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NISO gives reasons for collapse of national grid on Friday 

Maureen Ikpeama4842 mins

 Nigerian Independent System Operator NISO has given reasons for the collapse of the national grid on Friday, saying, at approximately 12:40 hours on Friday, 23 January, 2026, the national grid experienced a system-wide disturbance, which resulted in a total outage across the interconnected network”.

According to NISO, preliminary operational reports showed that “the disturbance was associated with the simultaneous tripping of multiple 330kV transmission lines, alongside the disconnection of some grid-connected generating units.”

It added that “these events collectively contributed to the system collapse at the time indicated.”

The system operator said restoration activities began shortly after the collapse.

“Following the outage, system restoration activities commenced at about 13:15 hours, in accordance with established grid restoration and recovery procedures,” the statement read.

NISO said electricity supply had been restored to Abuja, Osogbo, Benin, Onitsha, Sakete, Jebba, Kainji, Shiroro and parts of Lagos, while efforts were ongoing in other parts of the country.

The operator said a probe into the incident had begun. “A detailed investigation into the root and contributory causes of the disturbance is currently ongoing,” it said, adding that “the full restoration and stabilisation of the grid remains a top operational priority,” he said.

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