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Following the collapse of the national grid on Wednesday, the Transmission Company of Nigeria, TCN, has said that the repair is at the final stages.
This was disclosed by the TCN General Manager, Public Affairs, Mrs. Ndidi Mbah, in a statement issued to journalists.
According to Mbah, although the national grid experienced challenges around 11:27a.m on Wednesday, the repair was at the final stages as at 11:0p.m.
She said, “The incident was as a result of a sudden drop in system frequency from 49.94 Hertz (HZ) to 47.36Hz, which created system instability,” she said.
Hertz is a unit of frequency that replaces the earlier term of one cycle per second (cps).
According to the general manager, reports from the National Control Centre (NCC), showed that the collapse was informed by the tripping of a unit with a load of 106 Megawatts (MW) in one of the generating stations due to “Exhaust over Temperature”.
She added that the tripping caused the pulling out of other grid-connected units in the plant, resulting in aggregated generation loss of 457MW.
“A train of events ensued, culminating in the collapse of the national grid.
“As obtainable in all systems, when a component of the electric power system is defective, the entire configuration is vitiated,” she said
Mbah added that an investigation has been launched to unravel the cause of the failure.