collaborates with other stakeholders in the power sector value chain to minimize the impact and swiftly restore the grid to normal operation.”