The Nigerian Independent System Operator says it has fully restored power
supply to all parts of the country, and system stability has been normalised after a system disturbance.

The management of NISO disclosed this in a statement in Abuja on Monday. According to NISO, investigations into the cause and sequence of events leading to the system disturbance are currently ongoing.

It added that appropriate measures shall be put in place to forestall future recurrence of such major system incidents.
NISO stated that the national grid experienced a system disturbance at 2.01 p.m. on Monday, resulting in a partial collapse.

”It would be recalled that the Lagos-Escravos-Lagos gas pipeline was vandalised on December 10, which led to the shortage in power generation in the country. This has further led to the fragility and weakness of the national grid,” it said.

The system operator said that preliminary reports indicated that the disturbance involved the tripping of several generating units and critical 330-kilovolt transmission lines.
It said the disturbance had a widespread impact on electricity supply across parts of the country.

”However, the Delta generation complex successfully operated on island mode at the 132kV sub-transmission voltage level.
“This enabled the continued supply of electricity to Oghara, Amukpe, Benin, and Efunrun 132kV substations, with a total generation of 114 megawatts from four units at the Delta Thermal Power Station,” said the statement.

NISO added that, in line with established operational procedures, it promptly initiated system response measures using its dispatch and monitoring tools at the National Control Centre, Osogbo.
The system operator, however, reassured Nigerians of its continued commitment to proactive grid management and the application of best operational practices to ensure the stability and reliability of the national grid.