The Nigerian Independent System Operator (NISO) says electricity supply has been fully restored across the country following a system disturbance that caused a partial collapse of the national grid on Monday.
In a statement issued in Abuja, NISO said system stability has been normalised, while investigations are ongoing to determine the cause and sequence of events that led to the incident.
The operator said the disturbance occurred at about 2:01 p.m. and involved the tripping of several generating units and critical 330 kilovolt transmission lines, resulting in widespread power outages across parts of the country.
NISO linked the fragility of the grid to reduced power generation following the vandalism of the Lagos–Escravos gas pipeline on December 10, which constrained gas supply to power plants.
According to the statement, the Delta generation complex successfully operated on island mode at the 132kV sub-transmission level, sustaining electricity supply to Oghara, Amukpe, Benin and Efunrun substations with a combined output of 114 megawatts from four generating units.
The system operator said it promptly activated established response measures using dispatch and monitoring tools at the National Control Centre in Osogbo to restore supply nationwide.
NISO assured stakeholders that measures would be implemented to prevent a recurrence, reaffirming its commitment to proactive grid management and the application of best operational practices to ensure the stability and reliability of the national grid.
