The Transmission Company of Nigeria (TCN) says instability in the national grid will likely persist as the system undergoes repairs after another round of shutdown.
The national grid collapsed again on Thursday — the second time in 72 hours — leaving the country in darkness.
Providing updates on the incident in a statement, Ndidi Mbah, general manager of public affairs at TCN, said the grid experienced a disturbance at approximately 11:29 am, caused by a sudden rise in frequency from 50.33Hz to 51.44Hz.
She said the frequency surge was triggered by issues at one of its substations, which was then shut down to prevent further complications.
“Recovery efforts began immediately, and the Abuja Axis was restored within 28 minutes. Recovery is still ongoing,” the statement reads.
Mbah said the TCN is actively engaged in significant repair work on several critical transmission lines and substations.
The facilities, according to Mbah, include the 330kV transmission lines along the Shiroro-Mando axis, major upgrades at the Jebba transmission substation, and the restoration of the second Ugwuaji-Apir 330kV transmission line.
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