National grid collapse Nigeria was triggered by the simultaneous tripping of multiple 330kV transmission lines and the disconnection of some grid-connected generating units, the Nigerian Independent System Operator (NISO), an arm of the Transmission Company of Nigeria (TCN), has said.
In a statement released via its social media account on Friday, NISO said operational reports showed that the disturbance led to the system collapse recorded earlier in the day.
NISO explained that the events “collectively contributed to the system collapse at the time indicated.” The operator, however, noted that “restoration activities commenced at about 13:15 hours, in accordance with established grid restoration and recovery procedures.”
It added, “As at the time of this update, electricity supply has been successfully restored to Abuja, Osogbo, Benin, Onitsha, Sapele, Jebba, Kainji, Shiroro and parts of Lagos, while restoration efforts are continuing progressively in other parts of the country.”
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The system operator also disclosed that investigations were ongoing to determine the exact cause of the incident. “A detailed investigation into the root cause and contributory causes of the disturbance is currently ongoing,” NISO stated.
Data obtained from the system operator showed that the national grid collapse Nigeria was still being managed as restoration activities continued across the country. Power generation by seven generating companies (GenCos) stood at 1,118.80 megawatts (MW) as of the time of filing this report.
Further improvement was observed in the distribution load profile, with all eleven distribution companies (DisCos) recording a total load allocation of 1,540MW. Ikeja DisCo had the highest allocation with 350MW, followed by Abuja DisCo with 270MW. Ibadan DisCo recorded 240MW, while Eko DisCo had 200MW.
Port Harcourt DisCo was yet to receive allocation, standing at 0.00MW. Yola DisCo recorded the lowest allocation with 30MW, followed by Jos DisCo with 30MW, Enugu DisCo with 100MW, Benin DisCo with 70MW, while Kano and Kaduna DisCos recorded 100MW and 150MW respectively.
NISO said efforts were still underway to stabilise supply nationwide following the national grid collapse Nigeria, assuring that power would be restored progressively to remaining areas.