The Nigerian Independent System Operator (NISO), a division of the Transmission Company of Nigeria (TCN), has stated that the collapse of the national grid that occurred earlier on Friday was due to the concurrent tripping of multiple 330kV transmission lines along with the disconnection of several power generation units connected to the grid.
In a statement shared on its official social media platforms on January 23, NISO indicated that operational reports confirmed these simultaneous incidents led to the disturbance in the system that resulted in the blackout.
The operator noted that restoration activities started around 1:15 PM, following the established protocols for grid recovery and restoration.
“As of this update, power supply has been effectively restored to multiple locations including Abuja, Osogbo, Benin, Onitsha, Sapele, Jebba, Kainji, Shiroro, and certain areas in Lagos, with ongoing restoration efforts in other regions of the country,” the statement detailed.
Additionally, NISO mentioned that an extensive investigation is currently in progress to identify both the primary and contributing factors that led to the disruption.
According to data from the system operator, power generation is gradually improving as the restoration efforts continue. At the time of this report, seven generating companies were collectively contributing a total of 1,118.80 megawatts back to the grid.
In terms of distribution load allocation, there has been a notable recovery, with the eleven electricity distribution companies (DisCos) receiving a total allocation of 1,540MW.
Ikeja DisCo received the highest allocation at 350MW, followed by Abuja DisCo at 270MW. Ibadan DisCo was granted 240MW, while Eko DisCo received an allocation of 200MW.
Port Harcourt DisCo had no allocation reported, standing at 0.00MW. Both Yola and Jos DisCos received the lowest allocations, each being given 30MW. Enugu DisCo was allocated 100MW, Benin DisCo received 70MW, while Kano and Kaduna DisCos obtained 100MW and 150MW respectively.
NISO has affirmed that restoration efforts will proceed until full stability is re-established in the national grid.

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