National grid instability will persist until repairs are completed, says TCN

The Transmission Company of Nigeria (TCN) says instability in the national grid will likely persist as the system undergoes repairs after another round of shutdown.

The national grid collapsed again on Thursday — the second time in 72 hours — leaving the country in darkness.

Providing updates on the incident in a statement, Ndidi Mbah, general manager of public affairs at TCN, said the grid experienced a disturbance at approximately 11:29 am, caused by a sudden rise in frequency from 50.33Hz to 51.44Hz.

She said the frequency surge was triggered by issues at one of its substations, which was then shut down to prevent further complications.

“Recovery efforts began immediately, and the Abuja Axis was restored within 28 minutes. Recovery is still ongoing,” the statement reads.

Mbah said the TCN is actively engaged in significant repair work on several critical transmission lines and substations.

The facilities, according to Mbah, include the 330kV transmission lines along the Shiroro-Mando axis, major upgrades at the Jebba transmission substation, and the restoration of the second Ugwuaji-Apir 330kV transmission line.

‘TCN IS WORKING TO ADDRESS IDENTIFIED WEAKNESSES IN TRANSMISSION SYSTEM’

The public affairs manager said following the submission of the investigative report on the causes of previous grid collapses, TCN has started working to address the identified weaknesses in the transmission system.

Mbah said efforts are afoot to address the gaps outlined in the report and to strengthen the grid’s overall stability and resilience.

“These efforts include both technical upgrades and strategic interventions based on the committee’s recommendations,” she added.

“However, it is important to note that while these repairs and improvements are underway, some degree of instability in the system is likely to persist until all major works are completed.”

Mbah, acknowledging the impact of the disruptions, appealed to the public for their patience and understanding during the challenging period.

She reaffirmed the company’s commitment to improving the reliability of electricity supply, acknowledging the crucial role that stable power has in supporting Nigeria’s socio-economic growth.

The TCN official also assured the public that all necessary measures are being taken to secure the grid’s long-term stability, following the investigative committee’s recommendations.

She added that the transmission company is addressing infrastructure issues, including damage from vandalised transmission lines.

On October 5, the grid experienced a collapse – the ninth time in 2024.

TCN had blamed a series of lines and generator trippings for the instability of the grid and a partial disturbance.

On October 17, Adebayo Adelabu, minister of power, said the frequent system failure at the national grid is inevitable due to the outdated infrastructure.

Adelabu also said the country will continue to experience grid disturbances until there is a complete overhaul of the system.